Synthesis and Catalytic Application of Homo-bimetallic Metallocene Complexes as Ethylene Polymerization Catalysts

摘要

Three new homo-birnetallic metallocene complexes were prepared by RCpMCl3(M = Ti, Zr) and Si-bridged cornpounds,and were all well characterized structurally. These complexes with the methylaluminoxane (MAO) are highly active catats for the polymerization of ethylene. Compared to the polyethylene obtained by Cp2ZrCl2, the molecular weight (Mw =78784-238021) of the polyethylene was higher and the molecular weight distribution (MwD= 2.10-2.44) was broader.