Relationship between Thermal Oxidative Degradation Behavior and Primary Structure in Polypropylene-Impact Copolymer

Abstract

In this paper, thermal oxidative degradation was performed using four kinds of polypropylene-impact copolymers (ImPP), and the relationship between degradation behavior and primary structure were inves tigated by ¹³ C-NMR, GPC and titration of hydroperoxide using potentiometry. It was found that the rate of degradation mainly depended on the ethylene content and did on tacticity in the same content. The information would be useful for synthesis of ImPP having a higher stability.