Ethylene polymerization using silica-supported zirconocene dibromide/methylalumoxane catalysts

被引：20

作者：

Cheng, X ^{[1
]}

Lofthus, OW ^{[1
]}

Deck, PA ^{[1
]}

机构：

[1] Virginia Tech, Dept Chem, Blacksburg, VA 24061 USA

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2004年 / 212卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

metallocene; ethylene polymerization; immobilized catalyst; silica;

D O I：

10.1016/j.molcata.2003.11.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Functionalized metallocene precursors (BrMe2SiC5H4)CpZrBr2 (1), (BrMe2SiC5H4)(2)ZrBr2, (2) (Br2MeSiC5H4)(2)ZrBr2 (3), and [1,3-(BrMe2Si)(2)C5H3](2)ZrBr2 (4) were immobilized on partially dehydroxylated silica (PDS) and screened for ethylene polymerization in slurry reactions conducted in toluene using methylalumoxane (MAO) as the cocatalyst. The effects of metallocene precursor structure, catalyst immobilization method, and catalyst loading are presented in terms of catalytic activity, polymer molecular weight distribution, and stability of the catalysts toward leaching. (C) 2003 Elsevier B.V. All rights reserved.

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页码：121 / 126

页数：6

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