The thermo-mechanical behavior of shape-memory polymers (SMPs) serves for the engineering applications of SMPs. Therefore the understanding of thermo-mechanical behavior of SMPs is of great importance. This paper investigates the influence of loading rate and loading level on the thermo-mechanical behavior of a thermosetting shape-memory polymer through experimental study. A series of cyclic tension tests and shape recovery tests at different loading conditions are performed to study the strain level and strain rate effect. The results of tension tests show that the thermosetting shape-memory polymer will behave as rubber material at temperature lower than the glass transition temperature (Tg) and it can obtain a large shape fix ratio at cyclic loading condition. The shape recovery tests exhibit that loading rate and loading level have little effect on the beginning and ending of shape recovery process of the thermosetting shape-memory polymer. Compared with the material which is deformed at temperature higher than Tg, the material deformed at temperature lower than Tg behaves a bigger recovery speed.

形状记忆聚合物（SMP）的热机械行为可用于SMP的工程应用。因此，了解SMP的热机械行为非常重要。本文通过实验研究了加载速率和加载量对热固性形状记忆聚合物热力学行为的影响。在不同的载荷条件下进行了一系列的循环拉伸试验和形状恢复试验，以研究应变水平和应变率效应。拉伸测试结果表明，热固性形状记忆聚合物在低于玻璃化转变温度（Tg）的温度下将起橡胶材料的作用，并且在循环载荷条件下可以获得较大的形状固定率。形状恢复测试表明，加载速率和加载水平对热固性形状记忆聚合物的形状恢复过程的开始和结束影响很小。与在高于Tg的温度下变形的材料相比，在低于Tg的温度下变形的材料表现出更大的恢复速度。