Propylene / silane interpolymer compositions

Abstract

A crosslinked composition formed from a first composition comprising at least one propylene / silane interpolymer, as component a, and at least one peroxide, as component b; and wherein the crosslinked composition comprises a gel content ≥ 10 wt%, based on the weight of the crosslinked composition. A composition comprising, as component z, at least one propylene / silane interpolymer; and wherein interpolymer comprises, in polymerized form, one of the following i) through iii): i) ethylene in an amount ≤ 25 wt%, based on the weight of the interpolymer; or ii) an alpha-olefin in an amount ≤ 25 wt%, based on the weight of the interpolymer; or iii) ethylene and an alpha-olefin, where the combined amount of both is in an amount ≤ 25 wt%, based on the weight of the interpolymer; and wherein interpolymer comprises, in polymerized form, ≥ 75 wt% propylene, based on the weight of the interpolymer.

Description

PROPYLENE / SILANE INTERPOLYMER COMPOSITIONSBACKGROUND OF THE INVENTIONPeroxide initiated crosslinking, functionalization and rheology modification are widely used in polyolefin (POE) applications. Most classes of polyolefins utilize crosslinking to achieve dimensional, thermal, and environmental stability, beyond that of the purely thermoplastic material.A longstanding problem in the area of polyolefin thermosets, is the inability of polypropylene, or propylene-rich copolymers, to undergo effective radical (peroxide) cure at temperatures above the melting point. This is due to the competing degradation of molecular weight that occurs via “beta-scission” at tertiary radical sites at elevated temperatures. Curable propylene-containing polymers, such as EPDM, do exist, however they tend to have high ethylene levels (45-75 wt%) as well as high levels of termonomer (diene, 3 wt% or more), and therefore only represent a subset of the crosslinked compositions, and resulting properties, that can be achieved. Thus, there is a limited number of propylene-based polymers that can be effectively crosslinked using radical / peroxide crosslinking. Conventional solutions typically use small molecule coagents during the formulation of the polymer or use ionizing radiation at low temperatures. Generally these solutions do not address the inherent incurable nature of the polymer backbone, in a manner that is easy to implement and / or compatible with existing thermal cure processes. Thus, there is a need for new propylene-based polymers and compositions that can be effectively reacted with peroxide to form highly crosslinked polymers, and which are not extensively degraded.International Publication WO2021 / 262777A1 discloses a process to form a crosslinked composition, the process comprising thermally treating a composition that comprises the following components: a) at least one olefin / silane interpolymer comprising at least one Si-H group, b) at least one peroxide, and c) optionally, at least one crosslinking coagent (see abstract). This reference also discloses a composition that comprises the following components: a) at least one olefin / silane interpolymer comprising at least one Si-H group, b) at least one peroxide, and c) optionally, at least one crosslinking coagent (see abstract). Experimental examples of ethylene / silane interpolymers are provided (see pages 32-45).U.S. Patent 6,624,254 discloses silane functional polymers having uniform silane distribution, long chain branching or tertiary silane functionality and conversion thereofthrough coupling, hydrolysis, hydrolysis and neutralization, condensation, oxidation or hydrosilation (see abstract). Oxidation of the silane group may involve reaction with oxygen, ozone, peroxide or other suitable oxidant. The oxidation reaction can be accelerated using a radical initiator such as peroxides or azobisiosbutyronitrile. The resulting =Si-OH groups can be condensed, or otherwise used in the further reactions described therein. See column 25, lines 40-46. Condensation or other reaction of the silane functionalized interpolymers with a poly functional linker compound containing two or more groups, independently selected from alcohol, amine, epoxy, peroxide, carboxylic acid, phosphoric acid, boric acid, metal salt derivatives of carboxylic acids, phosphoric acid or boric acid, isocyanate, nitrile, amide, ketone, ester, diazonium (or other carbene forming reagent), alkene, alkyne, and alpha-omega diene groups are also desirably performed. The linker compounds can be large or small and preferably contain from 2 to 100,000 atoms, not counting hydrogen. Depending on the number of =SiH groups per chain and the kind of polyfunctional linker employed, rheology modified polymers, surface modified polymers, crosslinked polymers, and grafted polymers can be obtained. Catalysts such as acids, bases, and transition metals can be used to accelerate the condensation or other reaction. See column 26, lines 27-45. Example 2 discloses copolymers of propylene and allyldimethylsilane (ADMS), as well as polypropylene homopolymer controls, prepared by a by a slurry polymerization and a solution polymerization process (see column 29, lines 13-16).U.S. Patent 1 1,299,613 discloses a peroxide-curable ethylene copolymer composition comprising the following: (A) a crosslinkable ethylene / alpha-olefin copolymer, (B) an effective amount of triallyl phosphate (TAP), (C) an organic peroxide; and, optionally, (D) a supplemental polymer; and wherein the (A) crosslinkable ethylene / alpha-olefin copolymer is made by copolymerizing ethylene and an olefin-functional comonomer in the presence of a molecular catalyst useful therefor. Also provided are a cured product made from the composition, methods of making and using same, and articles containing same. See abstract. The supplemental polymer may be selected from an ethylene / unsaturated carboxylic ester copolymer, a polyethylene homopolymer, a non-(molecular-catalyst)-formed ethylene / alpha- olefin copolymer and a propylene-based polymer (see column 4, lines 34-37). In some aspects the comonomer used to make the (A) crosslinkable ethylene / alpha-olefin copolymer or the (D) supplemental polymer may further include an olefin-functional hydrolyzable silane, such as the hydrolyzable silane monomer of paragraph

