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51results about How to "The polymerization reaction conditions are mild and controllable" patented technology

Gemini surface activity initiator and preparation method thereof

The invention relates to a gemini surface activity initiator and a preparation method thereof. An amphiphilic compound containing polyhydroxyl amine and dioctyl groups is firstly synthesized, the compound has the high characteristics of emulsifying oily monomers, hydrophilic tertiary amine can generate a redox reaction with potassium persulfate at room temperature, cation free radicals are firstly formed on nitrogen atoms and then converted into carbon free radicals at the adjacent positions, generation of the free radicals can be repeated for multiple times and flexibly controlled, a serially-initiated multiphase concatenating polymerization mode is achieved, polymerization of styrene and vinyl acetate and polymerization of styrene and acrylamide are initiated on a water-oil interface in sequence, and then a segmented copolymer is obtained. Experiments prove that the feed ratio of monomers is quite consistent with the component ratio of the copolymer, that is to say, the initiation efficiency of the initiator is very high, this mode of polymerization reaction is mild and controllable in condition and low in energy consumption, no other organic solvent or emulsifier is used, the product is pure, and the requirements of green chemistry are totally met.
Owner:NINGBO UNIV

Polyhydroxy polyamine surface activity initiator and preparing method thereof

The invention discloses a polyhydroxy polyamine surface activity initiator and a preparing method thereof. A tri-tert amine compound containing polyhydroxy group and cetyl group is synthesized and is made to have the characteristics of a surfactant; meanwhile, redox reaction can be conducted between tertiary amine and potassium persulfate at normal temperature, cation free radicals are formed on nitrogen atoms firstly and then converted into carbon free radicals at adjacent positions, free radicals can be generated repeatedly under flexible control, multiphase tandem connection polymerization can be achieved, polymerization between styrene and methyl acrylate and polymerization between styrene and acrylamide are triggerned on a water / oil interface in sequence, and a corresponding segmented copolymer is obtained; experiments prove that the rate of charge of a monomer is quite consistent with the component ratio of the copolymer, which implies that the ignition efficiency of the initiator is high. The polymerization reaction condition of the mode is mild and controllable, energy consumption is low, no other organic solvent or emulgator is used, the product is pure, and the requirement of green chemistry is completely met.
Owner:NINGBO UNIV

Bi-benzene-sulfonate interface initiator and preparing method thereof

The invention relates to a bi-benzene-sulfonate interface initiator and a preparing method thereof. A tertiary amine compound with bi-benzene-sulfonate anions and bi-dodecyl is synthesized, and the characteristics of a surfactant are shown; meanwhile, tertiary amine and potassium peroxodisulfate can be subjected to a redox reaction at the normal temperature, cation free radicals are formed on nitrogen atoms and then converted into carbon free radicals at adjacent positions, generating of the free radicals can be repeated, control is flexible, multi-phase concatenation polymerization is achieved, polymerization of styrene and butyl acrylate and polymerization of styrene and N,N-dimethyl acrylamide are sequentially triggered on a water / oil interface, and a multi-segmented copolymer is obtained. An experiment proves that the feeding ratio of monomer and the composition ratio of the copolymer are quite coincident, it shows that the triggering efficiency of the initiator is high, the polymerization reaction in the mode is moderate and controllable in condition and low in energy consumption, other organic solvents and emulsifiers are avoided, the product is pure, and the requirements of green chemistry are completely met.
Owner:NINGBO UNIV

Green preparing method of anionic polyvinylidene fluoride membrane material

The invention relates to a green preparing method of vinylidene fluoride / acrylic copolymer which is used as a separating membrane material. A copolymer synthetic technique is formed based on polymerization of free radicals in aqueous / oil two phase interface, a gemini type anionic surface activity initiator is specially used to be subjected to redox reaction with potassium persulfate at normal temperature, generation of free radicals in the interface is repeated for a lot of times, an independent polymerization reaction between vinylidene fluoride and acrylic acid is triggered, and a multi-segment copolymer is formed by connecting two kinds of chain segments through a initiator molecular. Experiments show that when a pH value of an aqueous-phase medium is in the range of 4.0-4.5, the material feeding ratio of a monomer coincides exactly with a component ratio of the copolymer, the content of acrylic chain segments in the copolymer is adjustable in the range of 5-25 wt.%, and the polymerization reaction in this mode is mild and controllable in condition, and low in energy consumption; meanwhile, other organic solvents and emulgators are not needed, products are pure, and the thus the preparing method of the anionic polyvinylidene fluoride membrane material totally conforms to demands for green chemistry.
Owner:NINGBO UNIV

