烯烃易位聚合制备遥爪聚合物及嵌段共聚物

Telechelic Polymers and Block Copolymers Prepared via Olefin-Metathesis Polymerization

遥爪聚合物因其聚合物链的两端带有反应性官能团,可用于制备嵌段、接枝、星形、超支化等具有特殊结构的聚合物,其制备方法主要包括传统自由基聚合与可控/"活性"自由基聚合、阴离子聚合、阳离子聚合、易位聚合和缩合聚合等。相比于其他的传统聚合方法,烯烃易位聚合是一种较为温和的、产物分子量及结构可控的聚合方法。本文主要概述在各种链转移剂的存在下,采用环烯烃的开环易位聚合(ring-opening metathesis polymerization,ROMP)和非环二烯易位(acyclic diene metathesis,ADMET)聚合制备带有各种官能团的遥爪聚合物以及与其他活性聚合方法(NMRP、ATRP、RAFT、ROP等)相结合制备嵌段共聚物的研究进展。

Because of the two functional groups in their polymer chain ends,telechelic polymers are usually used for the preparation of copolymers with special structures, such as block, graft, star-like, hyperbranched copolymers. Telechelic polymers are mainly prepared by traditional radical polymerization,controlled /＂living ＂radical polymerization, anionic polymerization, cationic polymerization, metathesis polymerization, and condensation polymerization,etc. In comparison with traditional polymerization methods,olefin metathesis polymerization can be conducted in milder conditions and the molecular weight and structure of products are more controllable. In this review,the preparation of telechelic polymers via ring-opening metathesis polymerization（ ROMP） and acyclic diene metathesis（ ADMET） polymerization in the presence of chain transfer agents are introduced. And the preparation of block copolymers via the combination with other living polymerization methods（ such as NM RP,ATRP,RAFT,ROP,etc.） will be also included.