Ethylene polymerization with catalysts on the base of Zr-cenes and methylaluminoxanes synthesized on zeolite support View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2000-07

AUTHORS

I. N. Meshkova, T. M. Ushakova, T. A. Ladygina, N. Yu. Kovaleva, L. A. Novokshonova

ABSTRACT

The fixed aluminoxanes have been prepared on zeolite support Na-form of ZSM-5 (Si/Al=42) in reaction of partial hydrolysis of trimethylaluminium (TMA) with inside zeolite water. It was shown that aluminoxanes synthesized on zeolite surface form the heterogenized complexes with Cp2 ZrCl2 and Et[Ind]2 ZrCl2 which are active in ethylene polymerization without addition of other aluminiumorganic cocatalyst for a long time. The activation energy of ethylene polymerization in the presence of ZSM-5(H2O)/TMA - Et[Ind]2 ZrCl2 is equal to 32 kJ/mol. Molecular weight and melting point of polyethylene obtained with such zeolite supported Zr-cene catalysts are higher than those of polyethylene formed with appropriate homogeneous metallocene systems. More... »

PAGES

461-468

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s002890070066

DOI

http://dx.doi.org/10.1007/s002890070066

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1017087973


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