Abstract
Five new hetero-bimetallic metallocene complexes were synthesized by the reaction of RCpTiCl 3 and a Si-bridged zirconocene complex in refluxing toluene. They were all well characterized. These complexes activated with methylaluminoxane (MAO) are highly active catalysts for the polymerization of ethylene. The molecular weight ( M w=28,957–124,089) and the molecular weight distribution (MWD=2.04–3.01) of the polymer generated from the bimetallic catalytic system were higher than that obtained by Cp 2ZrCl 2.
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