Structure and Properties of lmpact Copolymer Polypropylene.l.Chain Structure

摘要

In this work,impact copolymer polypropylene (ICPP) was fractionated into 4 fractions.ICPP and the 4 fractions were studied using Fourier transform infrared and 13~C nuclear magnetic resonance analysis.The results demonstrate that fraction A is ethylene-propylene rubber,fraction B is ethylene-propylene (EP) segmented copoly-mer,fraction C is ethylene-propylene block copolymer,and fraction D is polypropylene with a few ethylene monomers in the chain.The differences in properties between different impact copolymer polypropylenes should be due to their fractions'differences in composition and chain sequence structure.