Significant Proximity and Cocatalyst Effects in Binuclear Catalysis for Olefin Polymerization
作者:Hongbo Li、Charlotte L. Stern、Tobin J. Marks
DOI:10.1021/ma050959c
日期:2005.11.1
high-Mw branched polyethylene. In ethylene homopolymerization, ∼70× increases in molecular weight are achieved with(C1-Zr2) vs (μ-CH2CH2-3,3‘)(η5-indenyl)[1-Me2Si(tBuN)](ZrMe2)}2 (C2-Zr2) under identical polymerization conditions using(Ph3C+)2[1,4-(C6F5)3BC6F4B(C6F5)3]2- (B2) as the cocatalyst for both. With MAO as the cocatalyst, ∼600× increases in polyethylene molecular weight are achieved with
我们在这里描述的亚甲基桥连的双核“限制几何构型催化剂”(μ-CH执行2 -3,3' )(η 5 -茚基)[1-ME 2的Si(吨BuN)](ZrMe 2)} 2(C1-Zr 2)来生产高M w的支化聚乙烯。在乙烯均聚,约70×增加分子量与(C1-Zr的实现2)与(μ-CH 2 CH 2 -3,3' )(η 5 -茚基)[1-ME 2的Si(吨[PuN)](ZrMe 2)} 2(C2-Zr 2)在相同的聚合条件下使用(Ph 3 C +)2 [1,4-(C 6 F 5)3 BC 6 F 4 B(C 6 F 5)3 ] 2-(B 2)作为两者的助催化剂。与MAO作为助催化剂,〜600×增加聚乙烯的分子量与(μ-CH实现2 CH 2 -3,3' )(η 5 -茚基)[1-ME 2的Si(吨BUN)](的ZrCl 2)} 2(C2-Zr的2氯4)和(μ-CH 2 -3,3' )(η 5 -茚基)[1-ME