Synthesis of silica-supported metallocene catalysts for olefin polymerization

被引：12
|
作者：
Bortolussi, F [1 ]
Broyer, JP [1 ]
Spitz, R [1 ]
Boisson, C [1 ]
机构：
[1] CNRS, CPE, Lab Chim & Procedes Polymerisat, F-69616 Villeurbanne, France
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2002年 / 203卷 / 17期
关键词：
heterogeneous catalysts; metallocene catalysts; polyolefins; silica support;
D O I：
10.1002/macp.200290032
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Four supported metallocene catalysts were synthesized directly on silica [Si(CpZrCp), Si(CpZrInd), Si(IndZrCp), and Si(IndZrInd)]. The first ligand was chemically tethered to silica (internal ligand) while the second was free from silica (external ligand). The polymerization of ethylene and the copolymerization of ethylene with hexene were investigated. The activity of the catalysts and the molecular weights of the polymers were found to depend on the position of the ligands. In all cases, high-molecular-weight polyethylene with moderate polydispersity was obtained. Moreover, the copolymerization of ethylene with hexene provided a homogeneous polymer.
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页码：2501 / 2507
页数：7
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