63 results about "Synthetic monomer" patented technology

The present invention relates to a slump-retaining water-reducing agent and a preparation method therefor. The slump-retaining water-reducing agent is prepared from the following raw materials in parts by weight: 8-12 parts of a synthetic monomer, 180-300 parts of an unsaturated polyether monomer, 8-12 parts of an unsaturated carboxylic acid monomer, 15-30 parts of a functional monomer, 1.6-3.0 parts of an oxidizing agent, 0.2-0.8 parts of a reducing agent, 0.6-1.5 parts of a chain transfer agent, and 2-5 parts of a pH regulator, wherein the preparation raw materials of the synthetic monomer comprise an amino acid and a hydroxyalkyl acrylate. By introducing the synthetic monomer in the present invention, on one hand, hydrophilic groups hydrolyzed from an ester group can supplement a carboxyl consumed in a cement paste, and on the other hand, polyhydroxy and long-chain structures contained in the synthetic monomer also further improve the adsorption and dispersion capacity. The water-reducing and slump-retaining water-reducing agent of the present invention can alleviate the problems of a high mixing amount, serious losses, etc. of concrete admixtures, has both water-reducing and slump-retaining properties, and does not influence the strength of concrete. In addition, the water-reducing agent has relatively good adaptability to auxiliaries, such as common water-reducing agents, water-retaining agents, and defoaming agents.

The invention discloses anion exchange resin. Raw materials comprise a synthetic monomer, an initiator and a cross-linking agent, wherein the synthetic monomer comprises methacryloyloxyethyl trimethyl ammonium chloride and acrylamide according to the weight ratio of 7: 3; the initiator comprises potassium persulfate and acrylamide in a weight ratio of 1: 20; the cross-linking agent comprises N, N-methylene bisacrylamide and acrylamide according to the weight ratio of 1: 20. Methacryloyloxyethyl trimethyl ammonium chloride is introduced into a polyacrylamide resin polymerization system, so that the water-absorbent resin has a quaternary ammonium salt-N (CH3) < 3 + > functional group, and dichromate ions in an aqueous solution can be removed.

The invention discloses a low-disordered expanded pi conjugated organic material, a preparation method thereof and a potassium ion battery. The preparation method comprises the following steps: by taking commercial tetraaminobenzoquinone as a synthetic monomer, adding a hydrochloric acid solution for ultrasonic dispersion, then adding sodium acetate to obtain a turbid solution II, then placing the turbid solution II in flowing oxygen, heating and stirring, then washing and drying, putting the obtained powder into dimethyl sulfoxide to obtain a turbid solution III, then ventilating and drying at high temperature, then washing with ethanol, and filtering to obtain a target product. And drying in vacuum to obtain the low-disordered expanded pi conjugated organic material. The organic material can expose more active sites and has a more open skeleton structure, potassium ion diffusion paths are reduced, the capacity and rate capability of TAPT can be greatly improved, the problem that the capacity, cycling stability and ionic conductivity are difficult to improve at the same time when the organic electrode material is applied to a potassium ion battery is solved, and the application prospect is wide. The preparation method is high in cost benefit, simple, convenient and environment-friendly in preparation process, wide in application range and excellent in electrochemical performance.

The present invention discloses a high-capacity and fast charge storage aromatic organic material, a preparation method thereof, and a deep-sea energy storage battery. The method uses tetraaminobenzoquinone as a synthetic monomer, adds sodium chloride and stirs evenly to obtain a black mixture; the black mixture is transferred to a nylon ball mill, concentrated hydrochloric acid is added to the tank, and then ball milling is performed to obtain a mixture; the mixture is put into a dilute sulfuric acid solution and boiled, and the precipitate is washed with deionized water and ethanol after filtering, and dried at high temperature under a vacuum environment to obtain a powder; after high-temperature calcination, it is naturally cooled to room temperature to obtain a high-capacity and fast charge storage aromatic organic material. The material of the present invention is applied to potassium ion batteries, which can significantly improve their electrochemical performance. The present invention has the advantages of high cost-effectiveness, simple and environmentally friendly preparation process, wide applicability, and excellent electrochemical properties.

