High-Molecular-Weight Atactic Polypropylene from Metallocene Catalysts. 1. Me2Si(9-Flu)2ZrX2 (X = Cl, Me)
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- 作者：Luigi Resconi ; Robert L. Jones ; Arnold L. Rheingold ; and Glenn P. A. Yap
- 刊名：Organometallics
- 出版年：1996
- 出版时间：February 6, 1996
- 年：1996
- 卷：15
- 期：3
- 页码：998 - 1005
- 全文大小：290K
- 年卷期：v.15,no.3(February 6, 1996)
- ISSN：1520-6041
文摘
The synthesis and characterization of theC2v symmetric(dimethylsilanediylbis(9-fluorenyl))zirconium dichloride (I) and(dimethylsilanediylbis(9-fluorenyl))zirconiumdimethyl(II) are reported. The crystal and molecular structureof II has been solved. The catalystsystem I/MAO and II/MAO (MAO = methylalumoxane)produce high-molecular-weightatactic polypropylene at relatively high polymerization temperatures(
r.gif">w = (1-4) × 105at50 
C and Al/Zr = 1200) in good yields, providing a practical entryto this novel, elastomericpropylene homopolymer.
r.gif">w = (1-4) × 105at50 C and Al/Zr = 1200) in good yields, providing a practical entryto this novel, elastomericpropylene homopolymer.