121 results about "Pendant group" patented technology

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 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.

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.

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 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.

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 present application relates to the technical field of polyester material modification, and particularly relates to a high-transparency polyethylene naphthalate material, a preparation method and application, aiming at the problems of fast crystallization rate of the PEN material in the process of processing and molding, easy crystallization of thick products, light transmittance reduction caused by the crystallization, and insufficient material toughness, the present application introduces a diol monomer containing a side group and a flexible chain segment diol monomer into the PEN melt polycondensation process for copolymerization, wherein the diol containing a side group introduces a steric hindrance structure in the molecular chain to destroy the regular packing of the PEN molecular chain, thereby inhibiting the material crystallization behavior and improving the light transmittance of the thick product; the flexible diol introduces a flexible chain segment in the molecular chain to increase the free volume of the molecular chain and improve the molecular chain movement ability, thereby improving the material toughness. Through the above-mentioned synergistic copolymerization modification method, the crystallization tendency of the PEN material can be effectively reduced, the obtained PEN thick product has excellent light transmittance and toughness at the same time, and is suitable for the preparation of high-performance transparent polyester products.

The invention discloses a method for accurately synthesizing epoxy polysiloxane with controllable epoxy content by efficiently catalyzing ring-opening polymerization of cyclosiloxane monomers by adopting an organic phosphazene base catalyst. A siloxane copolymer with controllable epoxy siloxane group content can be accurately synthesized at 10-50 DEG C. The invention also discloses a preparation method of the epoxy polysiloxane with controllable epoxy content. The polymer preparation method has the obvious advantages that the polymerization process is simple, the polymerization efficiency is high, the reaction temperature is mild, polysiloxane containing methyl, ethyl, phenyl and vinyl side groups can be prepared, and the polymer preparation method has very high practical application value.

An electrode useful in energy storage devices comprises a current collector and an active layer on the current collector, wherein the active layer comprises electrode active particles, electrically conducting material and a binder wherein the binder comprises a copolymer that comprises a first repeat unit and a second repeat unit; where the first repeat unit is derived from the polymerization of a first monomer which is ethylenically unsaturated monomer having a hydrophilic pendant group and the second repeat unit is derived from the polymerization of a second monomer having ethylenic unsaturation.

The invention provides a supramolecular polymer composition capable of co-assembly to maintain a three dimensional (3-D) macrostructural form after 3-D printing, made of a solvent, a template molecule; and a reactive component. The reactive component can be at least one monomer that is capable of hydrogen bonding with the template molecule to form a 1D supramolecular structure. The template may be an amphiphilic polymer. The monomer has at least two pendant groups capable of covalent crosslinking. The invention also includes a 3-D structure formed by crosslinking a 3-D printed supramolecular polymer composition, which optionally has a mesoporous structure. Also included is a method of manufacturing a 3-D structure by delivering a supramolecular polymer composition onto a surface of a substrate to form the 3-D structure.

This invention provides a polymeric damping fluid, its preparation method, and its application, belonging to the field of damping and vibration reduction technology. The polymeric damping fluid disclosed in this invention comprises the following raw materials: liquid butyl rubber, liquid nitrile rubber, and polysiloxane. The liquid butyl rubber, liquid nitrile rubber, and polysiloxane in the polymeric damping fluid of this invention have numerous and large side groups on their molecular chains. When subjected to external force, the sliding between the molecular chains is hindered by these side groups, generating intramolecular frictional damping. This converts the applied force into intramolecular frictional heat, thereby utilizing the inherent polymeric damping material properties of the damping fluid to absorb the transmitted vibrations and achieve self-damping vibration reduction. Therefore, the polymeric damping fluid of this invention has a dual vibration reduction effect, namely, external frictional vibration reduction and self-damping vibration reduction, resulting in excellent damping and vibration reduction performance.

The present invention relates to a process for preparing a modified polymer comprising functional pendant imidazole groups, said process comprising a step of grafting, onto a starting polymer comprising at least one unsaturation, a compound comprising an epoxide group and a reaction step between the grafted polymer obtained at the end of the previous step and a compound comprising an imidazole group.