The invention relates to the field of photosensitive polyimide materials, in particular to a negative photosensitive polyimide photoresist, a polyimide film and application of the negative photosensitive polyimide photoresist and the polyimide film. Compared with the prior art, the water-soluble polyamide acid ester is used as a main raw material, the water-soluble polyamide acid ester is synthesized by using a series of simple and easily available polymeric monomers, the selection of the synthesized monomers is relatively flexible and is not limited to monomers of water-soluble groups such as hydroxyl and carboxyl in molecules, the preparation process is simple, the cost is relatively low, and the current environmental protection requirements are met. The synthesized polyamic acid ester is excellent in water solubility, the polyamic acid ester is combined with a photoinitiator, a cross-linking agent and an organic solvent, and a flame retardant, an inorganic filler, a flatting agent and the like can be selectively added or not added according to needs, so that a negative photoresist with excellent performance is prepared, and the negative photoresist has the advantages of good alkali solubility, high transparency and the like after being prepared into a negative photoetching developing film. The invention has the advantages of high light sensitivity, high resolution, good thermal stability and chemical resistance, good heat and humidity resistance, good adhesion to various base materials and the like, and an inorganic alkali solution can be used as a developing solution.

The invention discloses a copper oxide modified bismuth vanadate photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic reduction of carbon dioxide. The method comprises the following steps: synthesizing a BiVO4 monomer through a hydrothermal method, then mixing and stirring the BiVO4 monomer and a Cu-MOF precursor solution, carrying out electrostatic adsorption compounding, then carrying out calcination treatment to convert Cu-MOF into CuO, loading the CuO on the surface of BiVO4, forming a p-n heterojunction, and preparing the CuO / BiVO4 composite photocatalyst. According to the catalyst, separation of photon-generated carriers is effectively promoted by constructing a heterojunction, the CO2 adsorption and activation capacity is enhanced, and the CO2 photocatalytic reduction performance is remarkably improved; experiments show that the CO yield of the prepared catalyst reaches 36.77 [mu] mol.g <-1 >. H <-1 > in a reaction for 5 hours, which is about 5.7 times that of pure BiVO4, and the catalyst has good stability; the method is simple in process, low in cost and suitable for efficient photocatalytic reduction of CO2 to prepare fuel.

The invention belongs to the technical field of high polymer material recovery, and particularly relates to a method for degrading nylon 6 or a similar polymer thereof into a lactam monomer. The method comprises the following steps: placing waste nylon 6 or a similar polymer thereof, an activation accelerator and an alcohol solvent in a closed reaction container according to a certain proportion, reacting for a period of time at a certain temperature, and evaporating to remove the solvent to obtain a first-step degraded crude product; recrystallizing the degradation crude product obtained in the first step to obtain a pure alcoholysis product; or directly carrying out a second-step cyclization reaction, namely putting the first-step degradation product, alkali, an additive and a solvent into a closed container, reacting at a certain temperature, directly filtering to remove filter residues, and evaporating the solvent in the obtained solution to dryness to obtain the high-purity lactam monomer. According to the invention, nylon 6 or similar polymers thereof can be degraded into corresponding lactam synthetic monomers with high efficiency and high selectivity, the operation is simple, the condition is mild, the post-treatment is simple and convenient, and the method is suitable for large-scale industrial application.

The invention relates to the technical field of polyester synthesis, and discloses flame-retardant anti-dripping polyester and a preparation method thereof. Synthetic monomers of the flame-retardant anti-dripping polyester comprise terephthalic acid, ethylene glycol, a flame retardant a and a flame retardant b, the flame retardant a is 2-carboxyethyl phenyl hypophosphorous acid, and the flame retardant b is [(6-oxo-6H-dibenzo [C, E] [1, 2] oxophosphahexane-6-yl) methyl] succinic acid and / or 2-(diphenyl phosphoryl methyl) succinic acid. According to the invention, the specific flame retardant a and flame retardant b are matched for use and can play roles in an initial combustion stage and a sustained combustion stage respectively, so that the polyester can have better flame retardance and molten drop resistance.

