1597 results about "Polymer composition" patented technology

The invention provides a polymer additive and application thereof. The polymer additive is prepared from the following components in parts by mass: 30 to 90 parts of diethyl phosphinate, 0.01 to 3 parts of ethyl phosphonate, 5 to 67 parts of dialkyl phosphinate and 0.01 to 5.5 parts of alkyl phosphinate. The dialkyl phosphinate has a structure as shown in a formula I, and the alkyl phosphinate has a structure as shown in a formula II. According to the invention, through design and compounding synergy of various phosphonates, the flame-retardant effect can be obviously improved, so that the polymer additive has excellent and efficient flame retardance. The polymer additive is used in a polymer material, and a polymer composition containing the polymer additive can have excellent flame retardant property, good toughness, high impact strength and excellent mechanical property and humidity and heat resistance under the condition that the addition amount is small.

The present disclosure relates to a preparation method of a super absorbent polymer composition. More specifically, it relates to a preparation method of a super absorbent polymer composition capable of pulverizing the hydrogel polymer to a normal particle size without agglomeration between particles by adding an additive having a specific structure, and significantly reducing the amount of fine powder generated during the process.

The invention provides a patterned photonic crystal laser and a preparation method thereof, the laser comprises a substrate, and a first mask layer, a photonic crystal layer and a second mask layer which are sequentially deposited on the substrate, a light emitting area is etched in the central area of the second mask layer, and transparent conductive layers are deposited on the surface of the second mask layer and the light emitting area; a p-annular electrode is arranged on the surface of the transparent conductive layer on the second mask layer, and an n-annular electrode is arranged below the substrate; the photonic crystal layer is composed of a nanorod array and a polymer filled in gaps of nanorods; holes distributed in a patterned array are etched in the surface of the first mask layer, and nanorods are epitaxially grown in hole areas; the nanorod is formed by sequentially depositing a substrate contact layer, a first waveguide layer, a multi-quantum well layer, a second waveguide layer, a coating layer and a component gradient layer. According to the invention, through collaborative design optimization of all the layers, emission of laser with specific wavelength and preparation of a laser emitting laser with single longitudinal mode, narrow linewidth and stable wavelength are realized.

In one aspect, the disclosure relates to a flame retardant composition comprising a brominated polystyrene reacted with a first portion of a second polymer, and optionally at least a second portion of the second polymer that is not premixed with the brominated polystyrene alone. In some aspects, the first portion and the second portion of the second polymer can be selected from the group consisting of polyamides, polyolefins, polyesters, styrenic polymers or copolymers, or any combination thereof. In any of these aspects, the flame retardant compositions of the present disclosure are sufficiently mixed and have excellent properties, and can optionally include crosslinking to increase mechanical strength. Also disclosed herein are methods for preparing the compositions and articles of manufacture comprising the compositions.

Recycling wind turbine blades includes shredding, crushing, and milling the wind turbine blades to yield a multiplicity of particles including glass fiber and sieving the particles to yield a multiplicity of pellets including glass fibers. Manufacturing a composite coaxial fiber includes providing a first, second, and third polymer composition to yield a composite coaxial fiber precursor, processing the composite coaxial fiber precursor to yield a coagulated composite coaxial fiber precursor, drawing the coagulated composite coaxial fiber precursor, and heating the drawn coagulated composite coaxial fiber precursor to yield the composite coaxial fiber. The second polymer composition can include the recycled glass fibers. The resulting composite coaxial fiber includes an inner and outer layer including polyacrylonitrile and a middle layer between the inner layer and the outer layer. The middle layer includes polyacrylonitrile and a multiplicity of the recycled glass fibers.