[0019] of WO 2016 / 200600 Al (PCT / US 16 / 033879 filed May 24, 2016) to Chaudhary; or of U.S. Pat. No. 5,266,627 toMeverden et al.. The olefin functional hydrolyzable silane may be grafted (post-reactor) onto copolymer (A) or onto supplemental polymer (D). See column 12, lines 46-54.Alternatively, the olefin-functional hydrolyzable silane maybe copolymerized with ethylene, alpha-olefin, and optionally a second comonomer, such as the second alpha-olefin or non- conjugated diene to directly make the (A) crosslinkable ethylene / alpha-olefin copolymer containing hydrolysable silyl groups. Alternatively, the olefin-functional hydrolysable silane may be copolymerized with ethylene and an unsaturated carboxylic ester comonomer to directly make the (D) embodiment crosslinkable ethylene / unsaturated carboxylic ester copolymer containing hydrolyzable silyl groups. See column 12, lines 55-65.U.S. Patent 7,858,705 discloses a process for preparing a functionalized polyolefin, which comprises the step of reacting: (i) a polyolefin, (ii) a compound containing a functional group, and (iii) a coagent compound having Formula I: Xn-Y Zm(I), where Y is a core moiety; Z is a moiety containing a carbon-carbon double bond or a carbon-carbon triple bond; X is a moiety different than Z, and the bond between X and Y may be a single bond or a double bond; n is a whole number greater than, or equal to, 0; m is a whole number greater than, or equal to 2; and m + n equals a number up to the valence of Y ; and wherein: (a) when m is 2 and n is 0, the process comprises initially reacting the polyolefin and the coagent to form a product that is then reacted with the compound containing the functional group, and (b) the compound containing a functional group is substantially inert in free radical-mediated polymerization reactions and in free radical-mediated grafting reactions. See abstract. The polyolefins, particularly high molecular weight polyolefins (Mn >10,000), are disclosed as being able to be extensively modified with functional groups (e.g., thiols, epoxides, anhydrides, carboxylic acids, amines, amides, boron-containing compounds, silicon- containing compounds, cyano-containing compounds, sulfates, sulfonates, sulfites, esters, thioesters, dithioesters, ether, halides, phosphates, phosphonates, phosphines, phosphites and other compounds containing polar moieties), without altering molecular weight, thereby rendering the functionalized polyolefins useful in a wide range of applications. See abstract.Additional functionalized polymers and / or compositions are disclosed in the following references: U.S. Patent 9012563, U.S. Patent 7897689, U.S. Patent 8609779; U.S. Patent 8318864, U.S. Patent 8211982, U.S. Patent 6987149, U.S. Patent 5741858; U.S. Patent 3294869; WO2023 / 108587; EP0073435A2 (machine translation),However, the cited art typically uses coagents and other additives to address the problem of degradation in polypropylene or high propylene content copolymers duringperoxide curing. These are all additive approaches and have no benefits associated with inreactor solutions that give inherent curability. Also, the typical silane grafted POE will need a separate moisture curing step to crosslink the polymer.As discussed above, there remains a need for new propylene-based polymers and compositions that can be effectively reacted with peroxide to form highly crosslinked polymers, and which are not extensively degraded. This need has been met as discussed below.SUMMARY OF THE INVENTIONIn a first aspect, a crosslinked composition formed from a first composition comprising at least one propylene / silane interpolymer, as component a, and at least one peroxide, as component b and wherein the crosslinked composition comprises a gel content > 10 wt%, based on the weight of the crosslinked composition.In a second aspect, a composition comprising, as component z„ at least one propylene / silane interpolymer; and wherein interpolymer comprises, in polymerized form, one of the following i) through iii): i) ethylene in an amount < 25 wt%, based on the weight of the interpolymer; or ii) an alpha-olefin in an amount < 25 wt%, based on the weight of the interpolymer; or iii) ethylene and an alpha-olefin, where the combined amount of both is in an amount < 25 wt%, based on the weight of the interpolymer; and wherein interpolymer comprises, in polymerized form, > 75 wt% propylene, based on the weight of the interpolymer.DETAILED DRESCRIPTION OF THE INVENTIONPropylene / silane interpolymers have been unexpectedly discovered that can be fully crosslinked, with > 50 wt% gel content, and without significant polymer degradation. It was discovered that these interpolymers can be effectively cured with peroxide, and the degradation reactions specific to the propylene monomer are significantly reduced. These interpolymers and compositions containing the same, open new application spaces, which were previously limited because of the curing limitations on propylene-based polymers.Also, the propylene / silane interpolymers can be crosslinked directly with peroxide, and no longer require a separate moisture curing step.As discussed, in a first aspect, a crosslinked composition is provided as discussed above. Also, in a second aspect, a composition is provided as discussed above.Each composition may independently comprise a combination of two or more embodiments, each as described herein. Each component of each composition may independently comprise a combination of two or more embodiments, each as described herein. As used herein, in regard to the sub structures of Formula 1, R1 = R1and R2 = R2. Also, in regard to the number of carbon atoms in a chemical substituent, the notation, for example, “C1-C5,” where “1 through 5” represents consecutive numbers from 1 to 5, refers to “from 1 to 5 carbon atoms” that may be present in the substituent. An “alkyl” group may be linear, branched, cyclic, or any combination thereof. An “alkenyl” group may be linear, branched, cyclic, or any combination thereof.In one embodiment or a combination of two or more embodiments, each described herein, the at least one propylene / silane interpolymer of component a is a propylene / ethylene / silane interpolymer or a propylene / alpha-olefin / silane interpolymer; and further a propylene / ethylene / silane interpolymer.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a comprises, in polymerized form, > 60 wt%, or > 65 wt%, or > 70 wt%, > 72 wt%, or > 75 wt%, or > 78 wt%, or > 80 wt%, or > 82 wt% of propylene, based on the weight of the interpolymer. In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a comprises, in polymerized form, < 99 wt%, or < 98 wt%, or < 96 wt%, or < 94 wt%, or < 92 wt%, or < 91 wt%, or < 90 wt%, or < 89 wt%, or < 88 wt% of propylene, based on the weight of the interpolymer.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a comprises, in polymerized form, > 0.10 wt%, or > 0.20 wt%, or > 0.50 wt%, > 0.80 wt%, or > 1.0 wt%, or > 1.2 wt%, or > 1.4 wt%, or > 1.6 wt%, or > 1.8 wt%, or > 2.0 wt%, or > 2.1 wt%, or > 2.2 wt% of the silane, based on the weight of the interpolymer. In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a comprises, in polymerized form, < 10 wt%, or < 9.0 wt%, or < 8.0 wt%, or < 7.0 wt%, or < 6.0 wt%, or < 5.5 wt%, or < 5.0 wt%, or < 4.5 wt%, or < 4.0 wt%, or < 3.5 wt%, or < 3.0 wt% of thesilane, based on the weight of the interpolymer.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a has melting point (Tm) < 80°C, or < 75°C, or < 70°C, or < 68°C, or < 66°C, or < 64°C, or < 62°C, or < 60°C, or < 59°C, or < 58 °C, as determined by DSC.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a has a weight average molecular weight (Mw) > 180,000, or > 190,000, or > 200,000, or > 205,000, or > 210,000, or > 215,000 g / mol.In one embodiment or a combination of two or more embodiments, each described herein, the at least one propylene / silane interpolymer of component z is a propylene / ethylene / silane interpolymer or a propylene / alpha-olefin / silane interpolymer; and further a propylene / ethylene / silane interpolymer.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component z comprises, in polymerized form, > 0.10 wt%, or > 0.20 wt%, or > 0.50 wt%, > 0.80 wt%, or > 1.0 wt%, or > 1.2 wt%, or > 1.4 wt%, or > 1.6 wt%, or > 1.8 wt%, or > 2.0 wt%, or > 2.1 wt%, or > 2.2 wt% of the silane, based on the weight of the interpolymer. In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component z comprises, in polymerized form, < 10 wt%, or < 9.0 wt%, or < 8.0 wt%, or < 7.0 wt%, or < 6.0 wt%, or < 5.5 wt%, or < 5.0 wt%, or < 4.5 wt%, or < 4.0 wt%, or < 3.5 wt%, or < 3.0 wt% of the silane, based on the weight of the interpolymer.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component z has melting point (Tm) < 80°C, or < 75°C, or < 70°C, or < 68°C, or < 66°C, or < 64°C, or < 62°C, or < 60°C, or < 59°C, or < 58°C, as determined by DSC.In one embodiment or a combination of two or more embodiments, each described herein, the at least one interpolymer of component z has a weight average molecular weight (Mw) or > 180,000, or > 190,000, or > 200,000, or > 205,000, or > 210,000, or > 215,000 g / mol.Also provided is a crosslinked composition formed from a composition of the embodiment or a combination of two or more embodiments, each described herein.The following embodiments apply to both the first aspect and second aspect (where noted, the crosslinked composition formed from the composition), unless otherwise noted.In one embodiment or a combination of two or more embodiments, each described herein, the crosslinked composition has a gel content > 20 wt%, or > 30 wt%, or > 40 wt%, or > 50 wt%, or > 60 wt% or > 70 wt%, or > 75 wt%, based on the weight of the crosslinked composition.In one embodiment or a combination of two or more embodiments, each described herein, the crosslinked composition has a (MH-ML) value, at 180°C, > 0.90, or > 0.95, or > 1 .00, or > 1 .05, or > 1 . 