Fu Xubing, Dong Xia, Yang Guisheng, Bai Shulin
School of Materials Science and Engineering, HEDPS/Center for Applied Physics and Technology, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, PR China.
Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Science, Beijing 100190, PR China.
Heliyon. 2022 Aug 13;8(8):e10206. doi: 10.1016/j.heliyon.2022.e10206. eCollection 2022 Aug.
Crystallization kinetics is the key factor in controlling the polymer crystallization process and affecting crystallinity and crystalline morphology, which determine the polymer's main properties. In this work, the non-isothermal crystallization kinetics of graphene/PA10T composites are investigated by the Jeziorny method and Mo method, and the crystallization activation energy is calculated by the Kissinger method. It is found that the addition of an appropriate amount of graphene to PA10T can significantly promote the crystallization of PA10T and accelerate its crystallization rate. The Jeziorny equation does not have a linear relationship across the whole crystallization range, while the Mo equation does a good linear fitting. In addition, the crystallization activation energy decreases when the graphene content is below 1 wt.%. TGA results indicate that the addition of graphene improves the thermal stability of PA10T.
结晶动力学是控制聚合物结晶过程以及影响结晶度和结晶形态的关键因素,而结晶度和结晶形态决定了聚合物的主要性能。在本工作中,采用Jeziorny法和Mo法研究了石墨烯/PA10T复合材料的非等温结晶动力学,并通过Kissinger法计算了结晶活化能。研究发现,向PA10T中添加适量的石墨烯可显著促进PA10T的结晶并加快其结晶速率。Jeziorny方程在整个结晶范围内不存在线性关系,而Mo方程具有良好的线性拟合。此外,当石墨烯含量低于1 wt.%时,结晶活化能降低。热重分析(TGA)结果表明,添加石墨烯提高了PA10T的热稳定性。