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47results about How to "Achieve copolymerization" patented technology
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Preparation method of graphene/polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion
The invention discloses a preparation method of a graphene / polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion. The method comprises the following steps: preparing graphene oxide (GO) by an improved Hummers method, modifying the GO by ethanediamine, enabling reaction with butyl acrylate to introduce double bonds to obtain MGO (ethylenediamined graphene oxide), and performing solution polymerization on the MGO and an acrylic ester monomer in DMF to prepare an MGO / PA solution; and grafting a partial double-bond end-sealed hydroxyl silicone oil modified linear polyurethane prepolymer, which is prepared by in-situ polymerization, on the periphery of a polyhydroxyl hydrophilic hyperbranched polyurethane core by diisocyanate, an oligomer dihydric alcohol and a chain extender and by a hyperbranched polymer chain extending method, mixing with the MGO / PA, and performing polycondensation and crosslinkage to obtain aminated graphene oxide / polyacrylic ester-silicon-containing hyperbranched polyurethane quaternary composite emulsion.
Owner:ANHUI UNIVERSITY
Graphene and preparation method thereof
ActiveCN106477559AGood dispersionGood prospects for biological applicationsGrapheneHigh concentrationEther
The invention provides a preparation method of graphene. The preparation method includes the steps of firstly, preparing graphene oxide; secondly, using a silane coupling agent to modify the graphene oxide; thirdly, adding an initiator in the presence of the modified graphene oxide obtained in the second step, and copolymerizing N-vinyl pyrrolidone and polyethylene glycol monoallyl ether to obtain silane coupling agent modified graphene oxide dispersing liquid using copolymer as the dispersing agent; fourthly, adding gallic acid and tannic acid into the modified graphene oxide dispersing liquid obtained in the third step to perform reduction reaction so as to obtain the end-product graphene. The prepared graphene is promising in bio-application prospect and capable of forming stable and high-concentration dispersing liquid.
Owner:刘果
Self-plasticizing vinyl chloride-based copolymer, method for producing same, composition comprising same, and resin product produced from same
The present invention relates to a self-plasticizing vinyl chloride-based copolymer, a method for preparing the self-plasticizing vinyl chloride-based copolymer, a composition comprising the self-plasticizing vinyl chloride-based copolymer, and a resin product made from the composition. The self-plasticizing vinyl chloride-based copolymer has excellent self-plasticizing properties and processability; and products made from the vinyl chloride-based copolymer also have excellent biological properties. The invention provides the self-plasticizing vinyl chloride-based copolymer. The self-plasticizing vinyl chloride-based copolymer comprises a structural unit (a) based on vinyl chloride and a structural unit (b) based on a monomer represented by formula (1): CH2 = CR1COO (R2O) xR3 (1), whereinR1 is at least one selected from the group consisting of hydrogen and a linear or branched alkyl group having 1-6 carbon atoms, and R2 is at least one selected from the group consisting of hydrogen and a branched alkyl group having 1-6 carbon atoms. The number x of repeating units is an integer selected from 2-20, each R2 is selected from a linear or branched alkylene group having 2-10 carbon atoms, and the R2 may be the same or different; and R3 is at least one selected from the group consisting of hydrogen and a linear or branched alkyl group having 1-4 carbon atoms.
Owner:BEIJING UNIV OF CHEM TECH
Activity-controllable catalysis system for catalyzing inner ester ring opening polymerization
The invention discloses an activity-controllable catalysis system for catalyzing inner ester ring opening polymerization, and belongs to the technical field of macromolecular synthesis. Inner ester serving as a monomer raw material is subjected to ring opening polymerization under the synergetic catalysis of Lewis acid and Lewis alkali under a condition of no use of a solvent or use of an organic solvent. The activity-controllable catalysis system has the advantages of readily available raw material, convenience for operation, mild reaction condition, quickness, high conversion rate and the like; furthermore, the use amount of a catalyst is small; the molecular weight of an obtained polymer is controllable, and the molecular weight distribution is narrow; the activity-controllable catalysis system realizes activity-controllable polymerization, and can realize copolymerization among different inner esters.