10 dN*m.In one embodiment or a combination of two or more embodiments, each described herein, the silane of the at least one propylene / silane interpolymer of component a, and the silane of the at least one propylene / silane interpolymer of component z, are each independently derived from a silane monomer selected from Formula 1 :A-(SiBC-O)x-Si-EFH (Formula 1), where A is an alkenyl group;B is a hydrocarbyl group or hydrogen, C is a hydrocarbyl group or hydrogen, and where B and C may be the same or different;H is hydrogen, and x > 0;E is a hydrocarbyl group or hydrogen, F is a hydrocarbyl group or hydrogen, and where E and F may be the same or different. In one embodiment or a combination of two or more embodiments, each described herein, Formula 1 is selected from compounds si) through si 6), each as described herein.Also provided is an article comprising at least one component formed from the crosslinked composition of an embodiment or a combination of two or more embodiments, each described herein.Also provided is an article comprising at least one component formed from the composition of an embodiment or a combination of two or more embodiments, each described herein.Also provided is a method of forming a crosslinked composition, said method comprising mixing the composition of an embodiment or a combination of two or more embodiments, each described herein.Peroxides (Component c)As used herein, a peroxide contains at least one oxygen-oxygen bond (O-O). Peroxides include, but are not limited to, dialkyl, diaryl, dialkaryl, or diaralkyl peroxide,having the same or differing respective alkyl, aryl, alkaryl, or aralkyl moieties, and further each dialkyl, diaryl, dialkaryl, or diaralkyl peroxide, having the same respective alkyl, aryl, alkaryl, or aralkyl moieties.Exemplary organic peroxides include dicumyl peroxide ("DCP"); tert-butyperoxy- benzoate; di-tert-amyl peroxide ("DTAP"); bis(t-butyl-peroxy isopropyl) benzene ("BIPB"); isopropylcumyl t-butyl peroxide; t-butylcumylperoxide; di-t-butyl peroxide; 2,5-bis(t- butylperoxy)-2,5-dimethylhexane; 2,5-bis(t-butylperoxy)-2,5-dimethylhexyne-3; 1 ,1 -bis(t- butyl-peroxy)-3,3,5-trimethylcyclohexane; isopropylcumyl cumylperoxide; buty-1 4,4-di(tert- butylperoxy)valerate; di(isopropylcumyl) peroxide; 1 ,l-di-(tert-butylperoxy)-cyclohexane ("LUPEROX 331"); l,l-di-(tert-amylperoxy)cyclohexane ("LUPEROX 531"); tertbutylperoxyacetate ("TBPA"); tert-amyl peroxyacetate ("TAPA"); 2,5-dimethyl-2,5-di(tert- butylperoxy)hexane ("LUPEROX 101"); tert-butylperoxy-2-ethylhexyl carbonate ("TBEC"); and mixtures of two or more thereof.The peroxide may be a cyclic peroxide. Examples of cyclic peroxides include those derived from acetone, methylamyl ketone, methylheptyl ketone, methylhexyl ketone, methylpropyl ketone, methylbutyl ketone, diethyl ketone, methylethyl ketone, methyloctyl ketone, methylnonyl ketone, methyldecyl ketone, methylundecyl ketone and combinations thereof, among others. The cyclic peroxides can be used alone or in combination with one another. A number of cyclic peroxides are commercially available, for example, under the tradename TRIGONOX, such as 3,6,9-triethyl-3,6,9-trimethyl-l,4,7-triperoxonane.AdditivesAn inventive composition may comprise one or more additives. Additives include, but are not limited to, UV stabilizers, antioxidants, fillers, scorch retardants, tackifiers, waxes, compatibilizers, adhesion promoters, plasticizers, blocking agents, antiblocking agents, anti-static agents, release agents, anti-cling additives, colorants, dyes, pigments, crosslinking coagents, and combination thereof.As used herein, a “crosslinking coagent” is a compound that promotes crosslinking; for example, by helping to establish a higher concentration of reactive sites and / or helping to reduce the chance of deleterious radical side reactions. Crosslinking coagents include, but are not limited to, triallyl cyanurate (TAC), triallyl phosphate (TAP), triallyl isocyanurate (TAIC), l,3,5,7-tetravinyl-l,3,5,7-tetramethylcyclotetrasiloxane (vinyl D4), dipentaerythritol pentaacrylate and trimethylolpropane triacrylate.DEFINITIONSUnless stated to the contrary, implicit from the context, or customary in the art, all parts and percentages are based on weight, and all test methods are current as of the filing date of this disclosure.The term "composition," as used herein, includes a mixture of materials, which comprise the composition, as well as reaction products and decomposition products formed from the materials of the composition. Any reaction product or decomposition product is typically present in trace or residual amounts.The term "polymer," as used herein, refers to a polymeric compound prepared by polymerizing monomers, whether of the same or a different type. The generic term polymer thus includes the term homopolymer (employed to refer to polymers prepared from only one type of monomer, with the understanding that trace amounts of impurities can be incorporated into the polymer structure), and the term interpolymer as defined hereinafter. Trace amounts of impurities, such as catalyst residues, can be incorporated into and / or within the polymer. Typically, a polymer is stabilized with very low amounts (“ppm” amounts) of one or more stabilizers, such as one or more antioxidants.The term "interpolymer," as used herein, refers to a polymer prepared by the polymerization of at least two different types of monomers. The term interpolymer thus includes the term copolymer (employed to refer to polymers prepared from two different types of monomers) and polymers prepared from more than two different types of monomers.The term “olefin-based polymer,” as used herein, refers to a polymer that comprises, in polymerized form, 50 wt% or a majority weight percent of an olefin, such as ethylene or propylene (based on the weight of the polymer), and optionally may comprise one or more comonomers.The term "propylene-based polymer," as used herein, refers to a polymer that comprises, in polymerized form, a majority weight percent of propylene (based on the weight of the polymer), and optionally may comprise one or more comonomers.The term "ethylene-based polymer," as used herein, refers to a polymer that comprises, in polymerized form, 50 wt% or a majority weight percent of ethylene (based on the weight of the polymer), and optionally may comprise one or more comonomers.The term propylene / silane interpolymer," as used herein, refers to an interpolymer that comprises, in polymerized form, a majority weight percent of propylene (based on the weight of the interpolymer), and a silane monomer. The silane monomer is randomlydistributed within the interpolymer. The propylene / silane interpolymer is formed by the copolymerization of at least the propylene and the silane monomer. An example of a silane monomer is depicted in Formula 1 , as described herein.The term "propylene / ethylene / silane interpolymer," as used herein, refers to an interpolymer that comprises, in polymerized form, a majority weight percent of propylene (based on the weight of the interpolymer), ethylene, and a silane monomer. The ethylene and silane monomer are randomly distributed within the interpolymer. The propylene / ethylene / - silane interpolymer is formed by the copolymerization of at least the propylene, ethylene and the silane monomer. An example of a silane monomer is depicted in Formula 1 , as described herein. The term "propylene / alpha-olefin / silane interpolymer," is similarly defined.The term "propylene / ethylene / silane terpolymer," as used herein, refers to a terpolymer that comprises, in polymerized form, a majority weight percent of propylene (based on the weight of the terpolymer), ethylene, and a silane monomer as the only three monomer types. The ethylene and silane monomer are randomly distributed within the terpolymer. The propylene / ethylene / silane terpolymer is formed by the copolymerization of the propylene, ethylene and the silane monomer, as the only three monomer types. An example of a silane monomer is depicted in Formula 1 , as described herein. The term "propylene / alpha-olefin / silane terpolymer," is similarly defined.The phrase “a majority weight percent,” as used herein, in reference to a polymer (or interpolymer, terpolymer or copolymer), refers to the amount of monomer (in polymerized form) present in the greatest amount in the polymer.The term "heteroatom," as used herein, refers to an atom other than hydrogen or carbon (for example, O, S, N or P). The term "heteroatom group" refers to a heteroatom or a chemical group containing one or more heteroatoms.The terms "hydrocarbon," "hydrocarbyl," and similar terms, as used herein, refer to a respective compound or chemical group, etc., containing only carbon and hydrogen atoms. A divalent "hydrocarbylene group" is defined in similar manner.The terms “silane,” “silane monomer,” “silane compound,” or similar terms, as used herein, refer to an organic compound comprising at least one SiH group. Typically the molecular weight of such a compound is < 1000 g / mol.The terms “thermally treating,” “thermally treated,” “thermal treatment,” and similar terms, as used herein, in reference to, for example, a composition comprising an propylene / silane interpolymer as discussed herein, refer to increasing the temperature of thecomposition by the application of heat. As an example, heat may be applied by electrical means (for example, a heating coil) and / or by radiation and / or by hot oil and / or by mechanical shearing. Note, the temperature at which the thermal treatment takes place, refers to the temperature of the “heat- applying” device, or, if the device contains an enclosed or semi-enclosed atmosphere, the temperature of the atmosphere within the device, such as, for example, the atmosphere within an oven or a tunnel (for example, the air temperature in an hot air oven or a hot air tunnel).The term "alkenyl group," as used herein, refers to an organic chemical group that contains at least one carbon-carbon double bond (C=C). In a preferred embodiment, the alkenyl group is a hydrocarbon group containing at least one carbon-carbon double bond, and further containing only one carbon-carbon double bond.The terms "substituted aryl," "substituted aryl group," and similar terms, as used herein, refer to an aryl group, etc., in which one or more hydrogen atoms is / are independently substituted with a heteroatom group.The term “crosslinked composition,” and similar terms, as used herein, refer to a composition that has a network structure due to the formation of chemical bonds between polymer chains. The degree of formation of this network structure is indicated by an increase in the “MH-ML” differential, typically relative to the non-crosslinked composition. See test method section (MDR).The terms "comprising," "including," "having," and their derivatives, are not intended to exclude the presence of any additional component, step or procedure, regardless of whether the same is specifically disclosed. In order to avoid any doubt, all compositions claimed through use of the term “comprising” may include any additional additive, adjuvant, or compound, whether polymeric or otherwise, unless stated to the contrary. In contrast, the term, “consisting essentially of” excludes from the scope of any succeeding recitation any other component, step or procedure, excepting those that are not essential to operability. The term “consisting of” excludes any component, step or procedure, not specifically delineated or listed.Listing of Some Composition and Process FeaturesA] A crosslinked composition formed from a first composition comprising at least one propylene / silane interpolymer, as component a, and at least one peroxide, as component £>; andwherein the crosslinked composition comprises a gel content > 10 wt%, based on the weight of the crosslinked composition.B] The crosslinked composition of A] above, wherein the at least one propylene / silane interpolymer of component a is a propylene / ethylene / silane interpolymer or a propylene / alpha-olefin / silane interpolymer; and