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A metallocene catalyst system for olefin polymerization using a heteropolyacid as the counter-anion

✍ Scribed by Kazo Soga; Toshiya Uozumi; Naoya Kishi

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 241 KB
Volume: 16
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.1995.030161103

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✦ Synopsis

Abstract

Polymerization of ethylene and propene were conducted with bis(cyclopentadienylzirconium dichloride) (Cp~2~ZrCl~2~) and ethylenebis(1‐indenyl)zirconium dichloride (Et(Ind)~2~ZrCl~2~) combined with trialkylaluminium compounds using heteropolyacids as the counter‐anions, giving linear polyethylene and isotactic polypropene, respectively. No polymer was obtained when using Cp~2~Zr(CH~3~)~2~ instead of Cp~2~ZrCl~2~. The mechanism of the formation of active species is briefly discussed on the basis of these results.

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