The invention relates to the technical field of polymer compositions, and particularly discloses a degradable bio-based food packaging material and a preparation method thereof.The degradable bio-based food packaging material is prepared from polylactic acid, ITA esterified bacterial cellulose, CSL-ITA esterified bacterial cellulose, polycaprolactone glycol, acetyl tributyl citrate, a photoinitiator and tocopherol; the preparation method comprises the following steps: esterifying bacterial cellulose hydrogel with itaconic anhydride, grafting with sodium copper chlorophyllin, dehydrating with gradient ethanol, and drying with supercritical CO2 to obtain modified powder; according to the preparation method, the interfacial compatibility of the bacterial cellulose and the polylactic acid is enhanced through ITA esterification, the illumination antibacterial function is given by utilizing CSL grafting, the polycaprolactone glycol and the acetyl tributyl citrate are synergistically used for toughening and improving the brittleness, the photoinitiator is added, the photoinitiator is added for mixing, and ultraviolet crosslinking curing is performed after film forming. The tocopherol protects the stability of the antibacterial structure of the CSL, the water resistance is improved through photo-crosslinking, and the material is degradable and meets the food packaging requirement.

Multi-layered articles or products comprising layers of filled polymer compositions, methods of making and applications or uses thereof.

A pressure-relief valve includes a main body equipped to be fastened to a flexible package material. The main body has at least one through hole forming a passage through the main body. A valve membrane lies, on a package side, against the main body in a region around the hole, and a sealing liquid between the main body and the valve membrane. The valve has a water-soluble polymer, whereby at least one component of the valve, for example the main body, is made of a polymer composition that includes a water-soluble polymer.

The invention discloses a multifunctional coating with a compact-porous double-layer structure on the surface of magnesium alloy and a preparation method, and belongs to the technical field of biological materials. According to the multifunctional coating, magnesium alloy serves as a substrate, a compact layer and a porous layer are sequentially stacked from the substrate to the outside, and the compact layer is composed of two-dimensional transition metal carbide / nitride, calcium silicate nanowires and a positively charged polymer. The porous layer is composed of copper-containing complex / biopolymer composite fibers, mineralized silk fibers loaded with bioactive metal ions and astragalus polysaccharide on the surface, and natural polymers. According to the multifunctional coating with the compact-porous double-layer structure prepared on the surface of the magnesium alloy, the porous layer on the surface layer has a unique porous structure, growth and proliferation of osteoblasts can be well promoted, meanwhile, the multifunctional coating has the characteristics of pressure resistance, bacteria resistance and oxidation resistance, the compact layer on the bottom layer can improve the corrosion resistance of the magnesium alloy, and the service life of the magnesium alloy is prolonged. The coating is particularly suitable for surface coating of magnesium alloy implant materials and can be used in the field of medical instruments.

The disclosure relates to block copolymer nanoparticles for therapeutic delivery of nucleic acids, and methods therefor. More particularly, the invention relates to polymer nanoparticles, such as reversible addition-fragmentation chain transfer (RAFT) polymer compositions, for delivering miRNAs.

A cross-linked product obtained through crosslinking a polymer composition that contains a rubber component, an inorganic filler and a cross-linking agent and that satisfies conditions (a) to (c): (a) the rubber component contains a conjugated diene-based polymer (A) having, when composition ratios (molar ratios) in the conjugated diene-based polymer (A) of structural units represented by formulae (1) to (4) are p, q, r, and s, respectively, a value α represented by formula (i) of 0.80 or more and 0.97 or less;(b) a blending ratio of the conjugated diene-based polymer (A) is 10% by mass or more relative to a total amount of the rubber component; and (c) a blending ratio of the inorganic filler is 40 to 150 parts by mass relative to 100 parts by mass of the rubber component, wherein the Tg of the cross-linked product is −25° C. or lower.

The present invention relates to a crosslinkable polyethylene composition comprising an additive composition consisting of a mixture of polyethylene glycol and a mixture of 4, 4 '-thiobis (2-tert-butyl-5-methylphenol) plus thio-diethylene bis [3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate], and a method for producing the crosslinkable polyethylene composition.

The present application relates to a lithium metal negative electrode material, a negative electrode sheet, a lithium metal secondary battery, an electric device, a preparation method and an application. The lithium metal negative electrode material comprises lithium metal and a polymer Poly bonded to the lithium metal in the lithium metal, the polymer Poly has a linear carbon chain and a first side chain and a second side chain grafted to the side groups of the linear carbon chain, the first side chain contains a fluorinated aliphatic chain Rf, and the second side chain contains an EO block. The lithium metal negative electrode material comprises a polymer layer firmly combined with the lithium metal in a dense and uniform manner, the polymer layer has certain elasticity, flexibility and swelling, can play a protective layer role at the negative electrode of the lithium metal secondary battery for a long time, the polymer composition in the polymer layer contains a fluorinated aliphatic chain and a flexible side chain, the polymer layer can effectively inhibit the contact reaction between the electrolyte and lithium, reduce the consumption of the electrolyte and lithium metal, prolong the cycle life of the battery, and also can inhibit the lithium dendrite problem.

