PA56/66共聚酰胺的非等温结晶动力学研究

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (3): 17-26.

PA56/66共聚酰胺的非等温结晶动力学研究

范松红¹, 高俊飞², 顾群², 张建强^*1

1.兰州理工大学石油化工学院, 甘肃兰州 730050;
2.中国科学院天津工业生物技术研究所, 天津 300308

收稿日期:2021-06-15 出版日期:2022-06-28 发布日期:2022-10-09
通讯作者: 张建强(1976-),男,甘肃清水人,博士,教授.Email:zhangjq@lut.edu.cn.
基金资助:
国家自然科学基金(21364004)

Non-isothermal crystallization kinetics of PA56/66 copolyamide

FAN Song-hong¹, GAO Jun-fei², GU Qun², ZHANG Jian-qiang¹

1. School of Petrochemical Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China

Received:2021-06-15 Online:2022-06-28 Published:2022-10-09

摘要/Abstract

摘要： 半结晶聚合物的结晶动力学对聚合物的结构以及性能具有大的影响,是聚合物加工过程中的关键参数.用差式扫描量热仪(DSC)研究了PA56、PA66及PA56/66共聚酰胺非等温结晶行为,采用Jeziorny法和MO法描述了PA56、PA66及PA56/66共聚酰胺的非等温结晶动力学,用 Kissinger计算了PA56、PA66及PA56/66共聚酰胺的非等温结晶活化能. 研究表明:Jeziorny法可以描述PA56、PA66及PA56/66共聚酰胺的非等温结晶过程的主要结晶部分,但不能描述PA56、PA66、PA56/66共聚酰胺非等温结晶的全部过程. MO法可以很好地描述PA56、PA66及PA56/66共聚酰胺的非等温结晶全部过程. Avrami指数n显示出PA56、PA66及PA56/66共聚酰胺具有更为复杂的成核及晶体成长机理. PA56在分子层面引入到PA66基体中,改变其晶体结构,加快其结晶速率.

关键词: 聚酰胺, 共聚, 非等温结晶, 动力学

Abstract: The crystallization kinetics of semi-crystalline polymer has a great influence on the structure and properties of polymer materials, and it is a important parameter in the process of polymer processing. The non-isothermal crystallization behavior of PA56,PA66 and PA56/66copolyamide was studied by differential scanning calorimetry (DSC). Jeziorny and Mo’s method were used to describe the non-isothermal crystallization kinetics of PA56, PA66 and PA56/66 copolyamide. The activation energy of non-isothermal crystallization of PA56, PA66 and PA56/66 copolyamide was calculated by Kissinger’s method. The results show that Jeziorny method can describe the main part of crystallization of PA56, PA66 and PA56/66 copolyamide, but it can not describe the whole process of them. Mo’s method can well describe the whole non-isothermal crystallization process of PA56, PA66 and PA56/66 copolyamide. Avrami index n shows that PA56, PA66 and PA56/66 copolyamide have more complex nucleation and crystal growth mechanism. PA56 is introduced into PA66 matrix at molecular level to change its crystal structure and accelerate its crystallization rate.

Key words: polyamide, copolymerization, non-isothermal crystallization, kinetics

中图分类号:

TB324

范松红, 高俊飞, 顾群, 张建强. PA56/66共聚酰胺的非等温结晶动力学研究[J]. 兰州理工大学学报, 2022, 48(3): 17-26.

FAN Song-hong, GAO Jun-fei, GU Qun, ZHANG Jian-qiang. Non-isothermal crystallization kinetics of PA56/66 copolyamide[J]. Journal of Lanzhou University of Technology, 2022, 48(3): 17-26.

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