Block copolymer synthesis of para-methoxystyrene and cyclohexene oxide and 1,2,5,6-diepoxycyclooctane by radical/cation transformation polymerization

用自由基 /正离子转化聚合法 ,由对甲氧基苯乙烯、环己烯氧化物、1,2 ,5 ,6 二环氧基环辛烷体系一步法合成了它们的嵌段共聚物 .其中 ,聚对甲氧基苯乙烯构成自由基聚合链段 ,而环己烯氧化物与 1,2 ,5 ,6 二环氧基环辛烷的共聚物构成正离子聚合链段 .实验结果初步表明 ,1,2 ,5 ,6 二环氧基环辛烷的加入可有效地消除由正离子聚合时链转移产生的均聚物Active center transformation polymerization from a radical to a cationic mechanism of paramethoxystyrene (MOS) was performed by using 2, 2'-azoisobutyronitrile (AIBN) as a radical initiator and diphenyliodoniuin hexafluorophosphate (Ph2I+PF6-) as an electron acceptor. Block copolymers of poly (MOS-b-CHO/DECO) were prepared by one step by adding monomer cyclohexene oxide(CHO) and bifunctional monomer 1,2,5, 6-diepoxycyclooctane (DECO) to the above system. Using bifunctional monomer DECO successfully eliminated homopolymers formed by chain transfer reaction during cationic polymerization. The polymers obtained by the system containing MOS, CHO, AIBN, Ph2I+PF6- and DECO were characterized by H-1-NMR, extraction separation, and gel permeation chromatography (GPC), etc. Neither homopolymer of PCHO nor copolymers of CHO and DECO (poly(CHO-co-DECO)) were obtained by this system, suggesting the success and the efficiency of the method.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000178936800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)005555-55