302 results about "Pendant group" patented technology

The invention relates to the technical field of polymer synthesis, in particular to polyaryletherketone resin containing imide side groups and a preparation method of the polyaryletherketone resin. By introducing an imide structure into aryl diphenol containing amino, a plurality of polyaryletherketone resins containing imide side groups are designed and synthesized, and are used for meeting various application requirements, such as high-performance materials, electronic materials, optical materials and the like; meanwhile, the performance of the polyaryletherketone material is also improved, so that the polyaryletherketone material is more suitable for various application environments.

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.

The invention relates to the technical field of composite materials, in particular to fiber sizing liquid, a polyether-ether-ketone composite material and a preparation method of the polyether-ether-ketone composite material, and the fiber sizing liquid comprises low-molecular-weight polyaryletherketone containing imide side groups, carbon nanotubes and the like; the composite material is obtained by carrying out heat treatment on fibers, re-sizing the fibers by adopting the sizing liquid, and then carrying out melt extrusion on the fibers and polyether-ether-ketone. The sizing liquid provided by the invention can effectively improve the compatibility between fibers and PEEK, so that the mechanical properties of the composite material are obviously improved.

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 discloses an anti-static polyether-ether-ketone composite film as well as a preparation method and application thereof, relates to the technical field of electrostatic protection materials, and solves the problem of poor dispersity of single-form conductive fibers in a polyether-ether-ketone material in the prior art. The In2O3SnO2 (at) CF composite material with the multilayer porous structure and the superfine hollow structure is prepared through a spinning method and a solvothermal method, the specific surface area of the material is increased, and the conductivity is remarkably improved. The anti-static polyether-ether-ketone composite film is prepared by utilizing a method that indium and tin metal ions in the In2O3SnO2 (at) CF composite material can form stable coordinate bonds with amino groups and carboxyl groups in polyether-ether-ketone containing amino groups and carboxyl side groups, so that the interface bonding capacity between the In2O3SnO2 (at) CF composite material and the anti-static polyether-ether-ketone composite film is remarkably enhanced; the stability and the durability of the anti-static polyether-ether-ketone composite film are further improved. The anti-static film can be applied to preparation of anti-static films of integrated circuit chips and sensors in mobile phones or small electronic equipment.

The invention discloses hydrophilic modified polysulfone resin with side carboxyl groups and a preparation method of the hydrophilic modified polysulfone resin, and relates to the technical field of polysulfone. According to the invention, desalted water is used as a salt-forming solvent to carry out a salt-forming reaction of the bisphenol monomer, after the salt-forming reaction is finished, the salt-forming agent of the system is reacted and alkalinity is weakened, and then an NMP solvent is added to carry out water sampling, so that interference of NMP decomposition on carboxyl in a salt-forming stage is reduced, and the proportion of diphenolic acid connected with a molecular chain is consistent with a feeding ratio; the formed hydrophilic modified polysulfone resin is more stable in component; meanwhile, before end capping, side chain carboxyl forms a stable coordination complex, so that the end capping can be performed on the diphenolic acid type hydrophilic polysulfone, the content of phenol end groups with poor thermal stability is greatly reduced, and the natural color can be kept during extrusion granulation.

The invention discloses a photocatalytic polyether-ether-ketone ion exchange membrane as well as a preparation method and application thereof. The invention belongs to the field of polymer chemistry. The problem that the photocatalyst is difficult to recover in the prior art is solved. The preparation method comprises the following steps: preparing a polyether-ether-ketone film with amino and carboxyl side groups by using a film casting method and a chemical grafting method, preparing CoTiO3 nanofibers by using an electrostatic spinning method, preparing Bi-coated CoTiO3 by using a photodeposition method, and grafting Bi-coated CoTiO3 onto the polyether-ether-ketone film containing amino and carboxyl side groups by using a coordination field effect between metal ions and amino and carboxyl to obtain the CoTiO3 / Bi-coated CoTiO3 composite material. And the photocatalytic polyether-ether-ketone film is prepared. The prepared photocatalytic polyether-ether-ketone film has corrosion resistance and stability, can be applied to an extreme environment, can separate a photocatalyst from a reaction medium, realizes reuse, has the advantages of high degradation rate and high reducibility on various antibiotics and heavy metal ions, and can be applied to sewage treatment in various environments.

