Polypropylene produced by binary supported catalyst based on metallocene

摘要

The binary silica supported catalyst system comprising the Cp{sub}2ZrCl{sub}2 and SiMe{sub}2(Ind){sub}2ZrCl{sub}2 metallocene compounds was prepared with different immobilization methods and evaluated at different propylene polymerization conditions. The homogeneous isolated catalysts and also the homogeneous catalyst mixture were also employed for comparison. High activities were obtained with the supported systems and the molecular weight of the produced polypropylene was invariably higher than the homogeneous precursor.