The invention provides halogen-free flame-retardant liquid epoxy resin, solid epoxy resin for powder coating and a preparation method of the solid epoxy resin, and belongs to the technical field of powder coating. The liquid epoxy resin disclosed by the invention is prepared by polymerizing 2, 4-diamino-6-phenyl-1, 3, 5-triazine, formaldehyde, triethyl phosphite, epoxy chloropropane, sodium hydroxide, DMF (Dimethyl Formamide) and the like. The contents of halogen-free flame-retardant elements nitrogen and phosphorus in the product are high, a solid epoxy resin product obtained by carrying out chain extension on liquid epoxy resin serving as a synthetic monomer of solid epoxy resin of the powder coating and bisphenol F is good in flame retardance, the oxygen index reaches 37% or above, and the flame retardance is high. A coating film obtained after the powder coating and an accelerated dicyandiamide curing agent are subjected to low-temperature rapid curing (150 DEG C / 10 min) is high in gloss and leveling grade and good in impact resistance, hardness and the like, and the application requirements of the powder coating are met.

The application relates to the technical field of computer-aided design of high polymer materials, and discloses a polyimide molecular structure generation method and device based on monomer combination, which comprises the following steps: constructing a synthesizable monomer database; constructing a molecular performance prediction model; generating a target polyimide structure based on Monte Carlo tree search; and outputting a candidate scheme. The device corresponds to the method. According to the application, the chemical search space is controlled within a reasonable and operable range by limiting the basic construction monomer; the actual synthesizability of the generated structure is guaranteed from the source by combining the commercially available or known synthesizable monomers; and the intelligent algorithm is used to systematically explore the monomer combination space, so that the discovery efficiency of novel high-performance polyimide materials is significantly improved.

The invention relates to a method for continuously producing poly (p-dioxanone), which comprises the following steps: premixing glycollic acid or a glycollic acid derivative with a ring formation catalyst, and introducing the obtained mixed material and ethylene oxide into a synthesis reaction kettle for reaction; separating and purifying the obtained reaction product, introducing the obtained purified monomer into a polymerization reaction kettle, and adding a polymerization catalyst for polymerization; after polymerization is finished, discharging is conducted, residual materials in the polymerization reaction kettle are subjected to depolymerization treatment to clean the kettle body, after depolymerization is finished, depolymerization products generated in the depolymerization treatment process are discharged, the kettle does not need to be opened for cleaning, and the next round of polymerization production is directly conducted. According to the method disclosed by the invention, the steps of synthesizing the p-dioxanone monomer, separating and purifying the monomer, catalyzing and polymerizing, depolymerizing and cleaning the kettle body and the like are continuously carried out, so that the continuous production of the poly (p-dioxanone) is realized, the side reaction of oligomerization and degradation of the p-dioxanone in storage and transportation can be avoided, and the production cost of the poly (p-dioxanone) is obviously reduced.

The present invention relates to the composition, preparation and application of a retarder for ultra-high temperature cementing and cementing slurry. The synthetic monomers of the high temperature retarder include: 2-acrylamido-2-methylpropanesulfonic acid (AMPS), acrylic acid (AA), N,N-dimethylacrylamide (DMAA), and vinylphosphonic acid (VPA). The high temperature retarder contains a constituent unit A shown in Formula 1, a constituent unit B shown in Formula 2, a constituent unit C shown in Formula 3, and a constituent unit D shown in Formula 4. The ultra-high temperature retarder of the present invention has stable chemical properties and a temperature resistance of up to 250°C. While having high temperature resistance, it does not affect the sedimentation stability of cement slurry at high temperatures, can significantly prolong the thickening time of cement slurry at high temperatures, and the cement stone has higher early strength at low temperatures. It effectively solves the problem of reduced retarding effect caused by severe sedimentation of cement slurry at high temperatures, and can ensure the quality and safety of cementing construction.

