聚乙烯高分子冷结晶行为的分子动力学模拟  

Molecular Dynamics Simulation of Cold Crystallization Behavior of Polyethylene Polymers

作　　者：王怡涛 罗传富 周恒为 Wang Yitao;Luo Chuanfu;Zhou Hengwei(Xinjiang Laboratory of Phase Transition and Microstructures in Condensed Matter physics,College of Physical Science and Technology,Yili Normal University,Yining,Xinjiang 835000,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构实验室,新疆伊宁835000

出　　处：《伊犁师范大学学报（自然科学版）》2024年第2期35-42,共8页Journal of Yili Normal University：Natural Science Edition

摘　　要：采用分子动力学模拟,研究了两种在不同初始温度下淬冷得到的非晶高分子体系在后续相同的升温过程中的冷结晶行为,对冷结晶过程中高分子体系的结晶度、键取向序、茎秆长度和晶体形貌的变化进行了研究,发现在淬冷前初始温度更高的体系比温度更低的体系更早结晶的反常结晶现象,其结果与文献中实验观察一致.In this paper,molecular dynamics simulations are used to study the cold crystallization behavior of two amorphous polymer systems quenched at different initial temperatures during the same heating process.The changes of crystallinity,bond orien-tation,stem length and crystal morphology of the polymer system during the cold crystallization process are studied,and it is found that the system with a higher initial temperature crystallizes earlier than the system with a lower temperature before quenching,and the results are consistent with the experimental observations in the literature.

关 键 词：聚合物结晶 冷结晶 分子动力学模拟 

分 类 号：O469[理学—凝聚态物理]