Nonisothermal Crystallization Kinetics of In Situ Polyamide-Blended with Poly(phenylene oxide)

摘要

Blends of Polyamide-6/Poly(phenylene oxide)(PA-6/PPO) were prepared by in situ polymerization, in which the reactive compatibilitzer SP was added. Based on two kinds of kinetic equation of nonisothermal crystallization proposed by Wzawa and Liu, the influences of PPO, the cooling rte, and the compatibilizer on crystallization process of PA-6 were investigated. At a given cooling rate, the presence of PPO reduces the overall crystalliation rate of PA-6; for a fixed PPO level, the time of crystallization completed becomes shorter when the cooling rate is higher; the addition of SP impedes the development of crystal grwoth. Scanning electronic microscope (SEM) results for-tifed the above conclusion. According to the analysis result of experiment data, it shows that the Ozawa equation does not adequately describe the nonisothermal crystallization behavior of PA-6/PPO blends, whereas the Liu aproach can be well applied in this studied system.