摘要
聚合物材料以其优异的延展性在减震、密封等领域有着重要的应用。拉伸力学性能测试是表征聚合物材料延展性的重要指标。文章利用耗散粒子动力学模拟方法深入探究聚合物模型分子的链长和键能强度对聚合物体系拉伸性能的影响。模拟研究表明,聚合物材料的玻璃化转变温度在一定范围内受链长的影响;增加链长和聚合物链段的键能能够有效改善聚合物体系的拉伸性能;当链长较短时,键能对拉伸性能的影响有限。模拟研究进一步分析链长和键能影响聚合物材料的内部机理,为在实验中制备强而韧的聚合物材料提供参考。
Polymer materials,with their excellent ductility,play significant roles in fields such as vibration damping and sealing.The tensile mechanical property test is an important indicator for characterizing the ductility of polymer materials.The paper employs the dissipative particle dynamics simulation method to deeply investigate the effects of chain length and bond energy strength of polymer model molecules on the tensile properties of polymer systems.The simulation studies show that the glass transition temperature of polymer materials is influenced by chain length within a certain range.Increasing chain length and the bond energy of polymer segments can effectively improve the tensile properties of polymer systems.When the chain length is relatively short,the effect of bond energy on tensile properties is limited.The simulation research further analyzes the internal mechanisms by which chain length and bond energy affect polymer materials,providing references for the preparation of strong and tough polymer materials in experiments.
作者
赵骞
孔明
陈剑
缪春辉
张洁
孙思嘉
金莎莎
ZHAO Qian;KONG Ming;CHEN Jian;MIU Chunhui;ZHANG Jie;SUN Sijia;JIN Shasha(State Grid Anhui Electric Power Research Insitute,Hefei 230601,China)
出处
《塑料科技》
北大核心
2025年第7期35-39,共5页
Plastics Science and Technology
基金
国网安徽省电力有限公司科技项目(521205220003)。
关键词
聚合物材料
链长
分子模拟
耗散粒子动力学
拉伸性能
Polymer materials
Chain length
Molecular simulation
Dissipative particle dynamics
Tensile property