Owner:JILIN UNIV
Large-steric-hindrance neutral nickel catalyst, preparation method and application in preparation of ethylene/polar monomer copolymers
The invention relates to a large-steric-hindrance neutral nickel catalyst, a preparation method and an application in preparation of an ethylene / polar monomer copolymer. A phenol-phosphorous mono-anionic ligand with different substituents of R1, R2 and R3 is dissolved in a good solvent and added to a good solvent of a metal nickel source for a reaction, and the catalyst is obtained, and X-ray single crystal diffraction indicates that an obtained complex adopts a plane quadrangle structure. The synthesized catalyst single component is used for triggering ethylene polymerization. An obtained polymer is a high-molecular-weight linear polymer with the molecular weight up to 770 kg / mol. Copolymerization of polar monomers such as ethylene, methyl acrylate and the like is realized, the copolymer with different polar monomer insertion rates is obtained, and the polar monomer insertion rate is up to 8mol%. Experimental results indicate that the polar monomers are inserted in polymer chain tails and molecular chains, which is the major breakthrough of the neutral nickel catalyst in the olefin polymerization history.
Owner:TIANJIN UNIV
Polycarbonate containing nonlinear optical chromophores, synthesis method and application thereof
InactiveCN103834000AAchieve copolymerizationControl numberNon-linear opticsSynthesis methodsGlass transition
The present invention relates to a polycarbonate containing nonlinear optical chromophores, a synthesis method and an application thereof. According to the present invention, bischloroformate and nonlinear optical chromophores containing double hydroxyl groups are subjected to copolymerization so as to successfully introduce the nonlinear optical chromophore molecule into the polymer chain segment of the polycarbonate, and concurrently a bisphenol monomer is introduced to adjust the number of the nonlinear optical chromophore molecules in the chain segment so as to effectively prepare the suspension connection type polycarbonate electro-optic material containing a certain amount of the nonlinear optical chromophore molecules; after the polycarbonate containing the nonlinear optical chromophores is dissolved with an organic solvent and then is subjected to film coating, the maximum electro-optic coefficient of the prepared polarized electro-optic polymer film is 75 pm / V, wherein the prepared electro-optical material has a high glass transition temperature, such that the nonlinear optical chromophore molecules have good orientational stability in the material; and the polycarbonate containing the nonlinear optical chromophores has the following structure.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Fluorine-containing syndiotactic polystyrene and preparation method thereof
The invention relates to fluorine-containing syndiotactic polystyrene and a preparation method thereof, belongs to the technical field of preparation of polymers and solves the technical problems of extremely low polymerization rate and transformation rate of current fluorine-containing polystyrene in coordination polymerization. The fluorine-containing syndiotactic polystyrene comprises a repetition unit with a structure expressed as formula (I) and a repetition unit with a structure expressed as formula (II). The formula (I) and the formula (II) are shown in the description. Experimental results show that the syndiotactic selectivity of the fluorine-containing syndiotactic polystyrene is not less than 90%; the content of structure units of the fluorine-containing styrene can be randomly adjusted between 0 and 100%. The preparation method of the fluorine-containing syndiotactic polystyrene firstly achieves high-activity, high-transformation-rate and high-selectivity coordination polymerization of the fluorine-containing styrene for the first time, achieves copolymerization of the fluorine-containing styrene and styrene under any monomer ratio for the first time, enables the insertion rate of the fluorine-containing styrene to be freely regulated and controlled, and breaks through the limitation that the conventional fluorine-containing styrene is low in possibility of coordination polymerization; through the method, the complete transformation of the monomers can be achieved.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Synthesis method of clustered peptide catalyzed by rare earth catalyst and clustered peptide synthesized by using synthesis method
The invention discloses a synthesis method of a clustered peptide catalyzed by a rare earth catalyst. The method comprises the steps of catalyzing ring opening polymerization between N-substituted glycine-N-carboxylic acid anhydride and N-substituted glycine-N-thioanhydride by taking rare earth borohydride, alkoxyl rare earth or aryloxy rare earth as a catalyst; reacting at the temperature of 0-100 DEG C for 12h to 4d to prepare the clustered peptide with high molecular weight. The catalyst used in the synthesis method is cheap, easy to prepare and relatively high in catalytic activity; the prepared clustered peptide is high in molecular weight up to 70000, high in polymerization degree up to 1000 and narrow in molecular weight distribution range lower than 1.4.
