摘要
氧杂环类单体的阳离子开环聚合是通过单体中氧原子对活性种的亲核进攻实现,但若聚合体系内存在羟基则会存在另一种链增长机理,即活化单体(AM)增长机理。长期以来,学者们的研究重点主要集中在活性链(ACE)增长机理上,随着理论研究的深入以及测试技术的发展,AM机理才被提出。本文综述了AM增长机理在氧杂环单体阳离子开环聚合过程中存在的依据,以及近年来运用氧杂环单体在阳离子开环聚合过程中的AM增长机理,制备嵌段、星型和超支化聚合物的研究进展。
Propagation in the cationic ring-opening polymerization of oxygen-containing heterocyclic monomers involves nucleophilic attack of oxygen atoms from the monomers on the cationic growing species. If hydroxyl groups containing compounds were present in the system, propagation may proceed with another, mechanism which is known as activated monomer（AM） mechanism. For a long time, scholars＇ research focus mainly concentrated in the active chain end（ACE） mechanism, with the deepening of theoretical research and the development of testing technology, AM cationic polymerization of heterocyclic monomers was put forward. This review summarized the molecular mechanism of the existence of AM mechanism in the cationic ring-opening polymerization of oxygen-containing heterocyclic monomers. The paper also reviewed the chemical condition for initiating AM mechanism occurrence. Then, the AM mechanism was used as a tool to product block, star-like and hyperbranched polymers recently is summed.
出处
《高分子通报》
CAS
CSCD
北大核心
2014年第1期7-13,共7页
Polymer Bulletin
基金
工业和信息化部重点项目(NO.J142011A001)资助
关键词
氧杂环
阳离子开环聚合
活化单体
超支化聚合物
Oxygen heterocyclic
Cationic ring-opening polymerization
Activated monomer
Hyperbranched polymer
