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Structure and properties of impact copolymer polypropylene. I. Chain structure

✍ Scribed by Cai Hongjun; Luo Xiaolie; Ma Dezhu; Wang Jianmin; Tan Hongsheng

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
191 KB
Volume
71
Category
Article
ISSN
0021-8995

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✦ Synopsis

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 copolymer, 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.

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