Using a 2{sup}3 full factorial plan to analyze the effect that the reaction temperature, Al/Zr ratio, and pre-contact time has on propylene polymerization employing a metallocene catalyst

摘要

The influence of the reaction temperature (T), the Al/Zr ratio (Al/Zr) and the pre-contact time (t) on propylene polymerization using Et(Ind){sub}2ZrCl{sub}2 (rac(ethylenebis(indenil))zirconium dichloride) as the catalyst, and hexane as the solvent, was evaluated using a 2{sup}3 lull factorial plan. All the evaluated properties were mainly affected by the reaction temperature. The catalytic activity and the xylene solubles increased when T increased. Both the melting and the crystallization temperatures, the crystallinity, and the molecular weight decreased when T was raised.