bifunctional activators (Ph3C+)2[1,4-(C6F5)3BC6F4B(C6F5)3]2- (B2) and new bisborane 1,4-(C6F5)2BC6F4B(C6F5)2 (BN2) in ethylene + alpha-olefin copolymerization processes. Specifically examined are the comonomers 1-octene and poorly responsive isobutene. Large increases in comonomer enchainment efficiency into the polyethylene microstructure are observed versus the corresponding mononuclear catalyst [1-Me
本通讯描述了一种新的双核均质
金属
有机钛“受限几何催化剂”(CGC),(mu-CH2CH2-3,3')(eta5-
茚基)[1-Me2Si(tBuN)](TiMe2)}2[ EBICGC(Time2)2; Ti2],连同双功能活化剂 (Ph3C+)2[1,4-(
C6F5)3BC6F4B( )3]2- (B2) 和新的双
硼烷 1,4-( )2BC6F4B( )2 (BN2)
乙烯+α-烯烃共聚工艺。具体检查的是共聚单体 1-
辛烯和响应性差的
异丁烯。观察到与相应的单核催化剂 [1-Me2Si(3-乙基
茚基)(tBuN)]TiMe2 (Ti1) + Ph3C+B( )4- (B1) 或 B( ) 相比,聚
乙烯微观结构中的共聚单体链链效率大幅增加)3 (BN) 在相同的聚合条件下。在
乙烯+1-
辛烯共聚中,观察到 Ti2+B2 与 Ti1+B1 的 1-
辛烯掺入量是 Ti1+B1