228 results about "Pendant group" patented technology

Provided in the present invention is a polyester polymer containing a cyclic imide structure. A cyclic imide side group or side chain is introduced into a polyester polymer by means of a diacid monomer or a diol monomer, thereby overcoming the defects of the polyester polymer being hard and brittle, improving the comprehensive mechanical properties of toughness, etc., thereof, and improving the heat resistance of the polyester polymer.

The invention discloses a silane cross-linked polyolefin halogen-free flame-retardant cable material and a low-energy-consumption preparation method thereof.The preparation method comprises the steps that EVA / EEA serves as a matrix, silane groups are covalently connected to a polyolefin molecular chain through a free radical grafting reaction, and a grafting material containing an active silane side group is prepared; meanwhile, vinyl isocyanate is adopted to chemically modify hydroxyl on the surface of magnesium hydroxide, vinyl is grafted to the surfaces of particles, the polarity of the particles is reduced, and the dispersity of the particles is enhanced; then carrying out melt blending on the grafted material and modified magnesium hydroxide, constructing an interface bridge by using an anhydride group, and shortening the two-phase distance; finally, through room-temperature natural cross-linking and warm water auxiliary cross-linking, silane groups are promoted to be hydrolyzed into silanol, the silanol is condensed to form a-Si-O-Si-three-dimensional network, meanwhile, vinyl on the surface of magnesium hydroxide and a polyolefin matrix are subjected to free radical copolymerization, and a covalent bond interface layer is formed between inorganic particles and an organic matrix. According to the method, the synergistic improvement of high crosslinking degree, strong stretchability and excellent flame retardance of the cable material is realized through molecular-level interface regulation and cross-linking network optimization.

According to the aromatic polyester containing the cyclic imide structure, a cyclic imide side group or side chain is introduced into the aromatic polyester through a diacid monomer or a diol monomer, so that the defects that the aromatic polyester is low in mechanical strength and poor in film-forming supporting performance are overcome; by introducing an imide structure, the polarity of the polymer is improved, and the rear-end blending modification capability is improved, so that the comprehensive mechanical property of a polyester product is improved.

The invention relates to the technical field of high polymer material processing, in particular to a high-strength modified polyaryletherketone profile and a preparation method thereof.The preparation method includes the steps that S1, chopped fibers are subjected to surface activating treatment after being heated and dried to remove impurities, then ultrasonic dipping treatment is conducted in an interface treatment solution, and interface treatment fibers are obtained after taking out and drying; an interface treatment agent contained in the interface treatment solution is bisphenol AF type polyaryletherketone PI-PAEK containing an imide side group; s2, the interface treating agent and polyaryletherketone resin are adopted or not adopted to be subjected to melt blending to serve as matrix resin, the matrix resin and the interface treating fibers are subjected to melt blending extrusion, granulation and forming, and the high-strength modified polyaryletherketone profile is obtained; the modified polyaryletherketone profile disclosed by the invention has relatively high mechanical property and glass transition temperature and relatively low thermal expansion coefficient.

A preparation method of the cardanol-based phosphorus-containing side group novolac epoxy resin comprises the following steps: (1) in the presence of a catalyst A, carrying out a stirring reaction on cardanol and an aldehyde compound at 80-110 DEG C for 3-10 h to prepare an intermediate A; (2) stirring the intermediate A and a phosphorus-containing compound at 50-150 DEG C to react for 10-24 hours to prepare an intermediate B; and (3) in the presence of a catalyst B, stirring and reacting the intermediate B and epichlorohydrin at 70-110 DEG C for 2-6 hours, and in the presence of a catalyst C, stirring and reacting at 30-65 DEG C for 1-4 hours to prepare the cardanol-based phosphorus-containing side group novolac epoxy resin. Through a rigid structure on a main chain of the novolac epoxy resin, a phosphorus-containing structure on a side chain of the novolac epoxy resin and an epoxy group, the toughness and flame retardance of an epoxy cured product can be improved on the premise that the thermal stability is not reduced, and the novolac epoxy resin has an extremely good application research prospect.

