Macromolecules

Significant proximity and cocatalyst effects in binuclear catalysis for olefin polymerization

H Li, CL Stern, TJ Marks

文献索引：Li, Hongbo; Stern, Charlotte L.; Marks, Tobin J. Macromolecules, 2005 , vol. 38, # 22 p. 9015 - 9027

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被引用次数: 71

摘要

We describe here the implementation of methylene-bridged binuclear “constrained geometry catalyst”(μ-CH2-3, 3'){(η5-indenyl)[1-Me2Si (t BuN)](ZrMe2)} 2 (C1-Zr2) to produce high-M w branched polyethylene. In ethylene homopolymerization,~ 70× increases in molecular weight are achieved with (C1-Zr2) vs (μ-CH2CH2-3, 3'){(η5-indenyl)[1-Me2Si (t BuN)](ZrMe2)} 2 (C2-Zr2) under identical polymerization conditions using (Ph3C+) 2 [1, 4- ...