The invention discloses a preparation method of a uniform and compact alcohol-permselective composite membrane, and belongs to the technical field of membrane separation. The method comprises the following steps: adding a catalyst A containing a copper ion compound, a graphdiyne synthetic monomer and an organic polymer into ethanol, reacting under certain conditions to prepare a graphdiyne / organic polymer membrane solution A, and loading the membrane solution A on a base membrane through a certain method. Mixing a polymer cross-linking agent and a catalyst B according to a certain proportion to prepare a film forming solution B; heating the membrane liquid B to fill the container with the crosslinking agent steam, placing the membrane loaded with the graphdiyne / organic matter in the container, reacting the organic matter and the crosslinking agent on the surface of the membrane, and placing the membrane in an environment of 80 DEG C for full thermal crosslinking reaction after the reaction is finished. The obtained separation layer is higher in compact degree and smaller in thickness, no solvent exists in the gas-solid / gas-liquid interface reaction process, and the membrane is more uniform and compact. The membrane has high pervaporation and alcohol permeation performance, and can efficiently and stably recover ethanol.

The present invention relates to a monomer composition for synthesizing a recycled plastic, a method for preparing same, and a recycled plastic and a molded article using same, wherein the monomer composition comprises an aromatic diol compound, has a proportion of aromatic diol compound derivative impurities of 0.3% or less, as determined by equation 1, and a melting point of 156.4℃, and is recovered from a polycarbonate-based resin.

The invention relates to the technical field of computer-aided design of high polymer materials, and discloses a monomer combination-based polyimide molecular structure generation method and device, and the method comprises the following steps: constructing a synthesizable monomer database; constructing a molecular performance prediction model; generating a target polyimide structure based on Monte Carlo tree search; and outputting the candidate scheme. The device corresponds to the method. According to the application, the chemical search space is controlled within a reasonable and operable range by limiting the basic construction monomers; combination is carried out based on commercially available or known synthesizable monomers, and the practical synthesizability of the generated structure is guaranteed from the source; the monomer combination space is systematically explored by using an intelligent algorithm, and the discovery efficiency of the novel high-performance polyimide material is remarkably improved.

The invention discloses a battery diaphragm and a secondary battery, and belongs to the technical field of batteries. The battery diaphragm provided by the invention comprises a base membrane and a thermosensitive coating laminated on the surface of at least one side of the base membrane, wherein the thermosensitive coating comprises the following components in percentage by mass: 20-50% of thermosensitive polymer and 45-80% of inorganic particles; a synthetic monomer of the thermosensitive polymer is selected from at least one of the following monomer compounds: at least one of a non-fluorine alkenyl monomer, an alkylene monomer, an unsaturated nitrile monomer, an olefine acid monomer and an ester monomer; the average particle diameter of the inorganic particles is 0.1 [mu] m to 10 [mu] m, and the Mohs hardness of the inorganic particles is 2.0 to 5.0. The thermal sensitive polymer and the inorganic particles in the thermal sensitive coating have a synergistic effect, so that the battery diaphragm not only has a thermal hole closing function, but also has high heat resistance, the thermal shrinkage rate of the battery diaphragm at a high temperature is reduced, and meanwhile, the puncture strength of the battery diaphragm is also improved.

The application discloses a preparation method of a two-dimensional supramolecular polymer based on cation-pi interaction co-assembly, and relates to the technical field of supramolecular polymer materials. + As a cationic unit, a monomer molecule 4,4',4''-(3,7,11-trimethyltriphenylene-2,6,10-triyl)tris(N-dodecylbenzamide) is synthesized as a pi unit, and then the cationic unit and the pi unit are co-assembled to form a two-dimensional supramolecular polymer based on cation-pi interaction co-assembly. The prepared two-dimensional supramolecular polymer has fluorescence color change characteristics and photocatalytic hydrogen evolution performance, further widens the force category of two-dimensional supramolecular materials, and provides a new strategy for the preparation of two-dimensional supramolecular materials and the application of the two-dimensional supramolecular materials in the fields of fluorescence sensing, fluorescence anti-counterfeiting and photocatalytic hydrogen evolution.

