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Synthesis of a TiCl4 Ziegler-Natta Catalyst Supported on Spherical MgCl2 · nEtOH for the Polymerization of Ethylene and Propylene

Authors

  • Lidiane A. Almeida,

    1. Instituto de Macromoleculas/IMA, Universidade Federal do Rio de Janeiro, UFRJ, P.O. Box 68525, 21941-590 Rio de Janeiro, Brazil
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  • Maria de Fátima V. Marques

    Corresponding author
    1. Instituto de Macromoleculas/IMA, Universidade Federal do Rio de Janeiro, UFRJ, P.O. Box 68525, 21941-590 Rio de Janeiro, Brazil
    • Instituto de Macromoleculas/IMA, Universidade Federal do Rio de Janeiro, UFRJ, P.O. Box 68525, 21941-590 Rio de Janeiro, Brazil
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Abstract

Experiments designed to prepare Ziegler-Natta catalysts with controlled particle morphology are reported. Different dealcoholation processes are used on the adduct MgCl2 · nEtOH to prepare the catalysts: either thermal treatment or chemical dealcoholation employing different substances such as titanium tetrachloride, triethylaluminium, dichlorodimethylsilane, and chlorotrimethylsilane. In addition, dichlorodimethylsilane dealcoholation is also performed after thermal treatment. SEM analysis of adducts, supports, and catalysts is carried out. The obtained catalysts are characterized through impregnated titanium content evaluation. The polyethylenes and poly(propylene)s obtained employing the so prepared catalysts show spherical morphology when examined by optical microscopy.

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