further a propylene / ethylene / silane interpolymer.C] The crosslinked composition of A] or B] above, wherein the at least one propylene / silane interpolymer of component a is a propylene / ethylene / silane terpolymer or a propylene / alpha-olefin / silane terpolymer; and further a propylene / ethylene / silane terpolymer.D] The crosslinked composition of B] or C] above, wherein the alpha-olefin of the propylene / alpha-olefin / silane interpolymer, or terpolymer, is a C4-C20 alpha-olefin, and further a C4-C10 alpha-olefin, and further a C4-C8 alpha-olefin.E] The crosslinked composition of any one of B]-D] (B] through D]) above, wherein the alpha-olefin of the propylene / alpha-olefin / silane interpolymer, or terpolymer, is selected from 1 -butene, 1 -hexene or 1 -octene, further 1 -butene, or 1 -octene, further 1 -octene.F] The crosslinked composition of any one of A]-E] above, wherein the first composition comprises two or more propylene / silane interpolymers as component a further two or more propylene / ethylene / silane interpolymers or terpolymers, or two or more propylene / alpha- olefin / silane interpolymers or terpolymers, as component u; further two or more propylene / ethylene / silane interpolymers or terpolymers as component a.G] The crosslinked composition of any one of A]-F] above, wherein the first composition comprises two propylene / silane interpolymers as component cr, further two propylene / ethylene / silane interpolymers or terpolymers, or two propylene / alpha-olefin / silane interpolymers or terpolymers, as component a further two propylene / ethylene / silane interpolymers or terpolymers as component a.H] The crosslinked composition of any one of A]-E] above, wherein the first composition comprises only one propylene / silane interpolymer as component a; further only one propylene / ethylene / silane interpolymer or terpolymer, or only one propylene / alpha- olefin / silane interpolymer or terpolymer, as component a; further only one propylene / ethylene / silane interpolymer or terpolymer as component a.I] The crosslinked composition of any one of A]-H] above, wherein the at least one interpolymer of component a comprises, in polymerized form, > 0 wt%, or > 0.5 wt%, or > 1.0 wt%, > 2.0 wt%, or > 3.0 wt%, or > 4.0 wt%, or > 5.0 wt%, or > 6.0 wt%, or > 7.0 wt%,or > 8.0 wt% of ethylene, based on the weight of the interpolymer.J] The crosslinked composition of any one of AJ-I] above, wherein the at least one interpolymer of component a comprises, in polymerized form, < 40 wt%, or < 35 wt%, or < 30 wt%, or < 25 wt%, or < 20 wt%, or < 18 wt%, or < 16 wt% of ethylene, based on the weight of the interpolymer.K] The crosslinked composition of any one of A]-H] above, wherein the at least one interpolymer of component a comprises, in polymerized form, > 0 wt%, or > 0.5 wt%, or > 1.0 wt%, > 2.0 wt%, or > 3.0 wt%, or > 4.0 wt%, or > 5.0 wt%, or > 6.0 wt%, or > 7.0 wt%, or > 8.0 wt% of alpha-olefin, based on the weight of the interpolymer.L] The crosslinked composition of any one of A]-H] or K] above, wherein the at least one interpolymer of component a comprises, in polymerized form, < 40 wt%, or < 35 wt%, or < 30 wt%, or < 25 wt%, or < 20 wt%, or < 18 wt%, or < 16 wt% of alpha-olefin, based on the weight of the interpolymer.M] The crosslinked composition of any one of A]-L] above, wherein the at least one interpolymer of component a comprises, in polymerized form, > 60 wt%, or > 65 wt%, or > 70 wt%, > 72 wt%, or > 75 wt%, or > 78 wt%, or > 80 wt%, or > 82 wt% of propylene, based on the weight of the interpolymer.N] The crosslinked composition of any one of A]-M] above, wherein the at least one interpolymer of component a comprises, in polymerized form, < 99 wt%, or < 98 wt%, or < 96 wt%, or < 94 wt%, or < 92 wt%, or < 91 wt%, or < 90 wt%, or < 89 wt%, or < 88 wt% of propylene, based on the weight of the interpolymer.O] The crosslinked composition of any one of A]-N] above, wherein the at least one interpolymer of component a comprises, in polymerized form, > 0. 10 wt%, or > 0.20 wt%, or > 0.50 wt%, > 0.80 wt%, or > 1.0 wt%, or > 1.2 wt%, or > 1.4 wt%, or > 1.6 wt%, or > 1.8 wt%, or > 2.0 wt%, or > 2.1 wt%, or > 2.2 wt% of the silane, based on the weight of the interpolymer.P] The crosslinked composition of any one of A]-O] above, wherein the at least one interpolymer of component a comprises, in polymerized form, < 10 wt%, or < 9.0 wt%, or < 8.0 wt%, or < 7.0 wt%, or < 6.0 wt%, or < 5.5 wt%, or < 5.0 wt%, or < 4.5 wt%, or < 4.0 wt%, or < 3.5 wt%, or < 3.0 wt% of the silane, based on the weight of the interpolymer.Q] The crosslinked composition of any one of A]-P] above, wherein the at least one interpolymer of component a has melting point (Tm) > 50°C, or > 51 °C, or > 52°C, or > 53°C, or > 54°C, or > 55°C and / or < 130°C, or < 120°C, or < 110°C, or < 100°C, or < 90°C,or < 85°C, or < 80°C, or < 78°C, or < 76°C, or < 74°C, or < 72°C, or < 70°C, as determined by DSC.R] The crosslinked composition of any one of A]-P] above, wherein the at least one interpolymer of component a has melting point (Tm) > 40°C, or > 42°C, or > 45°C, or > 48°C, or > 50°C, or > 51°C, or > 52°C, or > 53°C, as determined by DSC.S] The crosslinked composition of any one of A]-R] above, wherein the at least one interpolymer of component a has melting point (Tm) < 125°C, or < 122°C, or < 120°C, or <118°C, or < 116°C, or < 114°C, or < 112°C, or < 110°C, or < 100°C, or < 95°C, or < 90°C, or < 85°C, as determined by DSC.T] The crosslinked composition of any one of A]-S] above, wherein the at least one interpolymer of component a has melting point (Tm) < 80°C, or < 75°C, or < 70°C, or < 68°C, or < 66°C, or < 64°C, or < 62°C, or < 60°C, or < 59°C, or < 58°C, as determined by DSC.U] The crosslinked composition of any one of A]-T] above, wherein the at least one interpolymer of component a has a weight average molecular weight (Mw) > 50,000, or > 80,000, or > 100,000, or > 120,000, or > 140,000, or > 160,000, or > 170,000 g / mol.V] The crosslinked composition of any one of A]-U] above, wherein the at least one interpolymer of component a has a weight average molecular weight (Mw) > 180,000, or > 190,000, or > 200,000, or > 205,000, or > 210,000, or > 215,000 g / mol.W] The crosslinked composition of any one of A]-V] above, wherein the at least one interpolymer of component a has a weight average molecular weight (Mw) < 500,000, or < 450,000, or < 400,000, or < 380,000, or < 360,000, or < 350,000, or < 345,000, or < 340,000, or < 335,000 g / mol.X] The crosslinked composition of any one of AJ-WJ above, wherein the at least one interpolymer of component a has a molecular weight distribution (MWD = Mw / Mn) > 1.8, or > 2.0, or > 2.2, or > 2.4, or > 2.5 and / or < 5.0, or < 4.5, or < 4.0, or < 3.8, or < 3.6, or < 3.4, or < 3.2, or < 3.0, or < 2.8.Y] The crosslinked composition of any one of A]-X] above, wherein the first composition comprises two or more peroxides as component b.Z] The crosslinked composition of any one of A]-Y] above, wherein the first composition comprises two peroxides as component b.A2] The crosslinked composition of any one of A]-X] above, wherein the first composition comprises only one peroxide as component b.B2] The crosslinked composition of any one of A]-A2] above, wherein the at least one peroxide is selected from Formula P:(Formula P), where R1 is a substituted or unsubstituted aryl group;R4 is a substituted or unsubstituted aryl group; R2, R3, R5 and R6 are each, independently, alkyl or H; or a C1-C5 alkyl or H; or methyl or H.C2] The crosslinked composition of B2] above, wherein, for Formula P, R1 is an unsubstituted aryl group, and further phenyl; and R4 is an unsubstituted aryl group, and further phenyl.D2] The crosslinked composition of any one of A]-C2] above, wherein component b is di- cumylperoxide:E2] The crosslinked composition of any one of A]-D2] above, wherein the first composition comprises > 0.10, or > 0.15, or > 0.20, or > 0.25, or > 0.30, or > 0.35, or > 0.40, or > 0.45, or > 0.47, or > 0.50 phr of component b, based on 100 parts of component a.F2] The crosslinked composition of any one of A]-E2] above, wherein the first composition comprises < 5.0, or < 4.5, or < 4.0, or < 3.5, or < 3.0, or < 2.8, or < 2.7, or < 2.6, or < 2.5, or < 2.4 or < 2.3, or < 2.2, or < 2.1, or < 2.0 phr of component b, based on 100 parts of component a.G2] The crosslinked composition of any one of A]-F2] above, wherein first composition comprises > 90.0 wt%, or > 92.0 wt%, or > 94.0 wt%, or > 96.0 wt%, or > 97.0 wt% or > 97.5 wt%, or > 98.0 wt%, or > 98.5 wt%, or > 99.0 wt% of component a based on the weight of the first composition.H2] The crosslinked composition of any one of A]-G2] above, wherein the first composition comprises < 100 wt%, or < 99.9 wt%, or < 99.8 wt%, or < 99.5 wt% of component a based on the weight of the first composition.12] The crosslinked composition of any one of A]-H2] above, wherein the first composition comprises > 90.0 wt%, or > 92.0 wt%, or > 94.0 wt%, or > 96.0 wt%, or > 98.0 wt%, or > 99.0 wt% and / or < 100.0 wt%, or < 99.9 wt%, or < 99.8 wt% of the sum of component a and component b based on the weight of the first composition.J2] The crosslinked composition of any one of AJ-I2] above, wherein the weight ratio ofcomponent a to component b is > 30, or > 35, or > 40, or > 45, or > 50, or > 55, or > 60 and / or < 500, or < 450, or < 300, or < 350, or < 300, or < 280, or < 250, or < 220, or < 210, or < 200.A3] A composition comprising, as component z, at least one propylene / silane interpolymer; and wherein interpolymer comprises, in polymerized form, one of the following i) through iii): i) ethylene in an amount < 25 wt%, based on the weight of the interpolymer; or ii) an alpha-olefin in an amount < 25 wt%, based on the weight of the interpolymer; or iii) ethylene and an alpha-olefin, where the combined amount of both is in an amount < 25 wt%, based on the weight of the interpolymer; and wherein interpolymer comprises, in polymerized form, > 75 wt% propylene, based on the weight of the interpolymer.B3] The composition of A31 above, wherein the at least one propylene / silane interpolymer of component z is a propylene / ethylene / silane interpolymer or a propylene / alpha-olefin / silane interpolymer; and further a propylene / ethylene / silane interpolymer.C3] The composition of A3] or B3] above, wherein the at least one propylene / silane interpolymer of component z is a propylene / ethylene / silane terpolymer or a propylene / alpha- olefin / silane terpolymer; and further a propylene / ethylene / silane terpolymer.D3] The composition of any one of A3]-C3] above, wherein the alpha-olefin is a C4-C20 alpha-olefin, and further a C4-C10 alpha-olefin, and further a C4-C8 alpha-olefin.E3] The composition of any one of A3]-D3] above, wherein the alpha-olefin is selected from 1 -butene, 1 -hexene or 1 -octene, further 1 -butene, or 1 -octene, further 1 -octene.F3] The composition of any one of A3]-E3] above, wherein the composition comprises two or more propylene / silane interpolymers