with either a dimethylsilane bridge or a tetramethyldisilane bridge have been synthesised and fully characterised. These complexes were supported on a hydrocarbon insoluble polymethylaluminoxane (sMAO) and their slurry-phase ethylene polymerisation performance was investigated. The highest activity was achieved using SBMe2(CpMe,I*)Zr(CH2SiMe3)2 (8042 kgPE molZr–1 h–1 bar–1 at 60 °C) but a decrease
五个新组4的柄-bridged permethylindenyl配合物或者是二甲基
硅烷桥或四甲基乙
硅烷桥已被合成并充分表征。这些配合物负载在不溶于烃的聚甲基铝氧烷(sMAO)上,并研究了它们的淤浆相
乙烯聚合性能。最高的活性是通过使用小号乙中号Ë2个(Cp Me,I *)Zr(CH 2 SiMe 3)2(8042 kg PE mol Zr –1 h –1 bar –1在60°C下),但是随着桥长度的增加,活性降低。
DSC对聚合物的分析表明,生成的HDPE具有最小的分支和缺陷,而
SEM显示的聚合物具有商业上所需的均匀“爆米花”形态。
GPC分析表明,在80°C下,M w <570 kg mol –1的聚
乙烯的生产。此外,小号乙中号Ë2个将(Cp,I *)Zr(CH 2 SiMe 3)2固定在MAO改性的层状双氢氧化物(LDHMAO)上。淤浆相的聚合活性小号乙中号Ë2个该支持系统上的(Cp,I