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Role of Silica Properties in the Polymerisation of Ethylene Using Supported Metallocene Catalysts

✍ Scribed by Virginie F. Tisse; Floran Prades; Remi Briquel; Christophe Boisson; Timothy F. L. McKenna

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
857 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The role of certain morphological properties of different silica used as supports for metallocene catalysts was investigated in order to quantify their eventual influence on the kinetics of ethylene polymerisation in heptane slurry, as well as on the polymer properties. It was shown that there is no clear link between porosity and observed activity with some highly porous silica producing relatively inactive supported catalysts. It was further shown that within a batch of silica, the particle size had a significant impact on observed kinetics. While it appears that there is possibly some diffusion resistance encountered in the larger particles, it was also shown that prolonged contact between the support and the alkylating agent could increase reaction rates in the larger particles.
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