Polypropylene resin compositions of high syndiotacticity and preparation process thereof.

摘要

Disclosed herein is a polypropylene resin composition of a high syndiotacticity comprising a substantial homopolymer of propylene, in which the ratio of the intensity of the peak attributable to the syndiotactic pentad bonds to the sum of the intensities of all the peaks attributable to the methyl groups in the spectrum of the methyl groups measured by <1><3>C-NMR is 0.7 or more, and a copolymer of ethylene and propylene, and a preparation process thereof.