Owner:ZHEJIANG UNIV
Terpolymer of diazoacetate, carbethoxy cabbeen and cyclic lactone and preparation method thereof
The invention discloses a method for copolymerizing diazoacetate and cyclic lactone. The specific preparation method comprises the following steps of: reacting the diazoacetate and the cyclic lactone as monomers for a period of time under microwave irradiation in the presence of an initiator and under the condition of inert gas protection, thereby obtaining the polymer. The method is free of catalyst and solvent, simple and convenient to prepare, easy in parameter control and fast in reaction, and the prepared polymer is large in molecular weight and a brand new path is provided for the copolymerization reaction of the cyclic lactone and free radicals. The polymer prepared by the method provided by the invention is expected to be widely applied to fields of rubber, plastics and the like.
Owner:WUHAN UNIV
Emulsion paint resin of aminol epoxy solidified at room-temperature and its synthesis method
An amino / epoxy type emulsion resin for the paint solidified at room-temp is prepared from the copolymer emulsion containing primary amine radical and the emulsion fo epoxy-terminated compound which can cross-link with amino at ordinary temp. through synthesizing the compound A with dual bond and primary amine radical, synthesizing the copolymer emulsion containing said compound A, preparing the epoxy-terminated compound compound emulsion B, and mixing A with B in mole ratio of 1:1. Its advantages are low environmental pollution and low content of VOCs in paint.
Owner:TIANJIN UNIV
Method for synthesizing high-molecular-weight polypeptide through catalysis by using hydroborated rare earth as catalyst
The invention relates to a method for synthesizing a high-molecular-weight polypeptide through catalysis by using hydroborated rare earth as a catalyst, which is characterized by comprising the following steps: synthesizing an alpha-amino acid-N-carboxyl anhydride monomer by using amino acid and triphosgene as initial raw materials, and catalyzing the alpha-amino acid-N-carboxyl anhydride monomer to carry out ring opening polymerization by using the hydroborated rare earth Ln(BH4)3 as the catalyst to obtain the high-molecular-weight polypeptide. Compared with prior art, the invention has the following outstanding advantages: compared with other catalysts, the catalyst used by the invention is single-component and homogeneous, and the catalyst has the following characteristics: 1. the catalyst is cheap and easy to obtain and has high activity; 2. the high-molecular-weight polypeptide can be prepared by using the catalyst, and the weight average molecular weight can be higher than 120 thousand; 3. the prepared polypeptide has narrow molecular weight distribution (not more than 1.5); and 4. polypeptides in different types can be synthesized, and the copolymerization among different polypeptides also can be realized.
Owner:ZHEJIANG UNIV
Fluorine-containing acrylate copolymer synthesis method
ActiveCN106947016AAvoid the disadvantages of lower fluoromonomer polymerization conversionEfficient removalSynthesis methodsMethylmethacrylates
The invention discloses a fluorine-containing acrylate copolymer synthesis method. The fluorine-containing acrylate copolymer synthesis method comprises the following steps of: obtaining mixed monomer miniemulsion of (perfluorooctyl) ethyl acrylate, n-butyl methacrylate and methylmethacrylate by taking methacryloyloxyethyl trimethyl ammonium chloride (DMC) as a cation emulsifying agent and cetane as co-stabilizer according to a mini-emulsification technology, and carrying out miniemulsion copolymerization under the initiation action of AIBN (2,2-azobisisobutyronitrile) to obtain miniemulsion of a fluorine-containing acrylate copolymer. The fluorine-containing acrylate copolymer has the beneficial effects that the fluorine-containing acrylate copolymer has a relatively high fluorine-containing monomer conversion rate; the cost is reduced; the utilization rate of a fluorine-containing monomer is effectively increased; and after polymerization is ended, an emulsifying agent can be removed by a simple and convenient demulsification precipitation method to obtain the fluorine-containing copolymer product with the relatively high purity, so that the copolymer has relatively good water and oil repellency and antifouling property.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Polyurethane internal wall building mildew-proof paint
InactiveCN106700886AImprove solubilityActs as a film-forming aidFireproof paintsAntifouling/underwater paintsWater basedAcrylic resin
The invention discloses polyurethane internal wall building mildew-proof paint. The polyurethane internal wall building mildew-proof paint is mainly prepared from water-cured polyurethane, water-based acrylic resin and a mildew-proof agent; disadvantages of single polyurethane or single polyacrylic resin, such as poor stability, white thickening property and gloss retention of a film, high solid content and a narrow application range, are overcome; the main components have a complementary action on properties. The composite paint combines advantages of the polyurethane and the acrylic resin and has the characteristics of mildew prevention, wearing resistance, corrosion resistance and brightness, softness and elasticity, good water resistance and mechanical properties, excellent weather resistance and the like, and also has high glossiness, high elasticity and excellent weather resistance. Compared with other traditional polyurethane paint, the polyurethane internal wall building mildew-proof paint has the advantages of convenience for construction, no toxin and no pollution, and is more environment-friendly and the like.