as component z', further two or more propylene / ethylene / silane interpolymers or terpolymers, or two or more propylene / alpha- olefin / silane interpolymers or terpolymers, as component z\ further two or more propylene / ethylene / silane interpolymers or terpolymers as component z.G3] The composition of any one of A3]-F3] above, wherein the composition comprises two propylene / silane interpolymers as component z; further two propylene / ethylene / silane interpolymers or terpolymers, or two propylene / alpha-olefin / silane interpolymers or terpolymers, as component z; further two propylene / ethylene / silane interpolymers orterpolymers as component z-H3] The composition of any one of A3]-E3] above, wherein the composition comprises only one propylene / silane interpolymer as component z further only one propylene / ethylene / silane interpolymer or terpolymer, or only one propylene / alpha- olefin / silane interpolymer or terpolymer, as component z; further only one propylene / ethylene / silane interpolymer or terpolymer as component z-13] The composition of any one of A3]-H3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, > 0 wt%, or > 0.5 wt%, or > 1.0 wt%, > 2.0 wt%, or > 3.0 wt%, or > 4.0 wt%, or > 5.0 wt%, or > 6.0 wt%, or > 7.0 wt%, or > 8.0 wt% of ethylene, based on the weight of the interpolymer.J3] The composition of any one of A3J-I3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, < 24 wt%, or < 22 wt%, or < 20 wt%, or < 18 wt%, or < 16 wt% of ethylene, based on the weight of the interpolymer.K3] The composition of any one of A3]-H3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, > 0 wt%, or > 0.5 wt%, or > 1.0 wt%, > 2.0 wt%, or > 3.0 wt%, or > 4.0 wt%, or > 5.0 wt%, or > 6.0 wt%, or > 7.0 wt%, or > 8.0 wt% of the alpha-olefin, based on the weight of the interpolymer.L3] The composition of any one of A3]-H3] or K3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, < 24 wt%, or < 22 wt%, or < 20 wt%, or < 18 wt%, or < 16 wt% of the alpha-olefin, based on the weight of the interpolymer.M3] The composition of any one of A3]-L3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, > 76 wt%, or > 78 wt%, or > 80 wt%, or > 82 wt% of propylene, based on the weight of the interpolymer.N3] The composition of any one of A3]-M3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, < 99 wt%, or < 98 wt%, or < 96 wt%, or < 94 wt%, or < 92wt%, or < 91 wt%, or < 90 wt%, or < 89 wt%, or < 88 wt% of propylene, based on the weight of the interpolymer.03] The composition of any one of A3]-N3] above, wherein the at least one interpolymer of component z comprises, in polymerized form, > 0.10 wt%, or > 0.20 wt%, or > 0.50 wt%, > 0.80 wt%, or > 1.0 wt%, or > 1.2 wt%, or > 1.4 wt%, or > 1.6 wt%, or > 1.8 wt%, or > 2.0 wt%, or > 2. 1 wt%, or > 2.2 wt% of the silane, based on the weight of the interpolymer.P3] The composition of any one of A3] -03] above, wherein the at least one interpolymerof component z comprises, in polymerized form, < 10 wt%, or < 9.0 wt%, or < 8.0 wt%, or < 7.0 wt%, or < 6.0 wt%, or < 5.5 wt%, or < 5.0 wt%, or < 4.5 wt%, or < 4.0 wt%, or < 3.5 wt%, or < 3.0 wt% of the silane, based on the weight of the interpolymer.Q3] The composition of any one of A3]-P3] above, wherein the at least one interpolymer of component z has melting point (Tm) > 50°C, or > 51 °C, or > 52°C, or > 53°C, or > 54°C, or > 55°C and / or < 130°C, or < 120°C, or < 110°C, or < 100°C, or < 90°C, or < 85°C, or < 80°C, or < 78°C, or < 76°C, or < 74°C, or < 72°C, or < 70°C as determined by DSC.R3] The composition of any one of A3]-P3] above, wherein the at least one interpolymer of component z has melting point (Tm) > 40°C, or > 42°C, or > 45°C, or > 48°C, or > 50°C, or > 51 °C, or > 52°C, or > 53°C, as determined by DSC.S3] The composition of any one of A3]-R3] above, wherein the at least one interpolymer of component z has melting point (Tm) < 125°C, or < 122°C, or < 120°C, or < 118°C, or < 116°C, or < 114°C, or < 112°C, or < 110°C, or < 100°C, or < 95°C, or < 90°C, or < 85°C, as determined by DSC.T3] The composition of any one of A3 ] -S 31 above, wherein the at least one interpolymer of component z has melting point (Tm) < 80°C, or < 75°C, or < 70°C, or < 68°C, or < 66°C, or < 64°C, or < 62°C, or < 60°C, or < 59°C, or < 58°C, as determined by DSC.U3] The composition of any one of A3]-T3] above, wherein the at least one interpolymer of component z has a weight average molecular weight (Mw) > 50,000, or > 80,000, or > 100,000, or > 120,000, or > 140,000, or > 160,000, or > 170,000 g / mol.V3] The composition of any one of A3]-U3] above, wherein the at least one interpolymer of component z has a weight average molecular weight (Mw) > 180,000, or > 190,000, or > 200,000, or > 205,000, or > 210,000, or > 215,000 g / mol.W3] The composition of any one of A3J-V3J above, wherein the at least one interpolymer of component z has a weight average molecular weight (Mw) < 500,000, or < 450,000, or < 400,000, or < 380,000, or < 360,000, or < 350,000, or < 345,000, or < 340,000, or < 335,000 g / mol.X3] The composition of any one of A3]-W3] above, wherein the at least one interpolymer of component z has a molecular weight distribution (MWD = Mw / Mn) > 1.8, or > 2.0, or > 2.2, or > 2.4, or > 2.5 and / or < 5.0, or < 4.5, or < 4.0, or < 3.8, or < 3.6, or < 3.4, or < 3.2, or < 3.0, or < 2.8.A4] The crosslinked composition of any one of A]-J2] above, or the composition of anyone of A3]-X3] above, wherein the first composition or the composition, respectively, comprises < 1.0 wt%, or < 0.50 wt%, or < 0.20 wt%, or < 0.10 wt%, or < 0.05 wt%, or < 0.02 wt%, or < 0.01 wt% of an epoxy compound, based on the weight of the respective composition; and further the respective composition does not comprise an epoxy compound, which is a compound comprising at least one epoxy group.B4] The crosslinked composition of any one of A]-J2] or A4] above, or the composition of any one of A3]-X3], or A4] above, wherein the first composition or the composition, respectively, comprises < 1.0 wt%, or < 0.50 wt%, or < 0.20 wt%, or < 0.10 wt%, or < 0.05 wt%, or < 0.02 wt%, or < 0.01 wt% of an epoxy-silane compound, based on the weight of the respective composition; and further the respective composition does not comprise an epoxysilane compound, which is a compound comprising at least one epoxy group and at least one silane group.C4] The crosslinked composition of any one of A]-J2], A4] or B4] above, or the composition of any one of A3]-X3], A4] or B4] above, wherein the first composition or the composition, respectively, comprises < 1.0 wt%, or < 0.50 wt%, or < 0.20 wt%, or < 0.10 wt%, or < 0.05 wt%, or < 0.02 wt%, or < 0.01 wt% of an anhydride functionalized polymer, based on the weight of the respective composition; and further the respective composition does not comprise an anhydride functionalized polymer, which is a polymer comprising at least one anhydride group.D4] The crosslinked composition of any one of A]-J2] or A4]-C4] above, or the composition of any one of A3]-X3] or A4]-C4] above, wherein the first composition or the composition, respectively, comprises < 1.0 wt%, or < 0.50 wt%, or < 0.20 wt%, or < 0.10 wt%, or < 0.05 wt%, or < 0.02 wt%, or < 0.01 wt% of a “compound comprising a S-OR bond, where R is an alkyl,” based on the weight of the respective composition; and further the respective composition does not comprise a “compound comprising a S-OR bond, where R is an alkyl,”E4] The crosslinked composition of any one of A]-J2] or A4]-D4] above, or the composition of any one of A3]-X3] or A4]-D4] above, wherein the first composition or the composition, respectively, further comprises a polymer, different from component a or component z, respectively, in one or more features, such as monomer(s) types, monomer distributions, Tm, Mw, Mn, Mw / Mn or any combination thereof.F4] The crosslinked composition of any one of A]-J2] or A4]-E4] above, or the composition of any one of A3]-X3] or A4]-E4] above, wherein the first composition or thecomposition, respectively, further comprises at least one additive.G4] The crosslinked composition of F4] above, or the composition of F4] above, wherein the at least one additive is selective from UV stabilizers, antioxidants, fillers, scorch retardants, compatibilizers, adhesion promoters, plasticizers, blocking agents, antiblocking agents, colorants, dyes, pigments, flame retardants, or combinations thereof; and further selective from UV stabilizers, antioxidants, fillers, scorch retardants, compatibilizers, plasticizers, or combinations thereof.H4] The crosslinked composition of F4] or G4] above, or the composition of F4] or G4] above, wherein the at least one additive is present in an amount > 0.05 wt%, or > 0.10 wt%, or > 0.20 wt%, or > 0.30 wt%, or > 0.40 wt%, or > 0.50 wt% and / or < 10 wt%, or < 5.0 wt%, or < 2.0 wt%, or < 1.8 wt%, or < 1.5 wt%, or < 1.2 wt%, or < 1.0 wt%, or < 0.90 wt%, or < 0.80wt%, or < 0.70 wt%, or < 0.60 wt%, based on the weight of the respective composition.14] A crosslinked composition formed from the composition of any one of A3]-X3] or A4|-H4| above.J4] The crosslinked composition of any one of A]-J2] or A4]-I4] above, wherein the crosslinked composition comprises at least one structure selected from the following ic) through vc): ic)(Structure Cl), where R and R’ are each independently H or an alkyl, and each^ nnr independently represents a portion of a crosslinked propylene / silane interpolymer; iic)(Structure C2), where R and R’ are each independently H or an alkyl, and each' / x / v' independently represents a portion of a crosslinked propylene / silane interpolymer;iiic)(Structure C3), where R, R’, R” and R’” are each independently H or an alkyl, and each ' / vw* independently represents a portion of a crosslinked propylene / silane interpolymer; or ivc)(Structure C4), where R and R’ are each independently H or an alkyl, and each' / w' independently represents a portion of a crosslinked propylene / silane interpolymer; or vc) any combination of Structure Cl through Structure C4 (for example, Structure Cl and Structure C2; or Structure Cl and Structure C3 and Structure C4; or other combinations). K4] The crosslinked composition of any one of A]-J2] or A4]-J4] above, wherein the crosslinked composition has a gel content > 20 wt%, or > 30 wt%, or > 40 wt%, or > 50 wt%, or > 60 wt% or > 70 wt%, or > 75 wt%, based on the weight of the crosslinked composition. L4] The crosslinked composition of any one of A]-J2] or A4]-K4] above, wherein the crosslinked composition has a gel content > 80 wt%, or > 82 wt%, or > 84 wt%, or > 86 wt%, or > 88 wt% or > 90 wt%, based on the weight of the crosslinked composition.M4] The crosslinked composition of any one of A]-J2] or A4]-L4] above, wherein the crosslinked composition has a gel content < 100 wt%, or < 99 wt%, or < 98 wt%, based on the weight of the crosslinked composition.N4] The crosslinked composition of any one of A]-J2] or A4]-M4] above, wherein the crosslinked composition has a (MH-ML) value, at 180°C, > 0.30, or > 0.35, or > 