Poly(4-vinylpyridine)-supported cationic bis(cyclopentadienyl)zirconocene catalyst: Development of a new simple method to prepare polymer-supported cationic zirconocene and its application to ethylene polymerization
作者:Kittichote Musikabhumma、Toshiya Uozumi、Tsuneji Sano、Kazuo Soga
DOI:10.1002/1521-3927(20000601)21:10<675::aid-marc675>3.0.co;2-i
日期:2000.6.1
Bis(cyclopentadienyl) zirconocene dimethyl (Cp 2 ZrMe 2 ) combined with triphenylcabenium tetrakis(pentafluorophenyl) borate ([Ph 3 C][B(C 6 F 5 ) 4 ]) was brought into contact with a suspension of 2% cross-linked poly(4-vinylpyridine) to give a new type of poilymer-supported cationic zirconocene catalyst. The resulting polymer-supported catalyst system combined with Al(i-Bu 3 ) showed markedly high
双(环戊二烯基)锆茂二甲基(Cp 2 ZrMe 2 )与四(五氟苯基)硼酸三苯基卡宾鎓([Ph 3 C][B(C 6 F 5 ) 4 ])与2%交联的悬浮液接触聚(4-乙烯基吡啶),得到一种新型的聚合物负载的阳离子锆茂催化剂。所得聚合物负载的催化剂体系与 Al(i-Bu 3 ) 结合,即使在 25-60°C 和 [A1]/[Zr] 摩尔比为 40- 的非极性溶剂(如己烷)中也显示出显着的高乙烯聚合活性。 200。通过分析己烷溶液的ZR含量,发现溶液中没有检测到Zr,即没有阳离子催化剂浸出到己烷介质中。发现催化活性随着聚合温度的升高而增加,并在 [A1]/[Zr] = 100 时表现出最高。分子量,