Journal of Molecular Catalysis A-Chemical, Vol.189, No.2, 187-194, 2002
Synthesis of hetero-bimetallic metallocene complexes and their catalytic activities for ethylene polymerization
Five new hetero-bimetallic metallocene complexes were synthesized by the reaction of RCpTiCl3 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 CP2ZrCl2. (C) 2002 Elsevier Science B.V. All rights reserved.