The invention discloses a catechol side group-containing polylysine derivative as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving catechol acid in an organic phase, firstly adding NHS, stirring and dissolving until the materials are uniformly mixed, then adding EDC.HCl, and stirring and reacting to obtain a catechol-NHS intermediate solution; (2) dissolving polylysine or a salt thereof in a water phase, and adjusting the pH value to 6.0-7.0 by using an alkaline solution to obtain a solution of polylysine or a salt thereof; and (3) adding the intermediate solution obtained in the step (1) into the polylysine or the salt solution thereof obtained in the step (2), and maintaining the pH value of the reaction system at 5.0-6.0 by using an alkaline solution to obtain the catechol side group-containing polylysine derivative. The preparation method is short in reaction time and mild in reaction condition, and the obtained product is high in grafting rate and high in raw material conversion rate and has a good application prospect in the aspects of tissue adhesives and the like.

The invention discloses application of a polymer coupled with a flavin group to catalysis of conversion of NADH (nicotinamide adenine dinucleotide) in a reduction state into NAD + (nicotinamide adenine dinucleotide) in an oxidation state, which is characterized in that in a solution containing various components, the polymer coupled with the flavin group catalyzes the NADH to convert the NAD +, the conversion rate is 0.007-0.85 mu M / s, and the conversion efficiency is 20-100%; the polymer coupled with the flavin group is a product obtained by coupling flavin with a polymer containing a cationic group side group through a covalent bond, the molar ratio of the flavin group in a product molecule to the cationic group in the polymer is 1: 1-1: 100, and the polymer is composed of a repetitive unit containing the cationic group and other repetitive units. Wherein the molar fraction of the amino-containing repeating unit is 5%-100%. Compared with riboflavin, flavin mononucleotide and other biomolecules containing flavin groups, the activity of catalyzing NADH to be oxidized into NAD + can be improved by at least 50 times or above.

The invention discloses an anti-icing coating and a preparation method thereof, and relates to the technical field of coatings, the anti-icing coating comprises a component A and a component B according to a weight ratio of 100: (43-57), the component A is prepared from the following raw materials in parts by weight: 65 to 75 parts of fluorosilicone resin, 3 to 8 parts of modified natural vegetable wax, 0.2 to 0.6 part of a de-foaming agent, 0.5 to 1 part of a flatting agent and 15 to 25 parts of a solvent; the component B comprises the following raw materials in parts by weight: 5-10 parts of a curing agent and 40-50 parts of a solvent. Fluorosilicone resin containing isobornyl on a side group is used as a film-forming base material, and modified natural vegetable wax obtained by sequentially performing oxygen-enriched microwave plasma treatment and grinding treatment on rice bran wax and castor bean wax in a proper proportion is introduced, so that the anti-icing capability of the anti-icing coating at low temperatures such as-40 DEG C and the like is remarkably improved; and the defects in the prior art are overcome.

The invention relates to a copolyamide elastomer with a nitrogen-containing side group and a preparation method and application thereof, the copolyamide elastomer comprises a copolymer with a hard segment and a soft segment, and the soft segment is a polyether soft segment and / or a polyester soft segment; the hard segment comprises repetitive units as shown in a formula (1) and a formula (2), and a nitrogen-containing side group R3 is substituted or unsubstituted amino. The copolyamide elastomer disclosed by the invention is low in melting point and easy to form and process, has the characteristic of photoluminescence, can convert part of ultraviolet light into blue light, and has relatively high transmittance to visible light.

The invention discloses ternary copolymerized low-dielectric polyimide based on fluorinated cross-linked side groups as well as a preparation method and application of the ternary copolymerized low-dielectric polyimide. According to the preparation method, two diamine monomers with a fluorine-containing group and a large-volume side chain group, namely fluorine-containing triarylmethane diamine and tetrafluorostyrene side group-containing diamine, are polymerized with 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride to obtain the ternary copolymerized polyimide (Co-FPAPI-x), and the preparation method is efficient, simple, convenient and low in cost. The tetrafluorostyrene group in the ternary copolymerized polyimide structure can form a hydrophobic cross-linked network through a thermal cross-linking reaction. Besides, by changing the proportion and thermal crosslinking degree of the two diamine monomers, the accumulation state, polarization behavior and the like of a molecular chain can be adjusted, so that the performance of the material is improved.