A fluorine-free transparent polymeric material with high oxygen permeability includes at least one silicone cage compound having at least one polymerizable pendant group and up to seven side chains, at least one acrylic compound, at least one acrylate functionalized compound, and styryltris(trimethylsiloxy)silane. None of the compounds of the transparent polymeric material contain the element fluorine. A first polyhedral oligomeric silsesquioxane (POSS) monomer silicone cage has one polymerizable methacrylate pendant group and seven isoalkyl side chains while a second polyhedral oligomeric silsesquioxane (POSS) monomer silicone cage has two polymerizable methacrylate pendant groups and six isoalkyl side chains. The Dk of the transparent polymeric material is approximately 150 and the Shore D hardness is greater than 70.

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.

A composition, comprising: a hydrogel comprising crosslinked polymer chains, at least some of the crosslinked polymer chains having an agent coupled thereto. A method, comprising curing a precursor composition so as to give rise to a composition according to the present disclosure. A precursor composition, comprising: polymer chains bearing pendant groups; a crosslinker adapted to couple pendant groups to one another; and a functionalizer adapted to couple to a pendant group. A method, comprising curing a precursor composition according to the present disclosure so as to give rise to a composition, the composition optionally being a composition according to the present disclosure. A method, comprising: forming a hydrogel; and coupling the hydrogel to an agent, the coupling being effected by coupling (1) a pendant group borne by a polymer chain of the hydrogel and (2) a coupler associated with the agent.

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.

Bioderived pressure-sensitive adhesives. The present invention solves ongoing needs for further biofriendly adhesives. The role of mobile cross-links on the properties of a bio-friendly adhesive made using composites of cyclodextrin-based macromolecules and poly(lipoic acid) is demonstrated. Cyclodextrin-based hosts and polyrotaxanes with pendant groups of lipoic acid (a commonly ingested antioxidant) are modified to incorporate them as cross-links in poly(lipoic acid) networks obtained by simple heating in open air. By systematically varying the adhesive formulations while probing their mechanical and adhesive properties, trends in structure-property relationships that enable one to tune network properties and access bio-friendly, high-tack pressure-sensitive adhesives are shown. This invention provides bio-derived adhesive materials that are biofriendly and exhibit adhesion underwater. Multiple applications are possible including a pressure sensitive adhesive, a load bearing adhesive, an underwater adhesive, and adhesives for biomedical applications.

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.

Poly(oxazoline) conjugates with pendant cationic groups (cationic POZ) and lipid nanoparticles (LNPs) including cationic POZ used to facilitate delivery of an encapsulated payload. LNPs and polyplexes including cationic POZ and a nucleic acid payload such as, but not limited to, mRNA or modified mRNA are disclosed. Such LNPs have no immunogenicity or reduced immunogenicity as compared to a corresponding LNP containing an ionizable lipid.

Poly(oxazoline) conjugates with pendant cationic groups (cationic POZ) and lipid nanoparticles (LNPs) including cationic POZ used to facilitate delivery of an encapsulated payload. LNPs and polyplexes including cationic POZ and a nucleic acid payload such as, but not limited to, mRNA or modified mRNA are disclosed. Such LNPs have no immunogenicity or reduced immunogenicity as compared to a corresponding LNP containing an ionizable lipid.

A fluorine-free transparent polymeric material with high oxygen permeability includes at least one silicone cage compound having at least one polymerizable pendant group and up to seven side chains, at least one acrylic compound, at least one acrylate functionalized compound, and styryltris(trimethylsiloxy)silane. None of the compounds of the transparent polymeric material contain the element fluorine. A first polyhedral oligomeric silsesquioxane (POSS) monomer silicone cage has one polymerizable methacrylate pendant group and seven isoalkyl side chains while a second polyhedral oligomeric silsesquioxane (POSS) monomer silicone cage has two polymerizable methacrylate pendant groups and six isoalkyl side chains. The Dk of the transparent polymeric material is approximately 150 and the Shore D hardness is greater than 70.

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.

The present disclosure provides methods and processes for the recovery of compounds (e.g., pendant groups) from polymeric materials, as well as methods for recycling and reusing such compounds by synthetically converting a recovered compound to building blocks that can be used in, e.g., curable resins for the fabrication of new devices, such as medical devices (e.g., orthodontic appliances).

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.