A catalyst component for olefin polymerization comprising magnesium, titanium, halogen and electron donor, wherein the electron donor is selected from at least one of the diol diester compounds, when the diol diester comprised contains a certain amount of isomer with Fischer projection formula as shown in Formula (II), the activity and stereospecificity of the catalyst are greatly improved, especially in the production of polymers with high melt index, the isotactic index of the obtained polymers is improved substantially.
一种用于烯烃聚合的催化剂组分,包括
镁、
钛、卤素和电子给体,其中所述的电子给体选择至少一种二醇二酯化合物,当所包含的二醇二酯化合物具有如公式(II)所示的Fischer投影式的一定量异构体时,催化剂的活性和立体选择性得到极大提高,特别是在生产高熔指聚合物时,所得聚合物的同构指数得到显著提高。