Green chemical preparation method of vinyl chloride/butyl acrylate copolymer

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a preparation method of a vinyl chloride / butyl acrylate copolymer, which is a thermoplastic elastomer, and its advanced preparation method meets the requirements of green chemistry. Background technique [0002] With the rapid development of modern science and technology and society, people have higher and higher requirements for the performance of polymer materials and are increasingly diversified and multi-functional. A single polymer is often difficult to meet people's needs, and the modification of polymer materials is becoming more and more important. Very important. Thermoplastic elastomer (TPE) is a new type of polymer elastomer material that shows the elasticity of rubber at room temperature, can be plasticized at high temperature, and has excellent processing performance. It has the characteristics of no vulcanization, easy processing, low cost, and re...

AI Technical Summary

Problems solved by technology

The existing PVC-TPE preparation methods all focus on physical methods, which can be divided into three types: blending with elastomers, introducing cross-linked structures, and plasticizing high relative molecular weight polyvinyl chloride. Vinyl chloride is a monomer with low polymerization activity. , generally rarely copolymerized with other olefin monomers, which greatly limits the development space of its chemical modification

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