Owner:广西宾阳县荣良农业科技有限公司
Novel benzimidazole ionic monomer and preparation method thereof
InactiveCN107602478ALess likely to attackPlay a shielding roleOrganic chemistryFuel cellsDouble bondIon-exchange membranes
The invention discloses a novel benzimidazole ionic monomer and a preparation method thereof. The structural formula of the monomer is shown in a following image, wherein R is H or a methyl group, andthrough delocalization of charges and a shielding effect of the methyl group in a molecule, the benzimidazole monomer can be stable under an alkaline condition; in addition, the ionic monomer which contains double bonds makes it easier to design polymers with other topological structures so that copolymerization of the monomer and styrene can be achieved, and by adjusting the proportion of the monomer in the copolymerization and regulating the ratio of hydrophilic groups to hydrophobic groups, anion exchange membranes with different performance can be obtained.
Owner:ZHEJIANG UNIV
Vinyl chloride-based copolymer, method for preparing vinyl chloride-based copolymer, composition comprising vinyl chloride-based copolymer, and resin product made from composition
ActiveCN112574346AExcellent self-plasticizingImprove the lubrication effectCarbon numberPolymer science
The present invention relates to a vinyl chloride-based copolymer, a method for preparing the vinyl chloride-based copolymer, a composition comprising the vinyl chloride-based copolymer, and a resin product made from the composition. The vinyl chloride-based copolymer includes a structural unit (a) based on vinyl chloride, a structural unit (b) based on a monomer represented by a formula (1) of CH2=CR1COO(R2O)xR3, and a structural unit (c) based on a monomer represented by a formula (2) of CH2=CHOR4; in the formula (1), R1 is selected from hydrogen and a linear or branched alkyl group having 1to 6 carbon atoms, the number x of repeating units is an integer selected from 2-20, each R2 is selected from a linear or branched alkylene group having 2-10 carbon atoms, the multiple R2s be the same or different, R3 is selected from hydrogen and a linear or branched alkyl group having 1 to 4 carbon atoms; and in the formula (2), R4 is selected from a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched cycloalkyl group having 3 to 10 carbon atoms, and a linear or branched hydroxyalkyl group having 1 to 10 carbon atoms, the groups may be substituted with a halogenatom, and the hydrogen atom in the formula (2) may also be substituted by a halogen atom.
Owner:BEIJING UNIV OF CHEM TECH
Preparation method of lignin modified environment-friendly urea-formaldehyde resin adhesive
ActiveCN112625627AImprove performanceAchieve copolymerizationAldehyde/ketone condensation polymer adhesivesGraft reactionLignosulfonates
The invention discloses a preparation method of a lignin modified environment-friendly urea-formaldehyde resin adhesive. The method comprises the following steps: (1) dissolving lignosulfonate to obtain a lignin solution, and adding a biological enzyme and a mediator into the lignin solution to jointly depolymerize lignin to obtain a depolymerized lignin solution; (2) adjusting the depolymerized lignin solution to be weakly alkaline, and adding a silane coupling agent for grafting reaction to obtain a lignin modified solution; and (3) adding formaldehyde and urea into the lignin modified solution to react so as to obtain the lignin modified environment-friendly urea-formaldehyde resin adhesive. According to the invention, the preparation method of the lignin-modified environment-friendly urea-formaldehyde resin adhesive is mild in reaction condition, environmentally friendly and free of pollutants, graft modification is conducted on ash, copolymerization of lignin, ash particles and urea-formaldehyde resin is achieved, the usage amount of formaldehyde in the urea-formaldehyde resin synthesis process is reduced, and the problems of high formaldehyde release amount, poor environmental friendliness of the urea-formaldehyde resin adhesive and the like are solved.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Fluorine-containing vinyl chloride-based copolymer, method for producing fluorine-containing vinyl chloride-based copolymer, composition comprising fluorine-containing vinyl chloride-based copolymer, and resin product produced from composition
ActiveCN112574347AExcellent self-plasticizingExcellent machining lubricityCarbon numberPolymer science
