Controllable synthesis method of highly stereoregular polymethyl methacrylate

A technology of polymethyl methacrylate and methyl methacrylate, which is applied in the field of polymer science, can solve the problems of difficult control of chain transfer and side reactions, high reactivity of growth groups, less research, etc., and achieves a synthetic route. Clear and feasible effects, improved tacticity, and simple operation

Active Publication Date: 2020-08-25
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • Controllable synthesis method of highly stereoregular polymethyl methacrylate
  • Controllable synthesis method of highly stereoregular polymethyl methacrylate
  • Controllable synthesis method of highly stereoregular polymethyl methacrylate

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] It is proposed to use amylose derivatives with regular helical structure as additives to induce methyl methacrylate to form highly stereoregular polymers through free radical polymerization, and to further explore the effect of amylose derivatives on polymethyl methacrylate. Effect of ester tacticity. In the present invention, firstly, amylose is used as matrix raw material, and 3,5-dimethylphenyl isocyanate is used as derivatization reagent, and the helical polymer amylose-tris(3,5-dimethylbenzene) is synthesized by traditional esterification method. base carbamate) (ADMPC). On this basis, the synthesized amylose derivative was added as an additive to the radical polymerization reaction of methyl methacrylate, and its regular helical structure was used to induce the radical polymerization behavior of methyl methacrylate, and the final preparation Polymethyl m...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/14C08F2/02C08F2/38C08B33/02
CPCC08B33/02C08F2/02C08F2/38C08F120/14
Inventor 沈军孙梦尘代枭闵译萱
Owner HARBIN ENG UNIV
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