环氧化物阳离子开环聚合机理

介绍了环氧化物阳离子开环聚合的机理,主要包括活性链端机理和活性单体机理等。活性链端机理认为聚合的活性中心位于聚合增长链的链端,聚合单体与活性链端接触发生聚合反应实现链增长;活性单体机理认为聚合的活性中心位于单体分子,在活性单体向聚合链端羟基增加的过程中实现链增长。两者相结合可较成功地解释环氧化物开环聚合的实验现象。

Cationic Ring-Opening Polymerization Mechanism of Epoxide

The cationic ring-opening polymerization mechanisms of epoxides which mainly include the active chain end(ACE) mechanism,activated monomer(AM) mechanism and so on are introduced.According to the ACE mechanism,the polymeric active center is located at the end of polymeric propagation chain,the chain propagation is achieved by contacting and reacting between the polymeric monomer and the active chain end.According to the AM mechanism,the polymeric active center is located in the monomer molecule,the chain propagation is carried out in the course of adding the activated monomers to the terminal hydroxyl of polymeric chain.The experimental phenomena for the ring-opening polymerization of the epoxides can be successfully explained by combining both of the said two mechanisms.