Controllable synthesis method of highly stereoregular polymethyl methacrylate

Abstract

The invention relates to a controllable synthesis method of highly stereoregular polymethyl methacrylate. The method comprises the following steps that: 1, with amylose adopted as a matrix raw material and 3, 5-dimethylphenyl isocyanate as a derivatization reagent, a spiral polymer amylose-tri (3, 5-dimethylphenyl carbamate) is synthesized by a traditional esterification method; and step 2, the synthesized amylose-tri (3, 5-dimethylphenyl carbamate) obtained in the step 1 is added into a methyl methacrylate free radical polymerization reaction as an additive, the regular spiral structure of the synthesized amylose-tri (3, 5-dimethylphenyl carbamate) is used for inducing the free radical polymerization behavior of methyl methacrylate, and finally the highly stereoregular polymethyl methacrylate is prepared. The method of the invention is clear and feasible in synthetic route, is mature in process and simple in operation, requires few control conditions, is easy to realize and can be used for large-scale batch production.

Description

technical field [0001] The invention belongs to the field of polymer science and technology, and relates to a controllable synthesis method of methyl methacrylate, in particular to a controllable synthesis method of highly stereoregular polymethyl methacrylate. Background technique [0002] The polymerization or copolymerization of most ethylenic monomers adopts free radical polymerization, but due to the uncontrollability of the reaction process, most of the obtained are random polymers, and the stereoregularity of polymers in actual production is closely related to the performance of materials. relevant. At present, there are many reports on the use of ionic polymerization or coordination polymerization to achieve stereocontrol, but there are few related studies on free radical polymerization and its stereocontrol behavior. In addition, due to the lack of conjugated substituents in vinyl esters, the high reactivity and low stability of the propagating group, chain transfe...

AI Technical Summary

Problems solved by technology

At present, there are many reports on the use of ionic polymerization or coordination polymerization to achieve stereocontrol, but there are few related studies on free radical polymerization and its stereocontrol behavior.

In addition, due to the lack of conjugated substituents in vinyl esters, the high reactivity and low stability of the propagating group, chain transfer and side reactions are difficult to control, adjusting the stereochemical configuration is a great challenge in synthetic polymer chemistry, and currently most Research focuses on how to improve the syndiotacticity, and there are few reports on improving the isotacticity of polymers

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