The invention relates to the technical field of multifunctional polyester materials, and discloses polyester resin for a high-bio-based content boiling-resistant high-leveling powder coating, which is prepared by the following steps: preparing a carboxylated bio-based organic silicon monomer which is a carboxylated bio-based organic silicon monomer M1 or a carboxylated bio-based organic silicon monomer M2; on the basis of an esterification reaction mechanism, hydroxylated nano SiO2 is subjected to surface modification treatment through a carboxylated bio-based organic silicon monomer, and the bio-based organic-inorganic hybrid water-resistant modifier is prepared. Polyatomic acid and polyhydric alcohol containing 2, 5-furandicarboxylic acid components are used as synthetic monomers, a bio-based organic-inorganic hybrid water-resistant modifier is added, and the semi-crystalline polyester resin with high bio-based content is prepared through catalytic esterification and vacuum polycondensation reaction, and the semi-crystalline polyester resin can significantly improve the water resistance and the leveling performance of the powder coating, so that the water resistance and the leveling performance of the powder coating are greatly improved. The stable storage can be realized.

According to the environment-friendly filtrate reducer for the high-density water-based drilling fluid and the preparation method of the environment-friendly filtrate reducer, a biodegradable natural polymer is used as a rigid framework, a synthetic monomer side chain with strong adsorption, temperature resistance and salt tolerance characteristics is introduced through graft copolymerization, and an environment-friendly cross-linking agent is adopted to construct a proper three-dimensional network structure. According to the design, the product not only inherits the advantages of good tackifying property, environmental protection and no toxicity of natural macromolecules, but also endows the synthesized polymer with excellent temperature resistance, salt resistance and adsorption performance. A three-dimensional network in product molecules can efficiently bind free water, and the viscosity of drilling fluid filtrate is remarkably improved, so that the three-dimensional network has a synergistic effect with a compact filter cake, and an excellent filtrate loss reduction effect is realized; and a plurality of polar groups contained in the plugging agent can strengthen plugging and inhibition on the well wall and improve the stability of the well wall. The whole preparation process is mild in condition, complex equipment is not needed, the used raw materials are green and environment-friendly, and the final product is low in biotoxicity, easy to degrade, excellent in comprehensive performance and controllable in cost.

The invention discloses a preparation method of a rhodium cluster catalyst and a method for catalyzing olefin hydroformylation by using the rhodium cluster catalyst. The preparation method comprises the following steps: firstly, synthesizing a monomer material CTP-6-CHO; then, a certain amount of CTP-6-CHO and p-phenylenediamine are subjected to a self-assembly reaction, and an organic framework material QTD-COF is prepared; then, the prepared QTD-COF is roasted in an Ar atmosphere, and an N and P double-doped carbon-based material (P-NC) is prepared; finally, the P-NC is used as a carrier material, RhCl3. 3H2O is impregnated and adsorbed, high-temperature reduction is conducted in the H2 / Ar atmosphere, and the rhodium cluster supported catalyst Rh / P-NC is prepared. In the hydroformylation reaction of olefin, an Rh / P-NC catalyst and an olefin substrate are added into a high-pressure reaction kettle, a CO / H2 mixed gas (V: V, 1: 1) is introduced, the reaction is performed for 4-12 hours at 100-140 DEG C, the olefin conversion rate is as high as 99.9%, the yield of aldehyde compounds is as high as 97.4%, and the catalyst can be recycled for 10 times and still keeps activity. According to the method, the preparation method of the Rh / P-NC catalyst is simple, Rh clusters are anchored on the surface of a P-NC carrier in a high-dispersion mode, rich catalytic hydroformylation active sites can be provided, and the utilization rate of Rh metal atoms is effectively increased.

A multistep synthesis of an antimicrobial polybutylene adipate terephthalate (PBAT) material comprising synthesising a monomer, co-polymerisation, mixing with a filler and foaming the co-polymer. The

The invention provides a preparation method of a polyaluminum salt-chitosan hybrid polymer anti-dispersing agent for underwater non-dispersible concrete. The preparation raw materials at least comprise 5-10 parts of a polyaluminum salt-chitosan polymer, 6-10 parts of a polycarboxylate superplasticizer, 20-30 parts of calcium formate and 10-20 parts of nano silicon dioxide; the synthesis of the polyaluminum salt-chitosan comprises the following steps: firstly, carrying out carboxylation and acylation modification on chitosan; and then taking the organic matter modified chitosan, acrylamide and inorganic matter poly-aluminum salt as synthesis monomers, adding a redox initiator, synthesizing a poly-aluminum salt-chitosan polymer in an inert gas environment by adopting an aqueous solution polymerization method, and carrying out drying, granulation and crushing treatment. According to the invention, an inorganic flocculant polyaluminum salt and a natural organic flocculant chitosan are connected by taking acrylamide as a bridge for the first time to synthesize an inorganic-organic hybrid high-molecular polymer with more branched chains, and the inorganic-organic hybrid high-molecular polymer is mixed with a water reducing agent and an early strength agent according to a certain proportion; in actual use, the underwater non-dispersible concrete can be endowed with good dispersion resistance and flowing water scouring resistance, and meanwhile, the underwater non-dispersible concrete has good fluidity and setting time meeting construction conditions, and has certain environmental protection significance.