This invention discloses an iron complex with a triazacyclic nonane macrocyclic skeleton, its preparation method, and its applications, belonging to the field of coordination chemistry. The iron complex has a triazacyclic nonane macrocyclic skeleton with two acetate side groups and one pyridine-N derivative side group. The iron complex exhibits excellent catalytic activity in the aerobic oxidation of N-aryltetrahydroisoquinoline, while also possessing good stability. The solvents for the catalytic reaction are water and acetonitrile, resulting in low pollution. This invention features mild reaction conditions, simple synthesis operations, and straightforward post-processing, meeting the requirements of environmental friendliness and clean production.

Method for coating short fibers. The present invention relates to a method for coating short fibers, comprising: - the desizing of sieved silicon carbide short fibers, - the deposition, on the desizing short fibers, of an adhesion promoter made of a metal oxide ceramic material having pendant groups on its surface, the adhesion promoter being deposited by atomic layer deposition technique, and - the deposition, on the desizing short fibers coated with the adhesion promoter, of boron nitride by atomic layer deposition technique, comprising (a) the grafting of a first Lewis acid precursor comprising boron to the surface of the adhesion promoter by addition to the pendant groups at the boron atom, and (b) the reaction of the first precursor thus grafted with a second precursor comprising nitrogen to obtain boron nitride. Fig. 2.

The presently disclosed subject matter generally relates to polymer networks having covalent crosslinks, non-covalent crosslinks, and ionic side groups, and methods of making and using same. Specifically, the disclosed polymer networks can be incorporated into membranes, which can be useful in, for example, electrodialysis. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The present application relates to the technical field of chemical product processing, in particular to a low-gloss polyacrylate resin composition, a preparation method and application thereof, which comprises a modified polyacrylate resin solution, an epoxy-siloxane modifier, a vinyl trimethoxysilane oligomer, an organic metal catalyst, a viscosity regulator and a polymerization inhibitor; the ester bond in the modified polyacrylate resin is fixedly protected by the epoxy-siloxane modifier, and the ability of the epoxy-siloxane modifier is further enhanced by the vinyl trimethoxysilane oligomer, so that the problem that the gloss of the extinction type polyacrylate resin containing a bulky side group is irreversibly increased due to ester bond hydrolysis in a hot and humid environment is solved.

In one aspect, the disclosure relates to charge-shifting polymers including a polymeric backbone, one or more tertiary amine-containing pendant groups, and at least one linker between the polymeric backbone and each of the one or more pendant groups, wherein the at least one linker comprises a thioester. Also disclosed are methods of making the same, compositions comprising the charge-shifting polymers and at least one therapeutic molecule, and methods of controlled intracellular release of therapeutic molecules including, but not limited to, small molecules, peptides and proteins, and nucleic acids using the same. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The invention discloses an iron complex with a triazacyclononane macrocyclic skeleton as well as a preparation method and application of the iron complex, and belongs to the technical field of coordination chemistry. The iron complex has a triazacyclononane macrocyclic skeleton, and is attached with two acetate side groups and one pyridine-N derivative side group; the iron complex shows excellent catalytic activity in the aerobic oxidation reaction of N-aryl tetrahydroisoquinoline and has good stability, solvents for the catalytic reaction are water and acetonitrile, and pollution is small. The method is mild in reaction condition, simple in synthesis operation and simple in post-treatment, and meets the requirements of environment friendliness and clean production.

A polyorganosiloxane resin – poly(meth)acrylate copolymer and methods for its preparation and use are provided. The copolymer has resinous polyorganosiloxane pendant groups and an organic polymer backbone. The copolymer may be prepared via condensation reaction. The copolymer is useful as an additive for coatings.

A method includes forming a protective layer over a substrate edge and a photoresist over a substrate. Protective layer removed and photoresist exposed to radiation. Protective layer made of composition including acid generator and polymer having pendant acid-labile groups. Pendant acid-labile groups include polar functional groups; acid-labile groups including polar switch functional groups; acid-labile groups, wherein greater than 5% of pendant acid-labile groups have structurewherein R1 is C6-C30 alkyl group, cycloalkyl group, hydroxylalkyl group, alkoxy group, alkoxyl alkyl group, acetyl group, acetylalkyl group, carboxyl group, alkyl carboxyl group, cycloalkyl carboxyl group, saturated or unsaturated hydrocarbon ring, or heterocyclic group; and R2 is C4-C9 alkyl group, cycloalkyl group, hydroxylalkyl group, alkoxy group, alkoxyl alkyl group, acetyl group, acetylalkyl group, carboxyl group, alkyl carboxyl group, or cycloalkyl carboxyl group; polymer having pendant acid-labile groups and lactone pendant groups; or polymer having pendant acid-labile groups and carboxylic acid groups.

