摘要
介绍了在用单活性中心催化剂进行乙烯、丙烯和1-烯烃配位聚合时,双分子间的可逆基团转移配位聚合新工艺,包括配位链转移聚合、链穿梭聚合和配位再生基团转移聚合。在此类聚合反应中,大分子链、化学基团(如甲基)、元素(如氯)在过渡金属活性中心与主族金属烷基化合物之间进行快速、可逆的转移。其中,主族金属烷基化合物作为链穿梭剂或增长大分子链的暂时寄存场所(代存物)。这些新工艺的引入不仅促进了聚烯烃新品种(特别是嵌段共聚物)的发展,而且使原先只能通过活性聚合才能制备出的聚烯烃材料,现在有可能在工业生产中实现。
The intent of this review is to provide a synopsis of advances related to the introduction and control of reversible bimolecular group-transfer polymerization processes for single-site coordination polymerization of ethene, propene, and 1-alkene. article. The above mentioned processes including Outlook on their future prospects is also within the coordinative chain-transfer polymerization, chainshuttling polymerization and degenerative group-transfer polymerization operated by fast reversible groups （polymeryl group or chemical group such as methyl group, or atom such as chlorine） transfer between active transition-metal centers and main-group-metal alkyl compounds. The latter can serve either as ＂chain shuttling＂ agents or as ＂ surrogate＂ chain-growth sites. Recent introduction of these processes further not only provide the basis for new paradigms for new polyolefins （especially block copolymers） discovery and development but also can provide the mechanisms by which precision polyolefins formerly prepared only under living conditions can now potentially be brought to commercial realization.
出处
《石油化工》
CAS
CSCD
北大核心
2009年第11期1141-1150,共10页
Petrochemical Technology
关键词
可逆基团转移聚合
配位聚合
链转移聚合
嵌段共聚物
聚烯烃
reversible group-transfer polymerization
coodination polymerization
chain-transfer polymerization
block copolymer
polyolefin