0.40, or > 0.45, or > 0.50 or > 0.55, or > 0.60, or > 0.65, or > 0.70 or > 0.75, or > 0.80 dN*m. See Test method section (MDR) for the determination of MH and ML.04] The crosslinked composition of any one of A]-J2] or A4]-N4] above, wherein the crosslinked composition has a (MH-ML) value, at 180°C, > 0.90, or > 0.95, or > 1.00, or > 1.05, or > 1.10 dN*m.P4] The crosslinked composition of any one of A]-J2] or A4]-O4] above, wherein the crosslinked composition has a (MH-ML) value, at 180°C, < 5.00, or < 4.00, or < 3.00 dN*m. Q4] The crosslinked composition of any one of A]-J2] or A4]-P4] above, wherein the crosslinked composition has a T90, at 180°C, value > 2.0, or > 2.5, or 3.0 min and / or < 6.0, < 5.5, or < 5.0 min. See test method (MDR) section for the determination of T90.A5] The crosslinked composition of any one of A]-J2] or A4]-Q4] above, or the composition of any one of A3]-X3] or A4]-H4] above, wherein the silane of the at least one propylene / silane interpolymer of component a, and the silane of the at least one propylene / silane interpolymer of component z, respectively, are each independently derived from a silane monomer selected from Formula 1 :A-(SiBC-O)x-Si-EFH (Formula 1), where A is an alkenyl group;B is a hydrocarbyl group or hydrogen, C is a hydrocarbyl group or hydrogen, and where B and C may be the same or different;H is hydrogen, and x > 0;E is a hydrocarbyl group or hydrogen, F is a hydrocarbyl group or hydrogen, and where E and F may be the same or different.B5] The crosslinked composition of A5] above, or the composition of A5] above, wherein, for Formula 1 , x is from 0 to 10, or from 0 to 8, or from 0 to 6, or from 0 to 4, or from 0 to 2, or from 0 or 1 , or 0.C5] The crosslinked composition of A5] or B5] above, or the composition of A5] or B5] above, wherein, for Formula 1, A is a C2-C50 alkenyl group, or a C2-C40 alkenyl group, or a C2-C30 alkenyl group, or a C2-C20 alkenyl group.D5] The crosslinked composition of any one of A5]-C5] above, or the composition of any one of A5]-C5] above, wherein, for Formula 1, A is selected from the following structures i) - iv): i) R1R2C=CR3-, where each of R1and R2is independently hydrogen or an alkyl group, and R3is hydrogen, and wherein R1and R2may be the same or different; ii) R]R2C=CR3-(CR4R5)n-, where each of R1, R2, R4, R5is independently hydrogen, or an alkyl group, and R3is hydrogen, and wherein two or more from R1, R2, R4, R5may be the same or different, and n is from 1 to 10, or from 1 to 8, or from 1 to 6, or from 1 to 4, or from 1 to 2, or 1 ;, where each or R1and R2is independently hydrogen or an alkyl, and wherein R1and R2may be the same or different, and n is from 1 to 10, or from 1 to8, or from 1 to 6, or from 1 to 4, or from 1 to 2, or 2; orwhere each or R1and R2is independently hydrogen or an alkyl, and wherein R1and R2may be the same or different, and n is from 1 to 10, or 1 to 8, or 1 to 6, or 1 to 4, or 1 to 2, or 2.E5] The crosslinked composition of any one of A5]-D5] above, or the composition of any one of A5]-D5] above wherein, for Formula 1, A is selected from the following structures is) - ivs): is) R]R2C=CR3-, where each of R1and R2is independently hydrogen or an alkyl group, and R3is hydrogen, and wherein R1and R2may be the same or different; iis) R1R2C=CR3-(CR4R5)n-, where each of R1, R2, R4, R5is independently hydrogen, or an alkyl group, and R3is hydrogen, and wherein two or more from R1, R2, R4, R5may be the same or different, and n is from 1 to 10, or 1 to 8, or 1 to 6, or 1 to 4, or 1 to 2, or 1; iiis)where n is from 1 to 10, or from 1 to 8, or from 1 to 6, from or 1 to 4, or from ivs)from 1 to 10, or from 1 to 8, or from 1 to 6, or from 1 to 4, or from 1 to 2, or 2.F5] The crosslinked composition of E5] above, or the composition of E5] above, wherein, for Formula 1 , A is selected from the structure is) or structure iis).G5] The crosslinked composition of E5] or F5] above, or the composition of E5] or F5] above, wherein, for Formula 1, A is selected from the structure iis).H5] The crosslinked composition of any one of E5]-G5] above, or the composition of any one of E5]-G5] above wherein, for Formula 1, A is selected from the structure iis), and where n is from 1 to 10, or from 2 to 10, or from 2 to 8, or from 2 to 6.15] The crosslinked composition of any one of A5]-H5] above, or the composition of any one of A5J-H5J above, wherein, for Formula 1, B is an alkyl, or a C1-C5 alkyl, or a C1-C4alkyl, or a C1-C3 alkyl, or a C1-C2 alkyl, or methyl.J5] The crosslinked composition of any one of A5J-I5] above, or the composition of any one of A5J-I5] above, wherein, for Formula 1, C is an alkyl, or a C1-C5 alkyl, or a C1-C4 alkyl, or a C1-C3 alkyl, or a C1-C2 alkyl, or methyl.K5] The crosslinked composition of any one of A5J-J5] above, or the composition of any one of A5]-J5 ] above, wherein, for Formula 1, E is an alkyl, or a C1-C5 alkyl, or a C1-C4 alkyl, or a C1-C3 alkyl, or a C1-C2 alkyl, or methyl.L5] The crosslinked composition of any one of A5]-K5] above, or the composition of any one of A2]-K2] above, wherein, for Formula 1, F is an alkyl, or a C1-C5 alkyl, or a C1-C4 alkyl, or a C1-C3 alkyl, or a C1-C2 alkyl, or methyl.M5] The crosslinked composition of any one of A5]-L5] above, or the composition of any one of A5]-L5] above, wherein Formula 1 is selected from compounds si) through sl6), as described below:N5] The crosslinked composition of any one of A5]-M5] above, or the composition of any one of A5 |-M5|, above wherein Formula 1 is selected from structures si) to s8), as described above.05] The crosslinked composition of any one of A5]-N5] above, or the composition of any one of A5]-N5] above, wherein Formula 1 is selected from structures si) to s6), as described above.P5] The crosslinked composition of any one of A5]-N5] above, or the composition of any one of A5]-N5] above, wherein Formula 1 is selected from structure s7) or structure s8) , as described above.Q5] The crosslinked composition of any one of A5]-M5] above, or the composition of anyone of A5]-M5] above, wherein Formula 1 is selected from structures s9) to s 16), as described above.R5] The crosslinked composition of any one of A5]-L5] above, or the composition of any one of A5]-L5] above, wherein the silane is derived from a silane monomer selected from the following compounds: 1 -ethenyldimethylsilane; allyldimethylsilane; 3-butenyl- dimethylsilane; 4-pentenyl-dimethylsilane; 5-hexenyl-dimethylsilane; 6-heptenyl- dimethylsilane; 7-octenyl-dimethylsilane; 8-nonenyl-dimethylsilane; 9-decenyl- dimethylsilane; l-(but-3-en-l-yl)-l,l,3,3-tetramethyl-disiloxane (BuMMH); l-(hex-5-en-l- yl)-l,l,3,3-tetramethyldisiloxane (HexMMH); (2-bicyclo-[2.2.1]hept-5-en-2-yl)ethyl)-silane (NorDMS); or l-(2-bicyclo[2.2. l]hept-5-en-2-yl)ethyl)-l,l,3,3-tetramethyldisiloxane (NorMMH).S5] The crosslinked composition of any one of A5]-L5] above, or the composition of any one of A5]-L5] above, wherein the silane is derived from a silane monomer selected from the following compounds: 1 -ethenyldimethylsilane; allyldimethylsilane; 3-butenyl- dimethylsilane; 4-pentenyl-dimethylsilane; 5-hexenyl-dimethylsilane; 6-heptenyl- dimethylsilane; 7-octenyl-dimethylsilane; 8-nonenyl-dimethyl-silane; or 9-decenyl- dimethylsilane.T5] The crosslinked composition of any one of A5]-L5] above, or the composition of any one of A5]-L5] above, wherein the silane is derived from a silane monomer selected from the following compounds: 5-hexenyl-dimethylsilane; or 7-octenyl-dimethylsilane, and further 5-hexenyl-dimethylsilane.U5] The crosslinked composition of any one of A5]-T5] above, or the composition of any one of A5]-T5] above, wherein the alkenyl group (A) comprises only one carbon-carbon double bond (C=C).V5] The crosslinked composition of any one of A5]-U5] above, or the composition of any one of A5]-U5] above, wherein Formula 1 does not comprise a Si-OR bond, where R is alkyl. W5] The crosslinked composition of any one of A]-J2], A4]-Q4] or A5]-V5] above, wherein the silane of the at least one propylene / silane interpolymer of component a, is derived from a silane monomer that does not comprise a Si-OR bond, where R is alkyl.X5] The composition of any one of A3]-X3], A4]-H4] or A5]-V5] above, wherein the silane of the at least one propylene / silane interpolymer of component z, is derived from a silane monomer that does not comprise a Si-OR bond, where R is alkyl.Y5] The crosslinked composition of any one of A]-J2], A4]-Q4] or A5]-W5] above,wherein the first composition comprises a crosslinking coagent; and further the crosslinking coagent is present in an amount > 0.005 wt%, or > 0.01 wt%, or > 0.02 wt%, or > 0.05 wt%, or > 0.10 wt%, or > 0.20 wt% and / or < 10 wt%, or < 5.0 wt%, or < 2.0 wt%, or < 1.0 wt%, or < 0.50 wt%, based on the weight of the first composition.Z5] The composition of any one of A3]-X3], A4]-H4], A5]-V5] or X5] above, wherein the composition comprises a crosslinking coagent; and further the crosslinking coagent is present in an amount > 0.005 wt%, or > 0.01 wt%, or > 0.02 wt%, or > 0.05 wt%, or > 0. 10 wt%, or > 0.20 wt% and / or < 10 wt%, or < 5.0 wt%, or < 2.0 wt%, or < 1.0 wt%, or < 0.50 wt%, based on the weight of the composition.A6] An article comprising at least one component formed from the crosslinked composition of any one of AJ-J2], A4]-Q4], A5]-W5] or Y5] above.B6] An article comprising at least one component formed from the composition of any one of A3]-X3], A4]-H4], A5]-V5], X5] or Z5] above.C6] The article of A6| or B6] above, wherein the article is an automotive part, a building material, a footwear component, a computer part, or a PV film, and further an automotive part.D6] The article of A6] or B6] above, wherein the article is a weatherstrip profile.E6] A method of forming a crosslinked composition, said method comprising mixing the composition of any one of A3]-X3], A4]-H4], A5]-V5], X5] or Z5] above.F6] The method of E6] above, further comprising thermally treating the composition.G6] The method of E6] or F6] above, wherein the composition is thermally treated at a temperature s 120°C, or S 125°C, or S 130°C, or > 135°C, or S 140°C, or S 145°C, or S 150°C, or > 155°C, or > 160°C, or > 165°C, or > 170°C, or > 175°C, or > 180°C and / or < 250°C, or < 240°C, or < 230°C, or < 220°C, or < 215°C, or < 210°C, or < 205°C, or < 200°C.TEST METHODSCompositional Conventional Gel Permeation ChromatographyThe chromatographic system consisted of a Polymer Char GPC-IR (Valencia, Spain) high temperature GPC chromatograph, equipped with an internal IR5 infrared detector (IR5). The autosampler oven compartment was set at 160° Celsius, and the column compartment was set at 150° Celsius. The columns were one Agilent PLgel MIXED “7.5 x 50 mm,” 20 pm linear mixed-bed guard column and four Agilent PLgel MIXED-A “7.5 x 300 mm,” 20pm linear mixed-bed columns. The chromatographic solvent was 1 ,2,4-trichlorobenzene (TCB), which contained 300 ppm of butylated hydroxytoluene (BHT) and was nitrogen sparged. The injection volume used was 200 microliters, and the flow rate was 1.0 