Abstract
Copolymerizations of olefins were carried out with the SiO2-, AI2O3- and MgCl2-supported Et[IndH4]2ZrCl2 catalysts combined with AIR3 as cocatalyst and the results were compared with those obtained previously in the presence of homogeneous Et[IndH4]2ZrCl2-MAO catalyst. Novel activation models of metallocene catalysts using organic Si compounds were also reported together with the results of ethylene polymerization. In addition, a new approach toward a development of highly isospecific heterogeneous metallocene catalysts was proposed in brief
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