Synthesis and characterization of long-chain-branched polyolefins with metallocene catalysts:: copolymerization of ethylene with poly(ethylene-co-propylene) macromonomer

被引：22

作者：

Kolodka, E

Wang, WJ

Zhu, SP

Hamielec, A

机构：

[1] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7, Canada

[2] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2003年 / 24卷 / 04期

关键词：

ethylene/propylene macromonomers; grafting; long chain branching; metallocene polymerization; polyethylene (PE);

D O I：

10.1002/marc.200390047

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(ethylene-co-propylene) macromonomer (EPM) was synthesized in a high-temperature continuous stirred tank reactor (CSTR) with [C5Me4(Si-(Me2NBu)-Bu-t)]TiMe2 (CGC-Ti) as the catalyst system. PE samples with EPM long chain branching (LCB) were produced by semi-batch copolymerization of ethylene and EPM with CGC-Ti. The LCB frequencies were up to 21.8 EPM side chains per PE backbone. The effects of temperature and ethylene pressure on the degree of EPM grafting and catalyst activity were examined.

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页码：311 / 315

页数：5

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