| abstract |
A method for preparing high-rigidity and heat-resistant polypropylene resin. The Ziegler-Natta catalyst system is used to prepare polypropylene, and an organic nucleating agent is added to melt and mix to form a resin. Wherein the Ziegler-Natta catalyst comprises component (A) a magnesium chloride-supported Ti solid component, and contains a phthalate diester internal electron donor; component (B) trialkylaluminum; component (C) Including the first type of external electron donor and the second type of external electron donor, the molar ratio of the first type of external electron donor and the second type of external electron donor is 1-70:30-99, wherein the first type of external electron donor The electron body is selected from dicyclopentyldimethoxysilane, diisopropyldimethoxysilane; the second type of external electron donor is selected from 2-cyano-2,3-di-n-butyl dimethyl succinate . The heat distortion temperature of the prepared polypropylene exceeds 120°C. |