Effect of Polymerization Temperature on Propylene Polymerization with C_s-symmetric Metallocene Catalyst

摘要

A novel highly active C_s-symmetric metallocene catalyst namely: meso-dimethylsilylbis (2,4,6-trimethyl-1-indenyl)zirconium dichloride is presented. The effect of polymerization temperature (0-70 ℃ ) on the catalyst performance for propylene polymerization has been investigated. This catalyst shows very high activity at 50 ℃ which is higher than the activity of the racemic analogue, and the resulted polypropylene is amorphous in nature with isotactic pentad content [mmmm] of 12 %.