The present application relates to processes for polymerizing one or more olefins, comprising contacting under polymerization conditions one or more olefin monomers with a catalyst system comprising a transition metal compound and an activator having the following formula (2):
[RnAH]+ [Y]-, (2)
wherein [Y]- is a non-coordinating anion (NCA), A is nitrogen, phosphorus or oxygen, n is 3 if A is nitrogen or phosphorus, and n is 2 if A is oxygen, and the groups R are identical or different and are a C1 to C3 alkyl group, wherein at a given reaction temperature the weight average molecular weight (Mw) of the polymer formed increases or at least does not substantially decrease with increasing monomer conversion.
本申请涉及一种或多种烯烃的聚合工艺,包括在聚合条件下将一种或多种烯烃单体与催化剂体系接触,该催化剂体系由过渡
金属化合物和具有下式(2)的活化剂组成:
[RnAH]+ [Y]-, (2)
其中,[Y]- 是非配位阴离子(NCA),A 是氮、
磷或氧,如果 A 是氮或
磷,则 n 为 3,如果 A 是氧,则 n 为 2,基团 R 相同或不同,并且是 C1 至 C3 烷基,其中,在给定的反应温度下,形成的聚合物的重量平均分子量(Mw)随单体转化率的增加而增加或至少不大幅度降低。