The embodiment of the invention discloses polyacrylate and a preparation method thereof, a glue solution and a UV (ultraviolet) viscosity-reducing film. Synthetic monomers of the polyacrylate comprise a soft monomer and a hard monomer, wherein the soft monomer comprises a first soft monomer, the structural formula of the first soft monomer is shown in the specification, R1 is hydrogen or methyl, when R1 is methyl, R2 is straight-chain or branched-chain alkyl with the number of carbon atoms being 8-20, and when R1 is hydrogen, R2 is branched-chain alkyl with the number of carbon atoms being smaller than or equal to 4 or straight-chain or branched-chain alkyl with the number of carbon atoms being 8-20; and / or the hard monomer comprises one or more of a first hard monomer and acrylonitrile, the structural formula of the first hard monomer is shown in the specification, R3 is hydrogen or methyl, when R3 is methyl, R4 is branched chain alkyl with the carbon atom number of 4 or an organic group with the carbon atom number of 5-10 and containing a cyclic structure, and when R3 is hydrogen, R4 is the organic group with the carbon atom number of 5-10 and containing the cyclic structure. The soft monomer and the hard monomer adopted in the invention can improve the plating solution resistance of the synthesized polyacrylate.

The present application relates to toothpaste tube sheet material technical field, and disclose a kind of suitable for recycling full plastic composite toothpaste tube sheet material and its preparation process, comprising: synthetic monomer quaternary ammonium salt intercalation agent and double quaternary ammonium salt intercalation agent;Based on covalent bond effect, hydrogen bond effect and electrostatic interaction, using monomer quaternary ammonium salt intercalation agent and double quaternary ammonium salt intercalation agent jointly intercalation modification treatment to graphene oxide, intercalation modification type graphene oxide is prepared;Intercalation modification type graphene oxide is dispersed in ethylene-vinyl alcohol copolymer matrix, and organic-inorganic composite modifier is prepared;Organic-inorganic composite modifier is added to single PP material nine-layer co-extrusion film, nine-layer co-extrusion blow molding film process is used, and full plastic composite toothpaste tube sheet material with thickness of 250~300 μm is prepared, which has very excellent mechanical properties and barrier properties, and is suitable for recycling, and can be used to manufacture toothpaste tube packaging material.

The invention relates to the field of polyimide materials, in particular to water-soluble polyamide acid ester, a preparation method thereof and polyimide. Compared with the prior art, the polyamic acid ester provided by the invention is excellent in water solubility, the selection of synthetic monomers is relatively flexible, corresponding water-soluble polyamic acid ester can be synthesized by utilizing a series of simple and easily available polymeric monomers, and the polyamic acid ester is not limited to monomers of water-soluble groups such as hydroxyl and carboxyl in molecules; a series of novel water-soluble polyamic acid ester with good dielectric property, heat-conducting property and the like can be synthesized, the method is simple in preparation process and low in cost, the current environmental protection requirement is met, the mechanical property of the processed, formed and imidized polyamic acid ester is not lost, polyimide with high mechanical property can be prepared, and the polyimide has good application prospects. The requirements of photosensitive polyimide water-based development on water-soluble polyimide application are met.

The present invention relates to a method for preparing a monomer composition for synthesizing recycled plastic, to an apparatus for manufacturing a monomer composition for synthesizing recycled plastic, and to a monomer composition for synthesizing recycled plastic, recycled plastic, and a molded article using same, the method comprising the steps of: depolymerizing a polycarbonate resin in alcohol; monitoring a Raman spectrum by alcohol or an aromatic diol compound obtained from the depolymerization reaction in a reactor in which the depolymerization reaction is progressed; and recovering the aromatic diol compound.