milliliters / minute.Calibration of the GPC column set was performed using Agilent EasiCal Polystyrene standards (EasiCal PS-1 and EasiCal PS-2). Each EasiCal system consisted of two different spatulas supporting a mixture of 5 polymer standards (approximately 5 mg) to obtain 20 molecular weights points ranging from approximately 580 to 6,570,000 g / mole. Individual spatulas were added to septa-capped vials, sealed, and loaded into the Polymer Char autosampler. Polymer Char Instrument Control Software was utilized to add 8 mL of solvent to each vial and the standards were dissolved for 15 minutes at 160° Celsius under high-speed shaking prior to injection to the chromatography system.A third order polynomial was used to fit the nominal polystyrene standard peak molecular weights to obtain molecular weight equivalent, calibration points at each chromatographic slice. The polystyrene standard peak molecular weights were converted to polypropylene molecular weights using Equation 1 :(EQI), where M is the molecular weight, A has a value of 0.647 and B is equal to 1.0.The total plate count of the GPC column set was performed with decane (3% v / v in TCB introduced via micropump). The plate count for the chromatographic system should be greater than 18,000 for the four Agilent “Mixed A” 30 cm, 20-micron linear mixed-bed columns.Samples were prepared in a semi-automatic manner with the Polymer Char Instrument Control Software, wherein the samples were weight-targeted at “2 mg / ml,” and the solvent was added to a septa-capped sealed vial, via the Polymer Char high temperature autosampler. The samples were dissolved for two hours at 160° Celsius under high-speed shaking.The calculations of Mn(GPC), MW(GPC), and MZ(GPC) were based on GPC results using the internal IR5 detector (measurement channel) of the Polymer Char GPC-IR chromatograph according to Equations 2-4. Using Polymer Char GPCOne™ software, the baseline- subtracted IR chromatogram at each equally-spaced data collection point (i) was converted to the polypropylene equivalent molecular weight, obtained from the narrow standard calibration curve, for the equivalent chromatographic data point (i). Equations 2-4 are asfollows:In order to monitor the deviations over time, a flowrate marker (3% v / v decane in solvent) was introduced into each sample, via a micropump controlled with the Polymer Char GPC-IR system. This flowrate marker (FM) was used to linearly correct the pump flowrate (Flowrate(nominal)) for each sample, by RV alignment of the respective decane peak within the sample (RV(FM Sample)), to that of the decane peak within the narrow standards calibration (RV(FM Calibrated)). Any changes in the time of the decane marker peak were then assumed to be related to a linear-shift in flowrate (Flowrate(effective)) for the entire run. After calibrating the system based on a flow marker peak, the effective flowrate (with respect to the narrow standards calibration) is calculated as Equation 5. Processing of the flow marker peak was done via the Polymer Char GPCOne™ Software. Acceptable flowrate correction is such that the effective flowrate should be within + / -0.7% of the nominal flowrate.Flowrate(effective) = Flowrate(nominal) * (RV(FM Calibrated) / RV(FM Sample)) (EQ5).Propylene Composition CalibrationA calibration for the IR5 detector rationing was performed using polyethylene homopolymer, polypropylene homopolymer and six ethylene-propylene copolymer standards of known propylene comonomer content ranging from 6-34wt% (as measured by13C NMR Method).The IR5 Area Ratio (or IR5 Methyl Channel Area / IR5 Measurement Channel Area ) of the baseline- subtracted area response of the IR5 methyl channel sensor” to “the baseline- subtracted area response of IR5 measurement channel sensor” (standard filters and filter wheel as supplied by Polymer Char: Part Number IR5_FWM01 included as part of the GPC- IR instrument) was calculated for each of the “Copolymer” standards. A linear fit of the Wt% Comonomer frequency versus the “IR5 Area Ratio” was constructed in the form of the following Equation 6: Wt% Comonomer = Ao + [ Al X (IR5 Methyl Channel Area / IR5 Measurementchannel Area)] (EQ 6), where Ao is the “Wt% Comonomer” intercept at an “IR5 Area Ratio” of zero, and Ai is the slope of the “Wt% Comonomer” versus “IR5 Area Ratio” and represents the increase in the Wt% Comonomer as a function of “IR5 Area Ratio.” The IR5 area ratio is equal to the IR5 height ratio for narrow PDI and narrow SCBD standard materials.1H NMR Spectroscopy - Wt% SilaneSpectra were acquired on a Varian 500 MHz spectrometer with cryoprobe. In a typical experiment, 15-30 mg of polymer (propylene / silane interpolymer) was dissolved in 550 pL of 1 , 1 ,2,2-tetrachloroethane-d2 (Cambridge Isotope Laboratories) at 110°C, in a nitrogen flushed vial. The solution was transferred with a preheated glass pipet into a preheated “5 mm” NMR tube, flushed with nitrogen, then capped. The spectra were acquired at 110°C, with DI = 60s, and either 16 or 32 scans.1H NMR spectra were used to determine wt% HDMS comonomer, as an example. After thorough phasing and baselining, the residual solvent peak was referenced to 5.99 ppm. The following two integral regions were used to estimate the polymer composition: aliphatic (1.8-0.75 ppm) and SiMcv (0.13 ppm). The integral of SiMez was set to 6, and the resulting integral of the aliphatic region was used to calculate the wt% HDMS. The integral of the aliphatic region was adjusted to account for the aliphatic protons of HDMS that were captured there, and the equation is as follows: wt% HDMS = 100crefers to theintegral of the aliphatic range from 1.8-0.75 ppm (aliphatic protons).Moving Die Rheometer (MDR) MeasurementsCuring characteristics were measured using a MonTech 3000 Basic Moving Die Rheomoeter (MDR), according to ASTM D5289, with a 0.5 deg arc, and frequency of 1.66 Hz. For each composition, the MDR test was loaded with approximately 6 g of the formulated composition. The MDR test was run for 15 minutes at 180°C. The “Torque vs Time” profile was generated over the given interval as a curing profile. The following data were used from each MDR run: MH (dN*m), or the maximum torque exerted by the MDR during the testing interval (this usually corresponds to the torque exerted at the final time point of the test interval); ML (dN*m), or the minimum torque exerted by the MDR during the testing interval (this usually corresponds to the torque exerted at the beginning of the testinterval); and T90 (time it takes to reach 90% of the MH value). One test sample was tested per composition.Gel Content AnalysisGel content measurement was performed according to ASTM D2765-16 by extraction in hot xylene (Xylenes, Reagent ACS, 99%, Thermo Scientific Chemicals). A crosslinked sample of known mass was placed in a 120-mesh stainless steel folded envelope (mesh available from McMaster Carr). The envelope was extracted under refluxing xylenes, containing about 1 wt% butylated hydroxytoluene (BHT), for at least six hours, before removing and drying under vacuum to a constant mass.Gel content (wt%) = 100Differential Scanning CalorimetryDifferential Scanning Calorimetry (DSC), as discussed below, is used to measure Tm, Tc, Tg and crystallinity in propylene-based (PP) samples and ethylene-based (PE) samples. Each sample (0.5 g) is compression molded into a film, at 25000 psi, 190°C, for 10-15 seconds. About 5 to 8 mg of film sample is weighed and placed in a DSC pan. The lid is crimped on the pan to ensure a closed atmosphere. The sample pan is placed in a DSC cell, and then heated, at a rate of approximately 10°C / min, to a temperature of 230°C for PP (180°C for PE). The sample is kept at this temperature for three minutes. Then the sample is cooled at a rate of 10°C / min to -60°C for PP (-90°C for PE), and kept isothermally at that temperature for three minutes. The sample is next heated at a rate of 10°C / min, until complete melting (second heat). Unless otherwise stated, melting point (Tm) and the glass transition temperature (Tg) of each polymer sample are determined from the second heat curve, and the crystallization temperature (Tc) is determined from the first cooling curve. The Tg and the respective peak temperature for the Tm are noted. The percent crystallinity can be calculated by dividing the heat of fusion (Hf), determined from the second heat curve, by a theoretical heat of fusion of 165 J / g for PP (292 J / g for PE), and multiplying this quantity by 100 (for example, % cryst. = ((Hf / 165 J / g) x 100 (for PP)).EXPERIMENTALReagents and commercial polymers are shown in Table 1.Note, EP refers to a propylene / ethylene copolymer.Polymer Syntheses - Solution PolymerizationsEach polymer was synthesized in a 100 mL polymerization reactor that was hydraulically full, and which operated at steady state conditions. The solvent was ISOPAR- E, supplied by the ExxonMobil Chemical Company. Hexenyldimethylsilane (HDMS) was used as a termonomer and was purified over AZ-300 alumina, supplied by UOP Honeywell, prior to use. The HDMS was fed to the reactor as a “250 g / L solution in ISOPAR-E.” The reactor temperature was measured at or near the exit of the reactor. The polymer solution was collected into trays, which were placed in a fume hood, and the solvent was allowed to evaporate overnight. The trays containing the remaining polymer were then transferred to a vacuum oven, and heated to 100°C, under reduced pressure, to remove any residual solvent. After cooling to ambient temperature, the polymer was weighed for yield / efficiencies, transferred to containers for storage, and submitted for analytical testing. The catalyst and polymerization conditions are shown in Tables 2 A and 2B, respectively. Polymer properties are shown in Table 3.Table 2B: Polymerization ConditionsTable 3: Polymer Properties* Amount of C2 (wt%) = { 100 wt% - C3(wt%) -HDMS(wt%)}Pre-Crosslinked Compositions In a glass jar, 13 g of polymer (see Table 3) was imbibed with 65 mg (0.5 phr), 130 mg (1.0 phr), 195 mg (1.5 phr), or 260 mg (2.0 phr) Dicumyl peroxide (DCP), by heating to 60°C and periodically agitating. Note, each phr is based on 100 weight parts of the polymer. The material was then compounded in a “15 cc” XPLORE Microcompounder, at 100-120°C, for five minutes at 50 rpm, and then extruded prior to curing.ResultsEach pre-crosslinked composition was subject to cure using the MDR test (see test method section). Cure results (MDR) and gel content are shown in Table 4. As seen in Table 4, no cure occurred with any of the control compositions (CE1-CE6). It appears the compositions CE1 through CE6 did not crosslink because the peroxide radical caused extensive chain scission of the polymer backbone. In contrast, each of the compositions IE1- IE17 cured and achieved a high level of gel content. Crosslinked compositions IE4 through IE17 also had higher (MH-ML) values, each indicating a greater degree of crosslinks among the polymer chains.Table 4: Cure Results*Based on the weight of the crosslinked composition.5

