Polymerization Behavior with Metallocene Catalyst Supported by Clay Mineral Activator

Abstract Acid treated clay (montmorillonite) was reacted with AlEt 3 (TEA) to give TEA-treated montmorillonite (TEA-Montmorillonite). Various amounts of 2,6-dimethylpyridine (26DMP) was added to TEA-Montmorillonite in order to control the acid strength of TEA-Montmorillonite, then the reaction mixture was reacted with triisobutylalummum ( TiBA ) (0.6 mmol) and 0.3mmol of rac-Me 2 Si(2-Me-4-Ph-l-lnd) 2 ZrCl 2 ( 1 ) to prepare the catalyst. The catalysts were characterized by using solid state UV-vis spectrum spectroscopy. Ethylene polymerizations and propylene-ethylene (1:1 molar ratio) copolymerizations were carried out in heptane at 75 °C-0.8 MPaG for 0.5 h after prepolymerization. The effect of acid strength and propylene prepolymerization on the olefin polymerization behaviors were studied in this catalyst system.