Ethylene polymerization initiated by SiO2-supported neodymocene catalysts

Some SiO2‐supported neodymocene catalysts were prepared and polymerization of ethylene was conducted with them using alkylaluminiums, methylaluminoxane (MAO), BuLi and Bu MgEt (Bu: butyl, Et: ethyl) as cocatalysts. The lifetime of these catalysts was found to be very long. Catalytic activity as well...

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Bibliographic Details
Published in:Macromolecular rapid communications. 1995-04, Vol.16 (4), p.317-322
Main Authors: Jin, Jizhu, Uozumi, Toshiya, Soga, Kazuo
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:Some SiO2‐supported neodymocene catalysts were prepared and polymerization of ethylene was conducted with them using alkylaluminiums, methylaluminoxane (MAO), BuLi and Bu MgEt (Bu: butyl, Et: ethyl) as cocatalysts. The lifetime of these catalysts was found to be very long. Catalytic activity as well as molecular weight of the produced polymer are strongly dependent upon kind and amount of cocatalyst used. With increasing polymerization temperature, the activity increases monotonously up to 80°C. The use of BuMgEt and Al(i‐C4H9)3 as cocatalyst gives the highest activity and highest molecular weight, respectively.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.1995.030160414