The embodiment of the invention discloses polyacrylate resin, a protective film as well as a preparation method and application of the protective film. Synthetic raw materials of the polyacrylate resin comprise a synthetic monomer, a solvent and an initiator, and the synthetic monomer comprises a monomer containing a cyclic structure and an acrylate monomer with an ester group containing a branched chain structure; based on the total mass of the synthetic monomers, the mass ratio of the monomer containing the cyclic structure is 2wt%-10wt%, and the mass ratio of the acrylate monomer with the ester group containing the branched chain structure is 5wt%-50wt%. According to the invention, a synthetic monomer containing a monomer containing a cyclic structure and an acrylate monomer with an ester group containing a branched-chain structure is subjected to a polymerization reaction in a solvent under the initiation of an initiator, so that the polyacrylic resin is obtained due to the effective ratio of the monomer containing the cyclic structure to the acrylate monomer with the ester group containing the branched-chain structure; the degree of polymerization reaction and the content of a cyclic structure in the polyacrylic resin are controlled, so that the heat resistance and hydrophobicity of the polyacrylic resin are improved; when the polyacrylic resin is used for preparing the protective film, the heat and humidity resistance and plating solution resistance of the protective film can be improved.

The present invention relates to the technical field of research and development of weather-resistant polyester powder coatings, and discloses a weather-resistant bio-based polyester resin, a preparation process and an application, including: synthesizing a light stabilizer monomer containing a phenolic hydroxyl group, and compounding the light stabilizer monomer containing a phenolic hydroxyl group with ZnO nanoparticles to obtain a light stabilizer with a synergistic effect; using the light stabilizer as a modifier, a polybasic acid containing a 2,5-furandicarboxylic acid component and a polyol as synthesis monomers, and preparing a polyester resin through catalytic esterification and vacuum polycondensation reactions; preparing a powder coating from the polyester resin. The present invention provides a process for preparing a polyester resin, and a weather-resistant bio-based polyester resin is prepared. The powder coating prepared from the polyester resin has excellent weather resistance.

The invention discloses a high-strength, wear-resistant composite special plastic and a preparation method thereof in the field of special plastic technology. The plastic comprises the following components in parts by weight: 8-10 parts of a modified first monomer, 1.5-2 parts of a second monomer, 0.25-0.9 parts of a soft segment compound, 5-7.5 parts of a metal salt compound, and 2.8-4.5 parts of polytetrafluoroethylene powder. The invention improves the reaction activity of PEEK matrix polymerization by modifying PEEK synthetic monomers. At the same time, a small amount of soft segment chains containing ether bonds are introduced into the PEEK-based polymer molecular chain to improve the self-lubricating ability of PEEK. By doping with metal ions, a highly stable PEEK matrix material is formed. The PEEK / PTFE composite is adopted to achieve a composite special plastic with high strength, high toughness, low friction coefficient, and low wear rate based on PEEK, which has significant friction reduction and wear resistance in heavy-load, high-speed, and high-temperature friction situations.

The invention relates to the field of polyimide materials, in particular to water-soluble polyamide acid ester, a preparation method thereof and polyimide. Compared with the prior art, the polyamic acid ester provided by the invention is excellent in water solubility, the selection of synthetic monomers is relatively flexible, corresponding water-soluble polyamic acid ester can be synthesized by utilizing a series of simple and easily available polymeric monomers, and the polyamic acid ester is not limited to monomers of water-soluble groups such as hydroxyl and carboxyl in molecules; a series of novel water-soluble polyamic acid ester with good dielectric property, heat-conducting property and the like can be synthesized, the method is simple in preparation process and low in cost, the current environmental protection requirement is met, the mechanical property of the processed, formed and imidized polyamic acid ester is not lost, polyimide with high mechanical property can be prepared, and the polyimide has good application prospects. The requirements of the fields of photosensitive polyimide photoresist, water-soluble polyimide sizing agents and the like on the application of the water-soluble polyimide are met.