The present invention relates to a fluorine-containing vinyl chloride-based copolymer, a method for preparing the fluorine-containing vinyl chloride-based copolymer, a composition comprising the fluorine-containing vinyl chloride-based copolymer, and a resin product made from the composition. The vinyl chloride-based copolymer comprises a structural unit (a) based on vinyl chloride, a structural unit (b) based on a monomer represented by a formula (1) of CH2=CR1COO(R2O)xR3, and a structural unit (c) based on a monomer represented by a formula (2) of CH2=CR4COOR5. In the formula (1), R1 is selected from hydrogen and a linear or branched alkyl group having 1-6 carbon atoms, the number x of repeating units is an integer selected from 2-20, each R2 is selected from a linear or branched alkylene group having 2-10 carbon atoms, and the multiple R2s may be the same or different, and R3 is selected from hydrogen and a linear or branched alkyl group having 1-4 carbon atoms. In the formula (2),R4 is selected from hydrogen and a methyl group, R5 is selected from a linear or branched fluoroalkyl group having 1-18 carbon atoms, a fluorocycloalkyl group having 3-18 carbon atoms, and a fluorophenyl group, and the hydrogen atoms in formula (2) may be substituted by halogen atoms.
Owner:BEIJING UNIV OF CHEM TECH
Polyurethane building wall edge and corner coating and production method thereof
InactiveCN106675367AHigh mechanical strengthImprove adhesionAntifouling/underwater paintsPaints with biocidesWater leakageAcrylic resin
The problem that a coating used in the prior art has an effect on a large area of building wall, while not always has a function of preventing and controlling water leakage at butt seams and corners, and particularly water leakage is prone to happen at the basement and some seams is always hard to solve. The provided coating is high in adhesive force and good in chemical resistance, acid-base resistance, water resistance, solvent resistance, temperature resistance, weathering resistance and stain resistance, provides a coating film long in life, and can protect the building edges and corners from leaking or cracking. The coating comprises main components of water cured polyurethane, aqueous acrylic resin and additives. The polyurethane building coating is good in bonding property, and is eco-friendly, safe, pollution-free, and toxicity-free.
Owner:GUANGXI JISHUN ENERGY TECH
A catalytic system for ring-opening polymerization of lactones with controllable activity
The invention discloses an activity-controllable catalysis system for catalyzing inner ester ring opening polymerization, and belongs to the technical field of macromolecular synthesis. Inner ester serving as a monomer raw material is subjected to ring opening polymerization under the synergetic catalysis of Lewis acid and Lewis alkali under a condition of no use of a solvent or use of an organic solvent. The activity-controllable catalysis system has the advantages of readily available raw material, convenience for operation, mild reaction condition, quickness, high conversion rate and the like; furthermore, the use amount of a catalyst is small; the molecular weight of an obtained polymer is controllable, and the molecular weight distribution is narrow; the activity-controllable catalysis system realizes activity-controllable polymerization, and can realize copolymerization among different inner esters.
Owner:JILIN UNIV
Application and usage of vanadium series catalyst of one-class bidentate N, O coordination
The invention provides an application and a usage of vanadium series catalyst of one-class bidentate N, O coordination. From the angle of preventing functional monomer from poisoning catalyst, the invention selects the vanadium series olefinic polymerization catalyst of one-class bidentate N, O coordination to realize the copolymerization of ethylene and polar monomer under the action of cocatalyst and promoter after different protecting agents pretreat the polar monomer. Through adjusting copolymerization conditions, the invention obtains a series of functional polyolefine with controllable comonomer insertion rate and molecular weight. Especially, the invention realizes the copolymerization between ethylene and 10-hendecene-1-alcohol, between ethylene and 5-hexene-1-alcohol, between ethylene and 3-butylene-1-alcohol or between ethylene and 10-methyl undecylenate.
