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总览 评价 尹征南 * （ 上海大学 上海市应用数学和力学研究所； ） 摘要： 高分子材料是软固体的典型代表，其变形与温度和应变率密切相关。高分子大变形本构关系对聚合物材料的研制开发、工程设计及其合理有效应用具有根本性意义。在基于长链状大分子网络结
尹征南*
（
上海大学 上海市应用数学和力学研究所； ）
摘要：
高分子材料是软固体的典型代表，其变形与温度和应变率密切相关。高分子大变形本构关系对聚合物材料的研制开发、工程设计及其合理有效应用具有根本性意义。在基于长链状大分子网络结构的统计途径的高分子材料大变形本构关系中，材料细观动态参数是联系高分子材料宏观变形和微观机理的桥梁，国内外研究者对此已经有了一些研究结果。本文针对高分子合金材料，通过不同温度和应变率条件下的冲击压缩实验结果，讨论材料宏观参数（如屈服应力）和细观参数（如应变率敏感因子和活化能）的计算过程，并进一步讨论相关因素对它们的影响。
关键词：
高分子；粘弹性；动态；应变率敏感因子；活化能
YIN Zhengnan*
（
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, China； ）
Abstract：
Polymeric materials is the most important materials of soft matter, and its deformation behavior is colosely realted with temperature and strain rate. Rational constitutive models for finite strain behaviours of various polymeric materials is of substantial significance for product design and effective applications. In polymer constitutive model based on finite deformation and long-chain macromolecule net structure theory, material microscopic kinetics parameters bridge the macroscopic deformation behavior and microscopic mechanism. Some results has been presented in and outside of China. In this paper, impact compression tests were carried out for polymer alloy under different temperature and strain rate. Yield stess and some microscopic kinetics parameters, such as strain rate sensitivity index and activation energy, were calculted from these test results. Furthermore, the influence of temperature and component fraction on these paramteres was discussed in details.
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