The application provides a rosin-based bio-based benzoxazine, a high-thermal-conductivity liquid crystal benzoxazine resin and a preparation method and application thereof. First, a binary phenol, an amine and paraformaldehyde are used as raw materials to obtain a double benzoxazine through a Mannich reaction; the double benzoxazine is subjected to an amidation reaction with an amino-containing rosin derivative to obtain a bio-based benzoxazine monomer. The bio-based benzoxazine monomer is subjected to thermal curing to obtain a benzoxazine resin containing a rosin side group. The benzoxazine resin containing the rosin side group has a liquid crystal structure, high heat resistance and high thermal conductivity, and has a good application prospect in the fields of integrated circuits, (LED) lighting and the like. The synthesis process of the application is simple, the reaction condition is mild, the yield is high, the equipment requirement is low, and the application is suitable for large-scale production.

This invention discloses a chlorinated polycarbonate-based polyurethane for lithium-ion battery binders and its preparation method. The polyurethane is prepared from carbon dioxide-based polycarbonate diols with chlorine-containing side groups through chain extension with diisocyanate and small-molecule diols. This polyurethane possesses excellent mechanical properties, outstanding heat resistance, and low-temperature flexibility. As a binder for lithium-ion batteries, it contains numerous polar carbonate groups and chlorine groups, facilitating lithium-ion migration and exhibiting high ionic conductivity. The chlorine atoms in the side groups also impart good flame retardancy to the binder, enhancing battery safety. Because the soft segments are carbon dioxide-based copolymers, compared to commonly used PVDF binders, this polyurethane binder also offers advantages such as biodegradability, low cost, and easier recycling of electrode materials.

This invention belongs to the interdisciplinary field of polymer materials and supramolecular chemistry, specifically relating to a polyurethane slip-ring crosslinked network elastic material with a slip-ring effect. The invention uses a macrocyclic molecule with oxetane-functionalized side groups as the cyclic component of a rotaxane. Through host-guest inclusion interactions, it forms a rotaxane polymer with the linear backbone, followed by a ring-opening crosslinking reaction of the oxetane groups, constructing an interpenetrating network structure that combines a three-dimensional covalent network with a supramolecular slip-ring effect. Under mechanical stimulation, this material dissipates energy through the relative slippage of the ring molecules along the backbone, exhibiting high resilience and wide-temperature-range stability. It can be applied in fields such as flexible electronics, wearable devices, and high-performance damping materials.

The application discloses a kind of transparent copolyamide resin and its preparation method, comprising: by containing triazole side group aromatic diacid and alicyclic diamine is prepared by salt reaction polyamide salt, again with caprolactam random copolymerization and preparation obtained target resin.The transparent copolyamide resin involved in the application has the characteristics of simple synthetic route, process environmental protection, product diversification, excellent heat resistance, high toughness and high light transmittance etc..

The application discloses a kind of polyphosphazene proton exchange membrane and its preparation method and application, belong to the field of proton exchange membrane.The application is synthesized by the way of chemical modification and has rigid structure side group sulfonated polydiphenyloxy phosphazene, and it is blended with sulfonated graphene oxide, and polyphosphazene proton exchange membrane is obtained.Sulfonated graphene oxide is used as nano reinforcing body, and strong hydrogen bond and ion interaction are formed between polymer matrix, and stable physical / ionic crosslinking network structure is constructed in microcosmic level.The structure effectively enhances the dimensional stability of membrane, inhibits excessive swelling, and significantly improves the mechanical strength of material.The proton exchange membrane has excellent proton conductivity and low methanol permeability.Compared with existing materials such as single polymer-based film, the proton conduction performance and oxidation stability of the product are significantly improved.