47results about How to "Achieve copolymerization" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.