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

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Summary

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.

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Authors and Affiliations

  1. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin St. 4, 117977 Moscow, Russia, , , , , , RU

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

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  1. I. N. Meshkova
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  2. T. M. Ushakova
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  3. T. A. Ladygina
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  4. N. Yu. Kovaleva
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  5. L. A. Novokshonova
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Received: 15 February 2000/Revised version: 10 May 2000/Accepted: 10 May 2000

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Meshkova, I., Ushakova, T., Ladygina, T. et al. Ethylene polymerization with catalysts on the base of Zr-cenes and methylaluminoxanes synthesized on zeolite support. Polymer Bulletin 44, 461–468 (2000). https://doi.org/10.1007/s002890070066

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  • DOI: https://doi.org/10.1007/s002890070066

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