Abstract:
Ethylene polymerization by bis(cyclopentadienyl) zirconium dichloride (Cp2ZrCl2)-tris(pentafluorophenyl) borane (B(C6F5)3) catalyst with trimethylaluminum (TMA) has been investigated. The cationic-like active species is formed in the ternary systems of Cp2,ZrCl2, TMA, and B (C6GF5)3. The results show that the productivity andcatalytic activity of Cp2ZrCI2,/B(C6F5)and Cp2,ZrCl2,/TMA are negligible when compared with Cp2,ZrCl2,/B(C6F5)3;/TMA system. The concentration of TMA in the reaction system plays a key role in the catalyst activity. Increasing (Zr] leads to increase in the productivity and the catalyst activity. Furthermore, the order of catalyst injection into the reactor also affects the productivity and activity of the polymerization reaction.