Claims

CLAIMS1. A crosslinked composition formed from a first composition comprising at least one propylene / silane interpolymer, as component a, and at least one peroxide, as component h and wherein the crosslinked composition comprises a gel content > 10 wt%, based on the weight of the crosslinked composition.

2. The crosslinked composition of claim 1, wherein the at least one propylene / silane interpolymer of component a is a propylene / ethylene / silane interpolymer or a propylene / alpha- olefin / silane interpolymer.

3. The crosslinked composition of claim 1 or claim 2, wherein the at least one interpolymer of component a comprises, in polymerized form, from 60 wt% to 99 wt% of propylene, based on the weight of the interpolymer.

4. The crosslinked composition of any one of claims 1-3, wherein the at least one interpolymer of component a comprises, in polymerized form from 0. 10 wt% to 10 wt% of the silane, based on the weight of the interpolymer.

5. The crosslinked composition of any one of claims 1-4, wherein the at least one interpolymer of component a has melting point < 80°C, as determined by DSC.

6. The crosslinked composition of any one of claims 1-5, wherein the at least one interpolymer of component a has a weight average molecular weight (Mw) > 180,000 g / mol.

7. The crosslinked composition of any one of claims 1-6, wherein the silane of the at least one propylene / silane interpolymer of component a is derived from a silane monomer selected from Formula 1 :A-(SiBC-O)x-Si-EFH (Formula 1), where A is an alkenyl group;B is a hydrocarbyl group or hydrogen, C is a hydrocarbyl group or hydrogen, and where B and C may be the same or different;H is hydrogen, and x > 0;E is a hydrocarbyl group or hydrogen, F is a hydrocarbyl group or hydrogen, and where E and F may be the same or different.

8. The crosslinked composition of any one of claims 1-7, wherein the crosslinked composition has a gel content > 75 wt%, based on the weight of the crosslinked composition.

9. The crosslinked composition of any one of claims 1-8, wherein the crosslinked composition has a (MH-ML) value, at 180°C, > 0.90 dN*m.

10. An article comprising at least one component formed from the crosslinkedof any one of claims 1-9.

11. A composition comprising, as component z, at least one propylene / silane interpolymer; and wherein interpolymer comprises, in polymerized form, one of the following i) through iii): i) ethylene in an amount < 25 wt%, based on the weight of the interpolymer; or ii) an alpha-olefin in an amount < 25 wt%, based on the weight of the interpolymer; or iii) ethylene and an alpha-olefin, where the combined amount of both is in an amount< 25 wt%, based on the weight of the interpolymer; and wherein interpolymer comprises, in polymerized form, > 75 wt% propylene, based on the weight of the interpolymer.

12. The composition of claim 11 , wherein the at least one propylene / silane interpolymer of component z is a propylene / ethylene / silane interpolymer or a propylene / alpha-olefin / silane interpolymer.

13. The composition of claim 11 or claim 12, wherein the at least one interpolymer of component z comprises, in polymerized form, from 0. 10 wt% to 10 wt% of the silane, based on the weight of the interpolymer.

14. The composition of any one of claims 11-13, wherein the at least one interpolymer of component z has melting point < 80°C, as determined by DSC.

15. The composition of any one of claims 11-14, wherein the at least one interpolymer of component z has a weight average molecular weight (Mw) or > 180,000 g / mol.

16. A crosslinked composition formed from the composition of any one of claims 1 1 -15.

17. The crosslinked composition of claim 16, wherein the crosslinked composition has a gel content > 75 wt%, based on the weight of the crosslinked composition.

18. The crosslinked composition of claim 16 or claim 17, wherein the crosslinked composition has a (MH-ML) value, at 180°C, > 0.90 dN*m.

19. An article comprising at least one component formed from the composition of any one of claims 11-15.

20. A method of forming a crosslinked composition, said method comprising mixing the composition of any one of claims 11-15.

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