PROPYLENE-BASED COPOLYMER, PREPARATION METHOD THEREFOR AND USE THEREOF, AND POLYPROPYLENE COMPOSITION CONTAINING SAME

The present invention belongs to the field of olefin polymerization, and relates to a propylene-based copolymer, a preparation method therefor and the use thereof, and a polypropylene composition. The propylene-based copolymer may contain 60 to 95 wt% of a structural unit derived from propylene and 5 to 40 wt% of a structural unit derived from a comonomer. In the propylene-based copolymer, the comonomer has dispersion degree D[PCP]/[C] between 50% and 70%, and the comonomer has dispersion degree D[PCP]/[C]＝[PCP]/[C]×100%. When the propylene-based copolymer of the present invention is blended with polypropylene, the copolymer has an excellent compatibility with polypropylene, and can promote the crystallization of polypropylene and improve the mechanical properties of the obtained polypropylene material. La présente invention concerne le domaine de la polymérisation d'oléfines, et concerne un copolymère à base de propylène, son procédé de préparation et son utilisation, et une composition de polypropylène. Le