Ontology type: schema:ScholarlyArticle
2000-07
AUTHORSI. N. Meshkova, T. M. Ushakova, T. A. Ladygina, N. Yu. Kovaleva, L. A. Novokshonova
ABSTRACTThe 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... »
PAGES461-468
http://scigraph.springernature.com/pub.10.1007/s002890070066
DOIhttp://dx.doi.org/10.1007/s002890070066
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