The invention relates to polymer nanoparticle and DNA nanostructure delivery compositions for non-viral delivery, and methods therefor. More particularly, the invention relates to polymer nanoparticle delivery compositions, such as reversible addition-fragmentation chain transfer (RAFT) polymer compositions, and DNA nanostructure delivery compositions, such as DNA origami compositions, for the delivery of more than one payload, or for the delivery of a nucleic acid construct payload of 3 kB or more, and methods therefor.

The invention refers in a first aspect to self-supporting film comprising green luminescent crystals (1), red luminescent crystals (2), and a polymer (3). The green luminescent crystals (1) are perovskite crystals. The red luminescent crystals (2) are zincblende or wurzite, preferably zincblende, crystals. A second aspect of the invention refers to a solid polymer composition (100). A third aspect of the invention refers to a light emitting device comprising either the solid polymer composition (100) or the self-supporting film.

In general, a foamed antioxidant masterbatch is disclosed. The foamed antioxidant masterbatch comprises an olefin polymer and one or more organic phosphite antioxidants. The foamed antioxidant masterbatch comprises a cell structure comprising one or more cells. The one or more organic phosphite antioxidants is provided in the one or more cells. The present disclosure is also directed to a method of making a foamed antioxidant masterbatch using a foaming agent and a method of making a polymer composition from the foamed antioxidant masterbatch and a second polymer.

The invention provides an olefin polymer composition and application thereof, and relates to the technical field of composite materials. The olefin polymer composition is prepared from the following raw material components in parts by weight: 100 parts of an olefin polymer, 0.5 to 5 parts of an anthraquinone compound and 1 to 5 parts of aspartic ester resin, the structure of the aspartic ester resin contains C8-C24 alkylene and a polyethylene glycol chain segment. The olefin polymer composition has good hydrophilicity, and the treatment effect of the olefin polymer composition on nitrogen-containing sewage can be improved.

The invention belongs to the technical field of medical wound materials, and relates to conductive nanofiber aerogel for preventing and treating stress injury and a preparation method thereof. The conductive nanofiber aerogel comprises nanofiber aerogel, a polypyrrole conductive network and a polydopamine hydrophilic layer, wherein the polypyrrole conductive network and the polydopamine hydrophilic layer are deposited in the nanofiber aerogel; the nanofiber aerogel is composed of nanofibers containing a first methylacryloylated polymer and polylactic acid and a second methylacryloylated polymer, the nanofibers are in staggered lap joint to form a three-dimensional skeleton, and the lap joint is wrapped by the second methylacryloylated polymer. The preparation method comprises the following steps: preparing nanofiber aerogel, and sequentially infiltrating the nanofiber aerogel into a pyrrole / FeCl3. 6H2O solution and a dopamine hydrochloride / Tris-HCl solution to react. The conductive nanofiber aerogel has good structural stability, biological safety, hydrophilic imbibition and pressure / seepage sensing capability, and can play an efficient role in prevention and treatment of pressure injury.

A shipping container including a multilayer composite including a core layer including an assembly and a first cover layer provided on the core layer, wherein the first cover layer includes a first composition having a density of at least 0.903 g / cm3 and including polypropylene and optionally reinforcement fibers such as glass fibers wherein the assembly includes a plurality of elongated foamed elements that are arranged next to one another in one plane and bonded to one another at abutting side faces thereof, wherein the elongated foamed elements have been made by cutting at least one foamed sheet having a top surface and a bottom surface, the at least one foamed sheet having been prepared by a foamed extrusion process and the foamed sheet includes a polymer composition including polypropylene, wherein the cutting is perpendicular to the top surface and the bottom surface of the at least one foamed sheet.

The disclosure relates to block copolymer nanoparticles for therapeutic delivery of nucleotides, and methods therefor. More particularly, the invention relates to polymer nanoparticles, such as reversible addition-fragmentation chain transfer (RAFT) polymer compositions, for delivering miRNAs.

