The polymerized metallocene catalyst 4 was prepared by the co- polymerization of ansa-zirconocene complex [(CH_2=CH)CH_3Si(C_5H_4)_2] ZrCl_2 (3) containing vinyl substituted silane bridge with styrene in the presence of radical initiator. Catalyst 4 was found to display high ethylene polymerization activity of 2.28 * 10~6 g PE/(mol·h) with a viscosity average molecular weight (M_η) value of 61.6 * 10~3 using methylalumoxane (MAO) as a co-catalyst. The ethylene polymerization has been investigated under different conditions.

Key words: METALLOCENES, CATALYST, ETHYLENE, POLYMERIZATION, IR, 1HNMR, CATALYTIC ACTIVITY