The invention provides an injectable polyurethane material as well as a preparation method and application thereof, and belongs to the field of injectable materials. The injectable polyurethane material has a cross-linked polyurethane structure and hydrophilicity, and the injectable polyurethane material is formed by polymerizing a polyethylene glycol-diisocyanate prepolymer, a cross-linking agent and a chain extender; the cross-linking agent has a structure as shown in a formula 1, and the chain extender has a structure as shown in a formula 2. The injectable polyurethane material can be formed by specifically adopting a cross-linking agent containing Schiff base and a chain extender taking catechol as a side group, and introducing the cross-linking agent containing Schiff base and the chain extender taking catechol as a side group into a polyurethane network. In the cross-linked hydrophilic polyurethane disclosed by the invention, the pH response capability of Schiff base can be utilized, and controllable injection can be realized through secondary processing; the mechanical property is good, and application is facilitated. # imgabs0 #

Rubber diaphragm, sound device and application thereof are provided; rubber diaphragm includes distortion improving agent with mass percentage of 0.5-50%; distortion improving agent is random linear polymer with more than two monomer components randomly arranged on main chain, and distortion performance is synergistically regulated by monomer components; end group and / or side group and side chain of distortion improving agent includes special chemical reaction crosslinking points with mass percentage of 0.01-20, and number average molecular weight of distortion improving agent is 500-1200000; and distortion improving agent or main chain thereof is prepared by one-step method. Rubber diaphragm includes distortion improving agent, which is random linear polymer that components are randomly arranged on main chain. Sound device of rubber diaphragm is used to reduce distortion of low-frequency band obviously while maintaining good frequency response characteristics; and preparation method of distortion improving agent is simple, low in cost and has wide application.

The present disclosure provides a molecularly imprinted polymer (MIP) selective for a perfluoroalkyl and polyfluoroalkyl substance (PFAS), an article comprising such an MIP, methods of making the same, and methods of using the same. The MIP comprises moieties of a monomer having a first portion for an electrically conductive polymer chain and a second portion comprising a N-oxyl side group for redox activity. The MIP is obtained through polymerization of the monomer in the presence of the specific PFAS as a template. The MIP is configured to be selective to the PFAS for a measurement of a concentration of the PFAS.

The present invention relates to the technical field of polymer materials, and specifically to an oil-water separation component and a preparation method thereof, and an oil-water separator. The oil-water separation component is assembled from a plurality of oil-water separation materials, and the ratio of the distance between two adjacent oil-water separation materials to the thickness of the oil-water separation material is 1-10:1; wherein the oil-water separation material is a porous material, and the porous material is a polypropylene material with a plurality of micro-nano structures on the surface and inside, and the micro-nano structures are grafted with oleophilic side groups; wherein, on the cross section of the porous material, the surface grafting rate of the oleophilic side groups is 20-60wt%. The present invention limits the oil-water separation component to contain a plurality of oil-water separation materials, so that the oil-water separation component composed of the porous material has a high oil-water separation efficiency and stable performance; at the same time, the structure of the oil-water separation component is simple and easy to install, and there is no need to frequently replace parts.

A self-assembling composition includes molecules of a first polymer, molecules of a positively charged second polymer, and a nucleic add. First pendant groups conjugated to pendant amine group of the first polymer include a hydrophilic polymer. Second pendant groups conjugated to the pendant amine groups include a hydrophobic group. Third pendant groups conjugated to the pendant amine groups include a group selected from a nucleoside and a nucleoside analog. Fourth pendant groups conjugated to the second polymer via pendant amine groups thereof include the hydrophilic polymer. Fifth pendant groups are conjugated to the amine groups of the second polymer include the hydrophobic group. The second polymer also includes repeat units wherein the pendant amine groups are positively charged in vivo.

A solid electrolyte composition comprising the following components: (i) an organic polymer comprising a polymeric backbone and pendant groups, wherein at least a portion of the pendant groups contain an anionic group associated with a first metal ion; (ii) a solvent homogeneously incorporated in the polymer to result in a polymer gel system; and (iii) a metal salt dissolved in the solvent in a molar concentration of 0.05 M to 1.5 M and containing a second metal ion associated with an anion, provided that the first and second metal ions are the same. Also described herein are solid-state batteries comprising: a) an anode; (b) a cathode; and (c) the solid electrolyte composition described above.