Polymerization method for toluylene bisazo dye

The invention relates to a polymerization method for toluylene bisazo dye. An amphipathy compound containing a fluorescein perssad and a tertiary amine structure is synthesized and can be used as an initiator polymerized with free radicals, tertiary amine can be subjected to a redox reaction with potassium persulfate under the normal temperature, active free radicals are produced repeatedly, oil soluble monomer vinyl acetate polymerization is initiated on a water / oil interface, the obtained product is hydrolyzed to obtain a polymer containing a hydrophilic polyvinyl alcohol chain segment, andtherefore the purpose of toluylene bisazo dye polymerization is achieved. In this mode, functionalization and polymerization reactions do not interfere with each other, the operation degree of freedomis large, the product varieties are multiple, the polymerization reaction conditions are mild, no organic solvent or emulsifier is adopted, and the requirement for green chemistry is met.
Owner:NINGBO UNIV

Green preparation method of cationic type PVDF (Polyvinylidene Fluoride) membrane material

The invention relates to a green preparation method of a cationic type PVDF (Polyvinylidene Fluoride) membrane material. The green preparation method is based on a copolymer synthetic technology formed by water / oil two-phase interface free radical polymerization, a Gemini type cationic surface activity initiator is specifically used so as to be in redox reaction with potassium persulfate, free radicals can be generated on an interface through multiple replication, a polymerization reaction of vinyl fluoride and dimethyl diallyl ammonium chloride is initiated, and two chain segments are connected together in series through initiator molecules to form a poly-segment copolymer. An experiment verifies that when the pH (Potential of Hydrogen) value of an aqueous medium is ranged from 4.0 to 4.5, a feed ratio of monomers and a composition ratio of the copolymer is very consistent, and the content of a dimethyl diallyl ammonium chloride chain segment in the copolymer is ranged from 5 wt percent to 25 wt percent and can be regulated; the polymerization reaction in the mode has mild and controllable condition and low energy consumption, other organic solvents and emulsifiers are not used, the product is pure, and the requirements of green chemistry are completely met.
Owner:NINGBO UNIV

Method for preparing hydrophilic polyvinylidene fluoride membrane materials in green manner

The invention relates to a method for preparing vinylidene fluoride / N, N-dimethylacrylamide copolymers in a green manner. The vinylidene fluoride / N, N-dimethylacrylamide copolymers are used as separation membrane materials. The method has the advantages that the method is a copolymer synthesis technology based on water / oil two-phase interfacial free radical polymerization, oxidation-reduction reaction is carried out by special Gemini surface active initiators and potassium persulfate at the normal temperature, free radicals are repeatedly generated on interfaces, independent polymerization reaction between vinylidene fluoride and N, N-dimethylacrylamide is initiated, two types of chain segments are connected with each other by initiator molecules in series to form the segmented copolymers, the feed ratios of monomers are extremely consistent with component ratios of the copolymers when pH (potential of hydrogen) values of water-phase media are within the ranges of 4.0-4.5 as proved by experiments, the content of N, N-dimethylacrylamide chain segments in the copolymers is adjustable in the ranges of 5-25 wt.%, polymerization reaction conditions in the modes are mild and controllable, the method is low in energy consumption, other organic solvents or emulsifiers can be omitted, products are pure, and requirements on green chemistry can be completely met.
Owner:NINGBO UNIV

Polymerization method of reactive black dye KN-B

The invention relates to a polymerization method of reactive black dye KN-B. An amphiphilic compound containing a reactive black group and a tertiary amine structure is synthesized and can be used asan initiator for free radical polymerization, tertiary amine of the amphiphilic compound can have a redox reaction with potassium persulfate at normal temperature to generate active free radicals multiple times, the polymerization of oil-soluble monomers isoprene and the polymerization of water-soluble monomers isopropyl acrylamide can both be initiated on a water / oil interface, and therefore thepurpose of polymerizing the reactive black KN-B dye is achieved; in the mode, the functionalization and the polymerization reaction do not interfere with each other, the operation freedom degree is large, the types of products are various, the polymerization reaction conditions are mild, organic solvents or emulsifiers are not used, and the requirements for green chemistry are met.
Owner:NINGBO UNIV

