Olefin polymerization with metallocene catalysts supported on polysiloxane derivatives

Three kinds of zirconocene catalysts, supported on polysiloxanes substituted with methylindenyl, methyl‐fluorenyl and two indenyl groups, respectively, were prepared and applied to propene and ethylene polymerizations using methylaluminoxane as cocatalyst. Both the activity and stereospecificity of...

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Bibliographic Details
Published in:Macromolecular rapid communications. 1995-12, Vol.16 (12), p.905-911
Main Authors: Soga, Kazuo, Arai, Takashi, Hoang, Ban The, Uozumi, Toshiya
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Three kinds of zirconocene catalysts, supported on polysiloxanes substituted with methylindenyl, methyl‐fluorenyl and two indenyl groups, respectively, were prepared and applied to propene and ethylene polymerizations using methylaluminoxane as cocatalyst. Both the activity and stereospecificity of these catalysts were found to lie between those of corresponding homogeneous and SiO2‐supported catalysts. Surprisingly, all the catalysts gave a mixture of atactic and isotactic poly(propylene), plausible reasons for which are briefly discussed.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.1995.030161205