The application relates to a polyaryletherketone resin, a preparation method thereof and application thereof in functional membranes, and belongs to the technical field of functional polymer materials. First, an aromatic monomer 4,4'-((9-(6-(4-tritylphenoxy)hexyl)-9H-carbazole-3,6-diyl)bis(diphenylmethylene))diphenol (monomer 1) containing a dense benzene ring and a flexible side group is prepared; then, through a nucleophilic substitution reaction catalyzed by K2CO3, a polyaryletherketone precursor polymer containing a Schiff base is prepared by taking 1,1-bis(4-fluorophenyl)-N-phenylmethane imine, 4,4'-dihydroxydiphenyl ketone and the monomer 1 as raw materials; after the polyaryletherketone precursor polymer is sulfonated by concentrated sulfuric acid, a polyaryletherketone resin containing sulfonic acid groups is prepared; after the polyaryletherketone resin is dissolved in dichloroacetic acid, a polyaryletherketone ion exchange functional membrane is prepared by adopting a flow extension method, and the membrane has the advantages of excellent oxidation resistance stability, good dimensional stability and solution processing property and the like.

This invention discloses a method for preparing a zinc-based solid electrolyte membrane based on a polycarbonate-based ionic liquid. In the presence of a catalyst, carbon dioxide and epichlorohydrin are alternately copolymerized at 25-70°C and 2.0-4.0 MPa carbon dioxide to obtain a polycarbonate with chloromethyl side groups, which is then purified by dissolution / precipitation. A side group substitution reaction is carried out by adding 1-methylimidazolium to a polar solvent to obtain an imidazolium halide-type ionized polycarbonate. Subsequently, a zinc-free solution is used... 2+ The zinc-based solid polymer electrolyte membrane was obtained by anion exchange with TFSI-salt followed by desalting and purification. The ionic liquid was then mixed with zinc salt, and a membrane was fabricated using a casting method, followed by drying and peeling to obtain the membrane. The large volume and high degree of charge delocalization of anions in the ionic liquid are beneficial for reducing ion-pair interactions, providing a better ion transport environment for the zinc-based solid electrolyte membrane and addressing the issue of Zn content in existing zinc-based solid electrolytes. 2+ It has strong interactions with anions and polymer polar groups, which can easily lead to increased resistance to ion migration.

The present invention is a preparation and application of a histone acetyltransferase electrochemical sensor based on a "Cu(II) to Cu(II)" mechanism. First, the sulfhydryl group in CoA and Cu(II) generate a CoA-Cu(II) complex in situ, which can be regarded as a nanochain complex with multiple adenines as side groups. The complex can be combined with GO through its adenine side group through a π-π conjugation effect, so as to be combined and fixed on the electrode surface, and the voltage signal of Cu(II) is collected by FSCV technology. Because the polymerization of CoA and Cu(II) can realize the electrochemical sensing analysis of CoA, and because CoA is the product of the HAT catalytic reaction, the electrochemical sensing analysis of HAT can be realized. By changing the concentration of CoA or HAT, a series of FSCV signal sizes corresponding to CoA and HAT at different concentrations can be obtained; when the inhibitor anacardic acid / C646 is added, the HAT activity is inhibited, CoA cannot be generated, and the complex cannot be formed, thereby realizing the screening of HAT inhibitors. Based on this, a fast, simple, reliable, stable and highly sensitive FSCV analysis method is constructed.

The present invention relates to a method for coating short fibers, comprising: - de-sizing sized silicon carbide short fibers, - depositing, on the de-sized short fibers, an adhesion promoter made of metal oxide ceramic material having pendent groups at its surface, the adhesion promoter being deposited by atomic layer deposition, and - depositing, on the de-sized short fibers covered with the adhesion promoter, boron nitride by atomic layer deposition, comprising (a) grafting a first Lewis acid precursor comprising boron to the surface of the adhesion promoter by addition onto the pendent groups at the boron atom, and (b) reacting the first grafted precursor with a second precursor comprising nitrogen in order to obtain the boron nitride.

