作者:Keisuke Kimura、Kiyoka Takaishi、Tetsuya Matsukawa、Takashi Yoshimura、Hiroshi Yamazaki
DOI:10.1246/cl.1998.571
日期:1998.7
Nonbridged zirconocene dichlorides, (1,2-Me2-4-RC5H2)2ZrCl2(R = Me(3), Ph(4), p-FC6H4(5), 2-furyl(6), 2-thienyl(7), and Fc(8)), and meso- and rac-(1-Me-3-PhC5H3)2ZrCl2(9 and 10), in the presence of MAO show a high catalytic activity (8.1∼17.4 × 106 gPP/molZr·h) in the polymerization of propylene and produce almost an atactic elastomeric polymer of high molecular weight (Mw = 10.5∼23.2 × 104). In contrast, rac-(1-Me-3-t-BuC5H3)2ZrCl2(12) shows very low activity and produces a rather high isotactic polymer of low molecular weight.
非桥联二氯化锆、(1,2-Me2-4-RC5H2)2ZrCl2(R = Me(3)、Ph(4)、p-FC6H4(5)、2-呋喃基(6)、2-噻吩基(7)、和Fc(8)),以及内消旋和外消旋(1-Me-3-PhC5H3)2ZrCl2(9和10),在MAO存在下表现出高催化活性(8.1∼17.4 × 106 gPP/molZr·h )在丙烯的聚合反应中几乎产生高分子量的无规立构弹性体聚合物(Mw = 10.5∼23.2 × 104)。相比之下,rac-(1-Me-3-t-BuC5H3)2ZrCl2(12) 显示出非常低的活性并产生相当高的低分子量全同立构聚合物。