Synthesis of Well-defined Long Chain Branched Polyethylene via Anionic Polymerization Combined with Graft-onto Method  

作　　者：LIU Feng WANG Lu ZHANG Guang-chun ZHENG Jun TANG Tao 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China [2]University of Chinese Academy of Sciences, Beijing 100049, P. R. China

出　　处：《Chemical Research in Chinese Universities》2013年第3期589-595,共7页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.51073149, 51233005）.

摘　　要：Comb-like polyethylene（PE） was prepared via anionic polymerization combined with ＂graft-onto＂ process. The polybutadiene（PB） backbone underwent hydroxylation at 1,2-vinyl groups to obtain a controlled number of hydroxyl groups along the main chain. After the translation of hydroxyl groups to tosyl groups, a nucleophilic substitution by living anionic PB chains was achieved. The comb PE was finally obtained by the hydrogenation of the obtained unsaturated comb polymer. Since the living anionic polymerization was used to prepare the backbones and the branch chains, molecular weight to molecular weight distribution（Mw/Mn〈1.5） can be well-controlled in the final comb polymer, including the average number and length of branches.Comb-like polyethylene（PE） was prepared via anionic polymerization combined with ＂graft-onto＂ process. The polybutadiene（PB） backbone underwent hydroxylation at 1,2-vinyl groups to obtain a controlled number of hydroxyl groups along the main chain. After the translation of hydroxyl groups to tosyl groups, a nucleophilic substitution by living anionic PB chains was achieved. The comb PE was finally obtained by the hydrogenation of the obtained unsaturated comb polymer. Since the living anionic polymerization was used to prepare the backbones and the branch chains, molecular weight to molecular weight distribution（Mw/Mn〈1.5） can be well-controlled in the final comb polymer, including the average number and length of branches.

关 键 词：Long chain branching POLYETHYLENE Anionic polymerization Comb-like polymer 

分 类 号：TQ221.211[化学工程—有机化工] O631.5[理学—高分子化学]