Metallacyclic zirconocene complexes as catalysts for homogeneous and heterogeneous ethylene polymerization

A novel class of heterogeneous ethylene polymerization catalysts, derived from homogeneous metallacyclic zirconocene complexes is described. These complexes can be activated with methyl aluminoxane (MAO) and used for ethylene polymerization. The polymerization reaction begins homogeneously, but the...

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Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 2000-03, Vol.154 (1), p.65-72
Main Authors: Licht, Erik H, Alt, Helmut G
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Ethylene polymerization
Exact sciences and technology
Heterogenization
Metallacycles
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
Zirconium
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Summary:A novel class of heterogeneous ethylene polymerization catalysts, derived from homogeneous metallacyclic zirconocene complexes is described. These complexes can be activated with methyl aluminoxane (MAO) and used for ethylene polymerization. The polymerization reaction begins homogeneously, but the homogeneous metallacycles self-immobilize during the polymerization process. Subsequent olefin polymerization is therefore heterogeneously catalyzed. This method of heterogeneous olefin polymerization is compared with a homogeneous and an alternate heterogeneous polymerization technique.
ISSN:1381-1169
1873-314X
DOI:10.1016/S1381-1169(99)00378-7