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Synthesis of Supported Nickel Diimine Catalysts for Ethylene Slurry Polymerization

✍ Scribed by Yiyoung Choi; João B. P. Soares

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
695 KB
Volume
210
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Ethylene slurry polymerizations were performed using supported nickel diimine catalysts. The effects of catalyst structure and polymerization conditions on catalyst activity, polymer particle morphology, and polymer properties were investigated. Covalently attached supported nickel diimine catalysts activated with ethyl aluminum sesquichloride (EASC) have high activities and made polymers with spherical morphology. Compared with the equivalent homogeneous catalysts, the covalently attached supported catalysts produced polyethylene with higher melting temperatures, higher molecular weights, and broader molecular weight distributions. Borates used as internal activator during the synthesis of these supported catalysts successfully activated the nickel diimine complexes.

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