形状记忆聚合物力学行为及其物理机制

发布时间：2018-01-14 20:27

本文关键词：形状记忆聚合物力学行为及其物理机制　出处：《固体力学学报》2017年01期 　论文类型：期刊论文

【摘要】：形状记忆聚合物是一类环境响应主动形变智能软材料,是智能材料与结构领域的新兴研究内容之一.宏观概括其物理和力学行为的研究热点,主要包括三个方面:材料与环境之间的信息交换(如热量、能量等),主动形变控制(如驱动方法、形变行为本构建模等),软材料及其结构力学(如相变/转变热力学、复合材料设计等).形状记忆聚合物的记忆效应源于分子链段本征结构的热运动,受外场激励影响,是分子链段结构(包括构型和构象)松弛行为的宏观表象,遵循Arrhenius定律.论文从物理和力学两方面讨论了形状记忆聚合物的分子链段热力学行为及其熵弹效应、分子结构松弛力学行为、环境效应记忆行为的物理和力学机制,系统地对形状记忆聚合物分子结构本征属性及其物理机理、记忆效应转变机制及其力学内涵、温度记忆效应、多场耦合效应响应行为等热点和难点问题进行了分析和讨论.最后,论文展望了形状记忆聚合物力学行为研究的未来发展方向.
[Abstract]:Shape memory polymer is a kind of intelligent soft material for the active deformation of environment response , which is one of the emerging research contents in the field of intelligent materials and structures . It mainly includes three aspects : information exchange between material and environment ( such as heat , energy , etc . ) , active deformation control ( such as drive method , deformation behavior constitutive model , etc . ) , soft material and its structural mechanics ( such as phase change / transformation thermodynamics , composite design , etc . ) . The memory effect of the shape memory polymer is derived from the thermal motion of the intrinsic structure of the molecular chain segment , and is influenced by the field excitation . It is a macroscopic representation of the relaxation behavior of the molecular chain segment structure ( including configuration and conformation ) . The paper analyzes the thermodynamic behavior of the molecular chain segment of the shape memory polymer and the physical and mechanical mechanism of the environment effect memory behavior from two aspects of physics and mechanics , systematically analyzes and discusses the intrinsic properties of the molecular structure of the shape memory polymer and the mechanical connotation , the temperature memory effect , the multi - field coupling effect response behavior and the like . Finally , the future development direction of the shape memory polymer mechanics behavior research is looked forward .

【作者单位】：哈尔滨工业大学特种环境复合材料技术国防科技重点实验室;
【基金】：国家自然科学基金项目(11422217) 全国优博作者专项(201328) 国家“万人计划”青年拔尖人才支持计划资助
【分类号】：TB381
【正文快照】： 0引言形状记忆聚合物是一类具有环境响应功能的新兴形状记忆材料,是智能材料与结构研究领域的国际前沿和热点.相比于传统的金属基和陶瓷基形状记忆材料,形状记忆聚合物主要有以下几个方面的优势:(1)大应变,形状记忆聚合物最高具有800%拉伸应变的回复能力[1];(2)生物相容性好,

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