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Novel Route to Immobilize Metallocenes within Silica‐Based Supports: Investigation of a Nonhydrolytic Sol–Gel Process
Author(s) -
Dever Cédric,
Deffieux Alain,
Cramail Henri,
Mastroianni Sergio
Publication year - 2003
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200300004
Subject(s) - metallocene , polyethylene , polymerization , catalysis , ethylene , materials science , silica gel , polymer chemistry , post metallocene catalyst , chemical engineering , sol gel , organic chemistry , chemistry , polymer , composite material , nanotechnology , engineering
A novel approach to metallocene catalyst heterogenization is presented. Supported metallocenes are obtained by metallation of indenyl‐modified silica produced by a nonhydrolytic sol–gel process. The catalytic activities for ethylene polymerization are rather high for supported systems and may reach 190 grams of polyethylene per gram of catalyst per hour per bar. The influence of the preparation and composition of these supported metallocene systems on ethylene polymerization and polyethylene characteristics are reported.Possible structure of the indenyl‐modified silicas.