The invention relates to the technical field of proton exchange membranes, and discloses a novel nano-composite membrane with acid doped with pyridine side chains, the composite membrane comprises a difunctional pyridine side group-containing polyaryletherketone polymer, an acid-doped pyridine side chain-containing polyaryletherketone polymer, and an acid-doped pyridine side chain-containing polyaryletherketone polymer, a hexagonal boron nitride nanosheet (h-BN); the polymer is obtained by copolymerizing a monomer (2, 6-bis (4-hydroxyphenyl) pyridine) containing a pyridine side group, a monomer (4, 4 '-(1, 2-vinyl) diphenol) containing a vinyl side chain and the like, and the composite membrane is prepared by preparing the polymer and h-BN into a base membrane, then doping with a phosphoric acid solution, and finally performing heat treatment at 140-180 DEG C to initiate vinyl crosslinking. According to the invention, a dual dopant retention mechanism is constructed by utilizing the acid-base adsorption effect of a pyridine group on phosphoric acid and the physical locking effect of a thermal cross-linked network on phosphoric acid, the nanosheet provides physical barrier, and the composite membrane has high proton conductivity, low vanadium ion permeability and excellent long-term stability.

This invention provides an injectable polyurethane material, its preparation method, and its applications, belonging to the field of injectable materials. The injectable polyurethane material has a cross-linked polyurethane structure and hydrophilicity. It is formed by polymerizing a polyethylene glycol-diisocyanate prepolymer, a cross-linking agent, and a chain extender. The cross-linking agent has a structure of Formula 1, and the chain extender has a structure of Formula 2. Specifically, this invention can employ a cross-linking agent containing a Schiff base and a chain extender with catechol as a side group, introducing both into a polyurethane network to form the injectable polyurethane material. In this invention, this cross-linked hydrophilic polyurethane can utilize the pH-responsiveness of the Schiff base to achieve controlled injection through secondary processing; moreover, it has good mechanical properties, facilitating its application.

A super-wet surface is a polypropylene surface, on which a hydrophilic side group is grafted, having a micro-nano structure. The super-wet surface is at least super-hydrophilic and does not contain an initiator residue. The super-wet surface is prepared by grafting, in the absence of an initiator, by means of microwave irradiation, a monomer for forming a side group, on the polypropylene surface, as a grafting base, having a micro-nano structure. In the preparation of the super-wet surface, the molecular weight of polypropylene does not decrease after grafting, there is no residual monomer or initiator residue, and the super-wetting effect of the obtained surface is lasting and stable. The super-wet surface can be used in bonding, spraying, oil-water separation, water treatment, biology, medicine and energy fields.

Provided are adhesive articles that include a silicone adhesive and a substrate, with a primer layer interposed between the silicone adhesive and the substrate. The primer layer includes a polymer having a polyorganosiloxane pendant group P represented by the formula (I) where each R1 is independently an alkyl, haloalkyl, arylalkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; R2 is an alkyl or an alkenyl group; R3 is an alkylene or an arylalkylene group; and n is an integer in the range of 1 to 20. The primer layer typically improves the adhesion between the silicone adhesive and a wide variety of substrates.

A polyimide, comprising 1-100 mol % of repeating units of formula (1), based on 100 mol % of total repeating units of the polyimide, wherein each V is as defined herein; and each R1 is independently a divalent group of formula (3), wherein A is anionic, and each A is independently —O, —S, —S(O)2, —S(O)2O, —OS(O)2O, —OP(O) (OR)dO, —P(O)(Re)O, —P(O)(ORf)O, or —OP(O)(Rg)O; and X is cationic, and each X is independently Li, Na, K, Cs, Mg, Ca, Sr, Cr, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, B, Al, Ga, In, Ge, Sn, Pb, As, Sb, phosphonium, imidazolium, guanidinium, or pyridinium; and Rd, Re, Rf, and Rg are each independently hydrogen, substituted or unsubstituted C1-8 alkyl, or substituted or unsubstituted C6-12 aryl.

