| abstract |
The invention relates to a catalyst component for olefin polymerization, a catalyst and application of the catalyst in olefin homopolymerization and polymerization. By using a composite internal electronic donor compound which contains an alpha-cyanosuccinate compound A and a single-functional group or double-functional group compound B which is selected from ester, ether, ketone and ketal except for the compound A as the catalyst of internal electronic donor synthesis, the catalyst has the characteristics of high catalytic activity, high hydrogen adjusting sensitivity, high isotactic index of polymerized products, wide molecular weight distribution and high weight-average molecular weight when being used for propylene polymerization. The favorable performance of the catalyst is beneficial to the preparation of polypropylene and the brand development of products. |