Application of asymmetric structure regulator containing nitrogen and oxygen heteroatoms

Abstract

The invention discloses the application of an asymmetric structure regulator containing nitrogen and oxygen heteroatoms; the regulator is an N- alkyl tetrahydro bran amine compound, and the structural formula thereof is as follows: wherein R1 is alkyl which comprises 1 to 4 carbons and R2 is the alkyl which comprises 1 to 4 carbons; the regulator can be applied to controlling the microstructures of butadiene homopolymer and copolymer, and the molar ratio R of the regulator to an initiator is 0.01 to 6; if N, N-tetrahydro furfuryl dimethyl amine serves as the regulator, when R is 0.65 AT 50DEG C, the content of the butadiene 1, 2 structure reaches 72.3 percent, thereby solving the problem of large used amount of the regulator in industry, having small impact on the reaction activity, facilitating coupling reaction and having high industrial application valve.

Description

technical field The invention relates to an asymmetric structure regulator containing nitrogen and oxygen heteroatoms and its application in controlling the microstructure of butadiene homopolymers and copolymers, belonging to the field of butadiene anion polymerization. Background technique A variety of homopolymers and copolymers of butadiene can be synthesized by anionic polymerization, and their microstructure has a great influence on the performance of the product. For example, in terms of homopolymers, the content of 1,2-structure of low cis-butylene, butylated hydroxy and butyl carboxyl gum, medium vinyl and high vinyl polybutadiene is ~10%, <40%, 35%, respectively. %~65% and >70%, the 1,2 structure determines that they have different uses. It can be seen that it is very important to effectively adjust and control the microstructure of the formed product in the research and production process of butadiene anionic polymerization. The polymer microstructure main...

AI Technical Summary

Problems solved by technology

The present invention aims at the problems that the adjustment function of the existing ether and amine structure regulators is sensitive to temperature and the dosage is relatively large, and develops a new type of N-alkyltetrahydrofurfurylamine microstructure regulator

Images