Provided are a tetrafluoroethylene-based polymer composition for a binder for an electrochemical device, said composition enabling a mixture sheet having excellent uniformity to be obtained, and a binder for an electrochemical device that uses said composition, an electrode mixture, an electrode, and a secondary battery. The tetrafluoroethylene-based polymer composition is used in the binder for an electrochemical device, and has an average particle size of 1 μm to 300 μm, and an average aspect ratio of 2.0 or less.

The invention discloses a high-strength energetic compound based on a polydopamine and thiourea polymer and a preparation method of the high-strength energetic compound, and the energetic compound is composed of energetic crystal 1, 3, 5-triamino-2, 4, 6-trinitrobenzene, the polydopamine and the thiourea polymer. The preparation method comprises the following steps: modifying an energetic crystal 1, 3, 5-triamino-2, 4, 6-trinitrobenzene through polydopamine in advance; the polythiourea is obtained through reaction of 2, 2 '-(ethylene dioxygen) diethylamine, carbon disulfide and trimethylolpropane tripolypropylene glycol ether, and the addition amount is 2.5 wt.%-10 wt.%; and mixing the two components by a kneading method, and drying to obtain the energetic compound. The obtained compound has the characteristics of strengthening and toughening, the Brazil mechanical strength reaches 14.76 MPa, and the fracture strain reaches 0.474%. By introducing polyphenol polydopamine and polythiourea to achieve a synergistic effect, the mechanical property of the explosive is greatly improved, and a technical support can be provided for the application of the explosive; meanwhile, the preparation method is simple, mild in reaction condition and easy for large-scale production.

A polymer processing aid (PPA) reduces melt defects in extruded polyolefins in the absence of fluoropolymers. A polymer processing aid comprising a block copolymer having polyamide blocks and polyether blocks reduces melt defects well in a thermoplastic polyolefin such as a linear low density polyethylene (LLDPE). Inclusion of an adjuvant PPA comprised of polycaprolactone, or polycaprolactone diol polymer further improves the melt fracture behavior in a thermoplastic and in the absence of fluoropolymers.

Provided are polymer compositions made by a process comprising: (a) providing a first reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the first reactive composition to a first activation step such that the first reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator; (c) contacting the crosslinked substrate network with a grafting composition containing one or more ethylenically unsaturated compounds, wherein the contacting is conducted under conditions such that the grafting composition penetrates into the crosslinked substrate network; and (d) activating the covalently bound activatable free radical initiator at one or more selective regions of the crosslinked substrate network such that the grafting composition polymerizes with the crosslinked substrate network at the selective regions.

The present invention relates to a polymer composition comprising the following components: A) 5 to 35 wt.-% based on the overall weight of the polymer composition of a recycled polyolefin fabric substrate; wherein said fabric substrate is coated with a polyolefin composition comprising the following components: a1) an ethylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.857 to 0.915 g / cm3 and a MFR2 (190° C., 2.16 kg) determined according to ISO 1133 in the range of 0.5 to 30 g / 10 min; and a2) a propylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.850 to 0.910 g / cm3 and a MFR2 (230° C., 2.16 kg) determined according to ISO 1133 in the range of 0.01 to 30 g / 10 min; B) 65 to 95 wt.-% based on the overall weight of the polymer composition of a homopolypropylene or a recycled polymer blend comprising b1) polypropylene and b2) polyethylene, wherein the weight ratio of b1) to b2) is from 3:7 to 12:1; with the proviso that components A) and B) add up to 100 wt.-%. Furthermore, the present invention relates to use of component A) for increasing the Charpy Notched Impact Strength of component B) and to an article comprising the polymer composition according to the present invention.

