Amalgamation of ziegler-natta and metallocene catalysts
1997
The MgCl 2 supported half titanocenes and Ti(4,4,4-trifluoro-1-phenyl-1,3-butanedionato) 2 Cl 2 catalysts were synthesized and applied to propene polymerization. Without supporting on MgCl 2 , those complexes displayed almost no activity even using methylaluminoxane (MAO) as cocatalyst. When supported on MgCl 2 , on the other hand, the resulting catalysts could be activated by ordinary alkylaluminums to yield polypropene in fairly high yields. The catalyst isospecificity was markedly improved by the addition of a suitable Lewis base.
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