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Indexed by:期刊论文

Date of Publication:2011-04-26

Journal:MACROMOLECULES

Included Journals:Scopus、SCIE、EI

Volume:44

Issue:8

Page Number:2400-2403

ISSN No.:0024-9297

Abstract:The polymerization and copolymerization of 1,6-heptadiene (HPD) with ethylene and styrene catalyzed by the half-sandwich scandium alkyl complexes was reported. The cyclopolymerization of HPD took place rapidly at room temperature in the presence of 1/[Ph3C]-[B(C6F5) 4] to give a cyclopolymer containing both six-member ring methylene-1,3-cyclohexane (MCH) units and five-member ring ethylene-1,2- cyclopentane (ECP) units. The copolymerization of HPD with ethylene (1 atm) by the THF-containing complex at room temperature yielded the copolymer products showing a bimodal GPC profile, together with a significant amount of insoluble polymer materials, which might result from possible cross-linking reactions. The HPD content and styrene content in the terpolymers could be easily controlled simply by changing the HPD/styrene feed ratio under 1 atm of ethylene.