A kind of green chemical preparation method of vinyl chloride/butyl acrylate copolymer

The invention relates to a green preparation method of a vinyl chloride / butyl acrylate copolymer used as a thermoplastic elastomer. The preparation method is based on a synthesis technology of a copolymer formed by interfacial free-radical polymerization of water / oil two-phases. Based on a copolymer synthesis technology through water / oil two-phase interfacial free-radical polymerization, a polyhydroxy polyamine surface active initiator and potassium persulphate are subjected to an oxidation reduction reaction at normal temperature, free radicals are repeatedly generated on the interface and independent polymerization of vinyl chloride and butyl acrylate is initiated. Through molecules of the initiator, two chain segments are connected in series so as to form a poly-segment copolymer. It is proved through experiments that pH of an aqueous medium is within the range of 4-4.5, feed ratio of a monomer is very consistent with composition ratio of the copolymer and content of the butyl acrylate chain segments in the copolymer is adjustable within the range of 10-42wt%. According to the mode of polymerization reaction, conditions are mild and controllable, energy consumption is low, other organic solvents or emulsifiers are not used, and the product is pure. The method completely meets the requirement of green chemistry.
Owner:NINGBO UNIV

A kind of polyhydroxy polyamine surfactant initiator and preparation method thereof

The invention relates to a polyhydroxy polyamine surface active initiator and a preparation method thereof. Synthesize a tri-tertiary amine compound containing polyhydroxyl and hexadecyl, so that it exhibits the characteristics of a surfactant. At the same time, the tertiary amine can undergo a redox reaction with potassium persulfate at room temperature, and first form a cation on the nitrogen atom Free radicals are then converted into carbon free radicals at adjacent positions. The generation of free radicals can be repeated many times and flexibly controlled to achieve multi-phase series polymerization. Styrene and methyl acrylate and Styrene and acrylamide are polymerized to obtain corresponding multi-block copolymers. The experiment proves that the feed ratio of the monomer is very consistent with the composition ratio of the copolymer, indicating that the initiator has a high initiation efficiency, and the polymerization reaction conditions of this mode are mild. Controllable, low energy consumption, no other organic solvents and emulsifiers, pure product, fully meet the requirements of green chemistry.
Owner:NINGBO UNIV

Polyhydroxyl tri-hydrazide initiator and preparation method thereof

The invention provides a polyhydroxyl tri-hydrazide initiator and a preparation and application method thereof. The initiator is an amphiphilic compound containing three hydrazide groups. The compoundcan be positioned in an oil-water interface. The hydrazide of the hydrophilic part can carry out redox reactions with potassium persulfate at a room temperature. The free radicals can be generated repeatedly for multiple times. A multi-phase serial polymerization mode can be flexibly controlled. In an oil-water interface, polymerization between styrene and vinyl acetate and polymerization betweenstyrene and N-vinyl pyrrolidone are triggered in sequence to obtain a segmented copolymer. The results of tests show that the feed ratio and the constituent ratio of the copolymer are almost identical, this means that the triggering efficiency of the initiator is high, moreover, the conditions of the polymerization reactions of this mode are controllable, the energy consumption is low, no other organic solvent or emulsifier is needed, the product is pure, and the preparation method meets the requirements of green chemistry.
Owner:NINGBO UNIV

Polyhydroxy lauryl hydrazine initiator, and application method thereof

The invention discloses a polyhydroxy lauryl hydrazine initiator, and an application method thereof. According to a preparation method method, an amphiphilic compound containing polyhydroxy and laurylhydrazine is synthesized, and is capable of realizing positioning at water / oil double-phase interface, at the same time, oxidation reduction reaction of hydrazine with potassium persulphate can be realized at normal temperature, a plurality of times of repeated generation of free radicals can be realized, so that flexible control of multi-phase series connection polymerization is realized, on thewater / oil interface, styrene and methyl acrylate, and styrene and acrylamide polymerization is induced in sequence successively on the water / oil interface, and corresponding segmented copolymers areobtained. It is confirmed by experiments that monomer feeding ratio and the composition of the copolymer are extremely consistent, it is shown that the inhibition efficiency of the inhibitor is relatively high; the polymerization conditions are mild and controllable; energy consumption is low; no other organic solvent or emulsifier is adopted; an obtained product is pure; and green chemistry requirements are satisfied.
Owner:NINGBO UNIV

