PET/iPBS复合材料的非等温结晶动力学  

Non⁃Isothermal Crystallization Kinetics of PET/iPBS Composite

作　　者：刘伟奇 陈绪煌 LIU Weiqi;CHEN Xuhuang(Hubei Provincial Key Laboratory of Green Materials for Light Industry,College of Materials and Chemical Engineering,Hubei University of Technology,Wuhan,Hubei 430068,China)

机构地区：[1]湖北工业大学,材料与化学工程学院,绿色轻工材料湖北省重点实验室,湖北武汉430068

出　　处：《塑料》2024年第4期8-14,共7页Plastics

摘　　要：采用差示扫描量热法研究了聚对苯二甲酸乙二醇酯(PET)及其复合材料的非等温结晶动力学。采用Jeziorny、Mo模型对其进行了描述。结果表明,Jeziorny法能较好地描述复合材料的非等温结晶过程,Mo法能得到最佳的线性关系。Mo法中的α值大致相同,这表明,在不同相对结晶度下形成的结晶结构相似。同时,Mo法的另一个参数F(T)随着相对结晶度的增大而增大,这表明,相对结晶度越大,复合材料结晶越困难。利用Friedman方程计算了所有复合材料非等温结晶过程的有效活化能,Dobreva和Gutzow方法计算了成核活性,结果表明,复合材料的活化能和成核活性均小于纯PET,进一步证明了上述结果。The non⁃isothermal crystallization kinetics of polyethylene terephthalate(PET)and its composite were studied using differential scanning calorimetry.The Jeziorny and Mo models were used to describe them.The results showed that the Jeziorny method could better describe the non⁃isothermal crystallization process of the composite,and the Mo method could obtain the best linear relationship.αvalues in the Mo method were approximately the same,indicating that the crystalline structures formed at different relative crystallinity were similar.Meanwhile,another parameter of the Mo method,F(T),increased with the increase of relative crystallinity,indicating that the larger the relative crystallinity,the more difficult the composite crystallize.The effective activation energy and the nucleation activity of non⁃isothermal crystallization process of all composite was calculated.The results showed that the activation energy and nucleation activity of composite was smaller than pure PET,which further confirmed the above results.

关 键 词：聚对苯二甲酸乙二醇酯 离聚物 非等温结晶动力学 结晶速率 结晶活化能 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]