To provide a polymer composition that allows production of a hose exhibiting high oil resistance, and excellent abrasion resistance and heat resistance.SOLUTION: A polymer composition comprises: (A) a conjugated diene-based polymer, and (B) at least one polymer selected from the group consisting of nitrile rubber, hydrogenated nitrile rubber, and ethylene-vinyl acetate copolymer, wherein the rubber component (A) is a conjugated diene-based polymer having a value α, expressed by the following formula (i), in the range of 0.60 to 0.98, where the composition ratios (molar ratios) of the structural units represented by the following formulas (1), (2), (3), and (4) in the polymer are defined as p, q, r, and s respectively. Formula (i): α=(p+(0.5×r)) / (p+q+(0.5×r)+s).SELECTED DRAWING: None

The invention relates to the technical field of polymer compositions, and discloses a fiber microcrack self-healing composition with a shape memory characteristic, which comprises modified polyester containing thermally reversible dynamic covalent bonds and an asymmetric polyether-polyester block copolymer interface regulator, the melt index ratio of the interface regulating agent to the modified polyester is 1.8-3.2, and the interface regulating agent is distributed on the periphery of the modified polyester to form a core-shell microdomain. By utilizing the rheological gradient among the components, the interface regulating agent forms a low-viscosity flowing layer when the matrix shrinks; and the modified polyester is restrained to directionally migrate towards the tip of the fiber microcrack, so that active closing and densification filling of the crack area are realized, micro holes in the repaired area are eliminated, and the mechanical continuity of the composition in a dynamic environment is kept.

To provide a liquid crystal polymer composition that exhibits excellent compoundability and enhanced thermal conductivity while maintaining mechanical strength, toughness, fluidity, and heat resistance of a liquid crystal polymer.SOLUTION: A liquid crystal polymer composition of the present invention comprises a liquid crystal polymer, a plate-like filler having an aspect ratio of 3 or more, a glass fiber having an average fiber diameter of 5 to 15 μm, and a polybenzazole fiber having an average fiber diameter of 5 to 15 μm.SELECTED DRAWING: None

The present invention relates to a polymer composition comprising: a) an ethylene-based copolymer; b) > = 0.1 wt% and < = 5.0 wt%, preferably > = 0.1 wt% and < = 1.0 wt%, of a crosslinking agent; c) > = 0.05 wt% and < = 5.0 wt%, preferably > = 0.05 wt% and < = 0.5 wt%, of a coupling agent, preferably a silane coupling agent; d) more than or equal to 0.05 wt% and less than or equal to 5.0 wt%, preferably more than or equal to 0.05 wt% and less than or equal to 1.0 wt% of an auxiliary agent, preferably an auxiliary agent containing a phosphate moiety, an isocyanurate moiety or a cyanurate moiety; wherein all wt% are based on the total weight of the polymer composition; and wherein the ethylene-based copolymer has a vinyl unsaturation content of > = 6.0 / 105 carbon atoms, preferably > = 7.0 / 105 carbon atoms, preferably > = 12.0 / 105 carbon atoms, more preferably > = 12.0 and < = 20.0 / 105 carbon atoms, even more preferably > = 12.0 and < = 15.0 / 105 carbon atoms, when determined according to ASTMD6248-98 (2012). Such a polymer composition allows a desirably long initial stage in curing, thereby allowing flexibility in thermoplastic molding, desirably short curing period, thereby reducing the cycle in the production of packaged solar cell modules while also achieving high degree of crosslinking of the packaging material.

The invention discloses high-temperature-resistant silicone rubber and a preparation method thereof, and belongs to the field of polymer compositions. The silicone rubber is composed of vinyl-terminated polydimethylsiloxane, fumed silica, hydroxyl silicone oil, a hydrogen-containing silicone oil cross-linking agent, a platinum catalyst, an inhibitor methyl butynol, cerium oxide and zinc oxide whiskers. During preparation, vinyl siloxane and 1 / 2 of white carbon black are subjected to vacuum banburying for 40 min at the temperature of 155 DEG C, the remaining white carbon black and hydroxyl silicone oil are added to be mixed for 50 min at the temperature of 125 DEG C, other components are sequentially added after cooling, and vulcanization is conducted at the temperature of 170 DEG C * 15 MPa. The shore A hardness of the obtained silicone rubber is greater than or equal to 63, the retention rate of elongation at break is greater than or equal to 485%, the retention rate of tensile strength after aging at 350 DEG C for 72 hours is greater than or equal to 86%, the thermal weight loss is 5%, the temperature is greater than or equal to 476 DEG C, the Mooney viscosity is less than or equal to 47, and the silicone rubber has excellent processability and high-temperature stability.