A kind of polymerization method of naphthalimide fluorescent dye

The invention relates to a method for polymerizing a naphthalimide fluorescent dye. Synthesize a kind of amphiphilic compound containing 4-amino-1,8-naphthalimide fluorescent group and tertiary amine structure, can be used as the initiator of free radical polymerization, and its tertiary amine can react with potassium persulfate at normal temperature Oxidation-reduction reactions occur, and active free radicals are generated many times, which can initiate the polymerization of oil-soluble monomer styrene and water-soluble monomer acrylamide on the water / oil interface, so as to realize the polymer of naphthalimide fluorescent dye For the purpose of chemicalization, this mode can make functionalization and polymerization do not interfere with each other, has a large degree of freedom of operation, a variety of products, mild polymerization conditions, no organic solvents and emulsifiers, and meets the requirements of green chemistry.
Owner:NINGBO UNIV

A green preparation method of hydrophilized polyvinylidene fluoride membrane material

The invention relates to a method for preparing vinylidene fluoride / N, N-dimethylacrylamide copolymers in a green manner. The vinylidene fluoride / N, N-dimethylacrylamide copolymers are used as separation membrane materials. The method has the advantages that the method is a copolymer synthesis technology based on water / oil two-phase interfacial free radical polymerization, oxidation-reduction reaction is carried out by special Gemini surface active initiators and potassium persulfate at the normal temperature, free radicals are repeatedly generated on interfaces, independent polymerization reaction between vinylidene fluoride and N, N-dimethylacrylamide is initiated, two types of chain segments are connected with each other by initiator molecules in series to form the segmented copolymers, the feed ratios of monomers are extremely consistent with component ratios of the copolymers when pH (potential of hydrogen) values of water-phase media are within the ranges of 4.0-4.5 as proved by experiments, the content of N, N-dimethylacrylamide chain segments in the copolymers is adjustable in the ranges of 5-25 wt.%, polymerization reaction conditions in the modes are mild and controllable, the method is low in energy consumption, other organic solvents or emulsifiers can be omitted, products are pure, and requirements on green chemistry can be completely met.
Owner:NINGBO UNIV

Polymerization method of phthalocyanine

The invention relates to a polymerization method of phthalocyanine. An amphipathic compound containing cobalt phthalocyanine (or iron) functional groups and a tertiary amine structure is synthesized and can be used as an initiator for polymerization of free radicals, tertiary amine of the amphipathic compound and potassium peroxodisulfate are subjected to a redox reaction under normal temperature,active free radicals are generated repeatedly, both polymerization of oil-soluble monomers methyl methacrylate and polymerization of water-soluble monomers N-dimethylacrylamide can be triggered on awater / oil interface, thus, the purpose of polymerization of the phthalocyanine is achieved, by the adoption of the mode, functionalization and the polymerization reaction do not interfere with each other, the operation freedom degree is large, the number of the varieties of products is large, polymerization reaction conditions are mild, no organic solvent or emulsifier is used, and the requirements of green chemistry are met.
Owner:NINGBO UNIV

Gemini type hydrazide anion initiator and preparation and use methods thereof

The invention relates to a Gemini type hydrazide anion initiator and preparation and use methods thereof. An amphiphilic compound containing a bissulfonate radical and a hydrazide group is synthesized, and has the characteristics of a surfactant, and the hydrophilic hydrazide can undergo redox reaction with potassium persulfate at normal temperature, and free radicals can be repeatedly generated.Multi-phase tandem polymerization is flexibly controlled, and polymerization of styrene and vinyl acetate and polymerization of styrene and acrylamide are initiated in sequence at a water / oil interface to obtain a multi-block copolymer. Experiments prove that the monomer feed ratio is consistent with the composition ratio of the copolymer, and it is indicated that the initiator has high initiationefficiency. The polymerization conditions of the mode are mild and controllable, energy consumption is low, no other organic solvents and emulsifiers are adopted, the product is pure, and the requirements of green chemistry are fully met.
Owner:NINGBO UNIV
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