稀土发光尼龙6固相缩聚前后非等温结晶动力学的研究

Research on Non-isothermal Crystazation Kinetics of Rare-earth Luminous Polyamide 6 Before and After Solid-state Polymerization

通过原位聚合制备出稀土发光尼龙6预聚体,再通过固相缩聚制备高分子量的稀土发光尼龙6。用Jez- iorny、Ozawa和Mo方法对尼龙6和稀土发光尼龙6固相缩聚前后进行非等温结晶动力学研究,发现固相缩聚前的结晶速率比固相缩聚后的结晶速率大。Ozawa方法在分析非等温结晶时偏差比较大,而Jeziorny方法虽然也有一定的偏差,但能很好地分析主结晶过程。Mo方法能很好地分析非等温结晶的过程。

The rare-earth luminous polyamide 6 prepolymer is prepared via in-situ melt polymerization, then the molecular weight of prepolymer is increased via solid-state polymerization（SSP）. The Jeziorny method, Ozawa method and Mo method are employed to describe the nonisotherrnal crystallization kinetics of pure polyamide 6 and the rare-earth luminous polyamide 6 composites with different molecular weights before and after the solid-state polymeri- zatiorL The results show that the Ozawa analysis seemed not to be suitable, while the Mo＇ s analysis is successfully used. Although the Jeziorny method has some deviations in analyzing the whole crystallization process, it could be applied to analyze the main crystallization process well.