This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging η
5
-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
本发明涉及催化剂组合物、方法和聚合物,其中包括至少一种含有桥式η5-
环戊二烯基型
配体的第四族过渡
金属烯化合物,通常与至少一种协同催化剂和至少一种活化剂相结合。本发明所披露的组合物和方法提供了具有低
水平长链支化的
乙烯聚合物。