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

doi:10.1007/s40242-013-3104-9

Abstract

Abstract:

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 hydro- xyl 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(M_w/M_n<1.5) can be well-controlled in the final comb polymer, including the average number and length of branches.

Key words: Long chain branching, Polyethylene, Anionic polymerization, Comb-like polymer

LIU Feng, WANG Lu, ZHANG Guang-chun, ZHENG Jun, TANG Tao. Synthesis of Well-defined Long Chain Branched Polyethylene via Anionic Polymerization Combined with Graft-onto Method[J]. Chemical Research in Chinese Universities, 2013, 29(3): 589-595.

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