Owner:CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
A kind of preparation method of lignin-modified environment-friendly urea-formaldehyde resin adhesive
ActiveCN112625627BImprove performanceAchieve copolymerizationAldehyde/ketone condensation polymer adhesivesSulfonateGraft reaction
The invention discloses a preparation method of a lignin-modified environmental-friendly urea-formaldehyde resin adhesive, which comprises the following steps: (1) dissolving lignosulfonate to obtain a lignin solution, and then adding biological enzymes into the lignin solution Combined with the mediator to depolymerize lignin to obtain a depolymerized lignin solution; (2) adjust the depolymerized lignin solution to be weakly alkaline, and add a silane coupling agent for grafting reaction to obtain a lignin modified solution; (3 ) Adding formaldehyde and urea to the lignin modification solution to react to obtain the lignin modified environmental-friendly urea-formaldehyde resin adhesive. The preparation method of the lignin-modified environment-friendly urea-formaldehyde resin adhesive of the present invention has mild reaction conditions, is environmentally friendly, does not produce pollutants, and grafts and modifies its ash to realize the copolymerization of lignin and ash particles with urea-formaldehyde resin and reduce urea-formaldehyde The amount of formaldehyde used in the resin synthesis process solves the problems of high formaldehyde release and poor environmental protection of urea-formaldehyde resin adhesives.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Binuclear vanadium catalyst as well as preparation method and application thereof
ActiveCN114395058AEasy to synthesizeEasy to operateBulk chemical productionPolymer sciencePolyolefin
The invention discloses a binuclear vanadium catalyst and a preparation method and application thereof, the structural general formula of the binuclear vanadium catalyst is shown in the specification, in the structural general formula, the structural formula of Linker is shown in the specification, and R1, R2, R3, R4, R5, R6, R '1, R' 2, R '3, R' 4, R '5 and R' 6 are respectively one or more of a hydrogen atom, an alkyl group, an alkoxy group, a fluorine atom, a bromine atom and a chlorine atom. The binuclear vanadium catalyst is used for catalyzing the (co) polymerization of ethylene and polar monomers thereof, the steric hindrance and the electronic effect of the catalyst are accurately regulated and controlled through the regulation of a ligand skeleton, the polymerization reaction process is controlled, and a functionalized polyolefin material with high polar monomer insertion rate and high molecular weight is obtained.
Owner:HEFEI UNIV OF TECH
Hindered Lewis Acid-Base Pair--flp Catalyzed Living Polymerization of Vinyl Polar Monomers
Belonging to the technical field of polymer synthesis, the invention relates to a frustrated Lewis pair FLP catalyzed vinyl polar monomer living polymerization method. A vinyl polar monomer is adoptedas the monomer raw material for conjugate addition polymerization under the synergic catalysis of a frustrated Lewis pair, in terms of mole, Lewis acid is greater than Lewis base and smaller than themonomer, and the ratio of the monomer to the Lewis base is 20-3200:1, the reaction temperature is room temperature, and the reaction time is 30sec-24h. The method provided by the invention has the characteristics of easily available raw materials, convenient operation, mild reaction conditions, rapidity, high conversion rate, wide monomer adaptability and the like, also the catalyst dosage is small, and the initiation efficiency is close to 100%, therefore the method is living controlled polymerization, and can realize random copolymerization and block copolymerization between different polarmonomers.
Owner:JILIN UNIV
A high-permeability permeable concrete binder
ActiveCN110054472BMeet strength requirementsMeet water permeability requirementsPolyvinyl alcoholBone cement
The invention provides a high-permeability permeable concrete cement. The main raw materials include magnesium phosphate cement, polyorganosiloxane, epoxy resin, phenolic resin, hydroxypropyl acrylate, acrylamide, cellulose ether, and active silica powder, bone cement powder, gelatin, polyvinyl alcohol, pentaerythritol, calcium sulfoaluminate hydrate, calcium carbonate whiskers, sodium dodecylbenzenesulfonate, zinc 2,4-pentadienoate, coupling agent, Defoamer and water, etc., have excellent bonding effect, meet the strength requirements of the road surface, and can meet the water permeability requirements of high-permeability permeable concrete.
Owner:浙江衢州鼎盛建材有限公司
Terpolymer of diazoacetate, carbethoxy cabbeen and cyclic lactone and preparation method thereof
The invention discloses a method for copolymerizing diazoacetate and cyclic lactone. The specific preparation method comprises the following steps of: reacting the diazoacetate and the cyclic lactone as monomers for a period of time under microwave irradiation in the presence of an initiator and under the condition of inert gas protection, thereby obtaining the polymer. The method is free of catalyst and solvent, simple and convenient to prepare, easy in parameter control and fast in reaction, and the prepared polymer is large in molecular weight and a brand new path is provided for the copolymerization reaction of the cyclic lactone and free radicals. The polymer prepared by the method provided by the invention is expected to be widely applied to fields of rubber, plastics and the like.
