Ethylene polymerization with novel silicon bridged homo-dinuclear cyanoethyl cyclopentadienyl complexes of titanium and zirconium |
| |
| Authors: | Jun-quan Sun Cheng-feng Liang Yong-rong Yang Schumann H |
| |
| Institution: | 1.College of Material and Chemical Engineering,Zhejiang University,Hangzhou,China;2.Institute of Inorganic and Analytical Chemistry,Berlin University of Technology,Berlin,Germany |
| |
| Abstract: | Novel homo-dinuclear silicon bridged cyanoethyl cyclopentadienyl complexes of titanium and zirconium (CH3)2Si((η5 ? C5H3CH2CH2CN)(C5H5)MCl2)2(M = Ti(1), Zr(2)) were synthesized and developed for the polymerization of ethylene. Compared with their corresponding mononuclear complexes (η5 ? C5H4CH2CH2CN)(C5H5)MCl2(M = Ti(3), Zr(4)), the dinuclear complexes had higher catalytic activity. And the polyethylene produced had a higher molecular weight than that obtained with mononuclear catalysts. Effects of conditions on the ethylene polymerization catalyzed by (2)/MAO (methylaluminoxane) were studied in detail. The catalyst showed a very high activity (> 106 g PE/mol Zr·h) under low catalyst concentration and high molar ratio of Al/Zr. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
