Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.
揭示了
金属茂化合物、包含至少一种
金属茂化合物的催化剂组合物、用于聚合烯烃的方法、制备催化剂组合物的方法、烯烃聚合物以及由烯烃聚合物制成的物品。在一个方面,揭示了一种含有至少一个
茚基
配体的
金属茂化合物和催化剂组合物,其中
茚基
配体含有至少一个卤代取代基,如
氟代取代基。这些
金属茂化合物和催化剂组合物可以产生具有意外低
水平的短支链的聚
乙烯。