Revealing triple-shape memory effect by polymer bilayers.
Revealing triple-shape memory effect by polymer bilayers.
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DOI：
10.1002/marc.200900409
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发表时间：
2009-11
影响因子：
4.6
通讯作者：
T. Xie;Xingcheng Xiao;Yang-Tse Cheng
中科院分区：
文献类型：
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作者：
T. Xie;Xingcheng Xiao;Yang-Tse Cheng
合成了两种玻璃化转变温度相差很大的环氧双形状记忆聚合物双层膜。这些双层环氧树脂样品表现出三重形状记忆效应（TSME）与形状fixities可通过改变两层之间的比例。双层环氧聚合物的三重形状的柔韧性可以通过两层之间的应力平衡来解释。在此基础上，我们认为在设计具有最佳TSME的三重形状记忆聚合物时应考虑以下三个分子设计准则：1）良好分离的热转变，2）强界面，3）层（或微相）之间模量和相对比率的适当平衡。
Bilayer polymers that consist of two epoxy dual-shape memory polymers of well-separated glass transition temperatures have been synthesized. These bilayer epoxy samples exhibit a triple-shape memory effect (TSME) with shape fixities tailorable by changing the ratio between the two layers. The triple-shape fixities of the bilayer epoxy polymers can be explained by the balance of stress between the two layers. Based on this work, it is believed that the following three molecular design criterions should be considered in designing triple-shape memory polymers with optimum TSME: 1) well-separated thermal transitions, 2) a strong interface, and 3) an appropriate balance of moduli and relative ratios between the layers (or microphases).