The invention discloses a phosphorus-containing large-volume side group low-dielectric polyimide film and a preparation method thereof, and belongs to the technical field of polyimide films. The preparation method of the polyimide film comprises the following steps: dissolving a diamine compound and other diamine monomers in an organic solvent; adding a dianhydride monomer, and reacting to obtain a polyamide acid solution; defoaming the polyamide acid solution, and salivating to a mirror surface steel belt through a die head to form a self-supporting film; the self-supporting film is subjected to longitudinal drawing and transverse drawing imidization treatment at the same time, and the polyimide film is obtained. The preparation process of the diamine compound comprises the following steps: mixing, heating and stirring 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 4-aminoacetophenone, 2-(1-methylpropyl) aniline and p-toluenesulfonic acid in a nitrogen atmosphere; and cooling the reactant, placing in methanol, heating in water bath, crystallizing, and drying to obtain the diamine compound. The polyimide film has low dielectric constant and dielectric loss, has excellent mechanical and thermodynamic properties, and can be applied to the field of 5G communication.

The invention pertains to a method of making fluoropolymer dispersions using certain polyfunctional perfluoropolyether derivatives including a plurality of ionisable groups selected from the group consisting of —SO.sub.3X.sub.a, —PO.sub.3X.sub.a and —COOX.sub.a, whereas X.sub.a is H, an ammonium group or a monovalent metal, and whereas said groups are comprised as pendant groups in the perfluoropolyether chain, and to fluoropolymer dispersions therefrom.

The invention discloses a fluorine-free transparent polymer material with high oxygen permeability. The fluorine-free transparent polymeric material comprises at least one silicone cage compound having at least one polymerizable hanging group and up to seven side chains, at least one acrylic compound, at least one acrylate-functionalized compound, and a styryl tris (trimethylsiloxy) silane. Any compound of the transparent polymeric material does not contain elemental fluorine. The first polyhedral oligomeric silsesquioxane (POSS) monomeric silicone cage has one polymerizable methacrylate suspending group and seven isoalkyl side chains, and the second polyhedral oligomeric silsesquioxane (POSS) monomeric silicone cage has two polymerizable methacrylate suspending groups and six isoalkyl side chains. The transparent polymeric material has a Dk of about 150 and a Shore D hardness greater than 70.

The invention discloses polyaryletherketone resin, a preparation method and application of the polyaryletherketone resin in a functional film, and belongs to the technical field of functional polymer materials. The preparation method comprises the following steps: firstly, preparing an aromatic monomer 4, 4 '-((9-(6-(4-triphenylmethyl phenoxy) hexyl)-9H-carbazole-3, 6-diyl) bis (diphenylmethylene)) diphenol (monomer 1) of a dense benzene ring containing a flexible side group, then taking 1, 1-bis (4-fluorophenyl)-N-phenylmethane imine, 4, 4'-dihydroxydiphenylketone and the monomer 1 as raw materials, and carrying out a nucleophilic substitution reaction catalyzed by K2CO3, so as to obtain the high-molecular polymer. A polyaryletherketone precursor polymer containing Schiff base is prepared; a polyaryletherketone precursor polymer is sulfonated with concentrated sulfuric acid, polyaryletherketone resin containing sulfonic acid groups is prepared, the polyaryletherketone resin is dissolved in dichloroacetic acid, a film is laid through a casting method, the polyaryletherketone ion exchange functional membrane is prepared, and the membrane has the advantages of being excellent in anti-oxidation stability, good in size stability, good in solution processability and the like.

The invention provides a gas diffusion layer and a preparation method and application thereof. The gas diffusion layer comprises a substrate and a microporous layer arranged on one surface of the substrate, the preparation raw materials of the microporous layer comprise a combination of a conductive material, a binder and a first solvent; the binder includes a polymer having a hydrophobic backbone and hydrophilic pendant groups. The gas diffusion layer provided by the invention is simple in structure, adopts a polymer with a hydrophobic main chain and a hydrophilic side group as a binder and a hydrophilic-hydrophobic regulator of the microporous layer at the same time, simplifies the formula of the microporous layer, enables the microporous layer to have better bonding strength, enables the prepared microporous layer to be more compact and higher in peel strength, and is suitable for large-scale production. Meanwhile, the whole microporous layer contains hydrophilic components, so that a better water retention effect is achieved, and the water retention performance under low humidity is good.