Owner:WUHAN UNIV
Fluorine-containing syndiotactic polystyrene and preparation method thereof
ActiveCN106832083BThe content can be adjusted arbitrarilyHigh activityPolymer scienceCoordination polymerization
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Vinyl chloride copolymer, its preparation method, its composition and its resin product
ActiveCN112574346BImprove the lubrication effectAdjustable mechanical propertiesCarbon numberPolymer science
The present invention relates to a vinyl chloride-based copolymer, a preparation method thereof, a composition comprising the same, and a resin article made from the composition. This vinyl chloride-based copolymer includes a structural unit (a) based on vinyl chloride, a structural unit (b) based on a monomer represented by the following formula (1) and a structure based on a monomer represented by the following formula (2) Unit (c), CH 2 =CR 1 COO(R 2 O) x R 3 (1) In formula (1), R 1 selected from hydrogen and straight-chain or branched-chain alkyl groups with 1 to 6 carbons; the number of repeating units x is an integer selected from 2 to 20, and each R 2 Selected from linear or branched alkylene groups with carbon numbers of 2 to 10, which may be the same or different; R 3 Selected from hydrogen and straight-chain or branched-chain alkyl groups with 1 to 4 carbons, CH 2 = CHOR 4 (2) In formula (2), R 4 A straight chain or branched chain alkyl group with 1 to 10 carbons, a straight chain or branched cycloalkyl group with 3 to 10 carbons, and a straight chain or branched chain with 1 to 10 carbons hydroxyalkyl groups.
Owner:BEIJING UNIV OF CHEM TECH
High-permeability permeable concrete cement agent
ActiveCN110054472AMeet strength requirementsMeet water permeability requirementsEpoxyMagnesium phosphate
The invention provides a high-permeability permeable concrete cement agent mainly comprises magnesium phosphate cement, polysiloxane, epoxy resin, phenolic resin, hydroxypropyl acrylic acid ester, acrylamide, cellulose ether, active silica powder, bone glue powder, gelatin, polyvinyl alcohol, pentaerythrite, calcium sulphoaluminate hydrate, calcium carbonate whiskers, sodium dodecyl benzene sulfonate, 2,4-zinc pentadienate salt, a coupling agent, a defoaming agent, water and the like. The high-permeability permeable concrete cement agent has excellent bonding effect, requirements of pavement strength can be met, and the permeable requirement of high permeability permeable concrete can be met.
Owner:浙江衢州鼎盛建材有限公司
A Living Polymerization System Based on Phosphine-Based Catalyzed Synthesis of Ultra-High Molecular Weight Polymers
The invention provides an active polymerization system based on synthesis of ultrahigh molecular weight polymer catalyzed by phosphine alkali, which belongs to the technical field of polymer synthesis. In an organic solvent, a vinyl polar monomer is used as a monomer raw material, and conjugate addition polymerization is performed under synergic catalysis of Lewis acid and Lewis base, wherein theLewis base is a phosphine compound. The active polymerization system based on synthesis of ultrahigh molecular weight polymer catalyzed by phosphine alkali has the advantages of easy raw material obtaining, convenient operation, mild reaction conditions, high speed, high conversion rate, wide monomer adaptability, small catalyst usage amount, controllable molecular weight of polymers, narrow molecular weight distribution, and activity-controlled polymerization, and copolymerization between monomers of different polarities can be realized.
Owner:JILIN UNIV
Synthetic method of rare earth catalyst catalyzed clustering peptide and synthesized clustering peptide
The invention discloses a method for synthesizing clustered peptides catalyzed by a rare earth catalyst. In the method, rare earth borohydride, alkoxy rare earth or aryloxy rare earth are used as catalysts to catalyze N-substituted glycine-N-carboxylic acid anhydride and N-substituted glycine - Ring-opening polymerization of N-thiocarboxylic acid anhydride, reacting at a temperature of 0°C to 100°C for 12 hours to 4 days to prepare high molecular weight clustered peptides. The catalyst used in the invention is cheap and easy to prepare, has high catalytic activity, and the prepared polymerized peptide has a high molecular weight of up to 70,000, a high degree of polymerization of up to 1000, and a narrow molecular weight distribution of less than 1.4.
Owner:ZHEJIANG UNIV
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