This preview shows page 1. Sign up to view the full content.
Unformatted text preview: metal sites, with extremely high catalyst efficiency (g P/g cat x hour). Most commercial supported catalysts have the effcientcy > 10 6 g/g cat. h. The heterogeneous catalysts usually contain several type of active sites, dependent on the surface of the crystal structure. The multiple sites produce polymers with broad molecular weight distribution. Metallocene homogeneous (single-site) catalysts (methaluminoxane cacatalyst is essential to prepare high polymers) + MAO Dicyclopentadienyl Zirconocene Dow "In-site" Catalyst Kaminsky Catalyst ZrCl 2 (CH 3 ) 2 Si N TiCl 2 C(CH 3 ) 3 TiCl 2...
View Full Document
This note was uploaded on 10/16/2010 for the course MATSE 441 taught by Professor Chung,tze-chiang during the Fall '10 term at Pennsylvania State University, University Park.
- Fall '10