Aromatic Substituted Group 4 Metallocene Catalysts for the Polymerization of -Olefins
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- 作者：Patrick Foster ; James C. W. Chien ; and Marvin D. Rausch
- 刊名：Organometallics
- 出版年：1996
- 出版时间：November 12, 1996
- 年：1996
- 卷：15
- 期：23
- 页码：4951 - 4953
- 全文大小：139K
- 年卷期：v.15,no.23(November 12, 1996)
- ISSN：1520-6041
文摘
Six new group 4 metallocene complexes were synthesizedas precursors for the polymerization of 
-olefins. The phenyl-substituted precursors2b-4b when activated by methylaluminoxane (MAO) were highly active for the polymerization of ethylenebut exhibited noactivity for the polymerization of propylene.Bis(2-methylbenz[e]indenyl)zirconiumdichloride(5b) was activated with both MAO and triphenylcarbeniumtetrakis(pentafluorophenyl)borate (trityl)/triisobutylaluminum producing polypropylene with varyingmolecular weightdepending on polymerization temperature. The titanium precursor6b had lower activityfor ethylene as compared to the zirconium analog 5b andvirtually no activity for propylenewhen activated with either MAO or trityl.
-olefins. The phenyl-substituted precursors2b-4b when activated by methylaluminoxane (MAO) were highly active for the polymerization of ethylenebut exhibited noactivity for the polymerization of propylene.Bis(2-methylbenz[e]indenyl)zirconiumdichloride(5b) was activated with both MAO and triphenylcarbeniumtetrakis(pentafluorophenyl)borate (trityl)/triisobutylaluminum producing polypropylene with varyingmolecular weightdepending on polymerization temperature. The titanium precursor6b had lower activityfor ethylene as compared to the zirconium analog 5b andvirtually no activity for propylenewhen activated with either MAO or trityl.