A facile strategy to fabricate multishape memory polymers with controllable mechanical properties
A facile strategy to fabricate multishape memory polymers with controllable mechanical properties
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制造具有可控机械性能的多形状记忆聚合物的简便策略
DOI：
10.1002/marc.201600217
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发表时间：
2016
影响因子：
4.6
通讯作者：
Feng Jiachun
中科院分区：
文献类型：
--
作者：
Zhang Qinglong;Hua Wenqiang;Feng Jiachun
报道了一种仅用一种相变材料制备多种形状记忆聚合物的简便共混方法。在这项工作中，烯烃嵌段共聚物（OBC）和苯乙烯-B-（乙烯-共-丁烯）-B-苯乙烯（SEBS），这两者都是物理交联的，与结晶石蜡共混在一起。由于聚合物基质与石蜡之间的相互作用不同，石蜡在OBC和SEBS中的渗透表现出不同的熔融转变。有趣的是，当OBC含量足够时，仅分布在OBC中的石蜡也表现出两种明显的熔融转变。因此，最多可实现三次熔融转变的优异的四重形状记忆效应。此外，通过调节聚合物的种类和含量，可以方便地在很大程度上调节材料的力学性能和流变性能。与已报道的策略相比，这种简单可控的方法有助于使用廉价的原材料快速设计多SMP，这为多SMP从实验室到工厂铺平了道路。
A facile blending strategy to fabricate multishape memory polymers (SMPs) with only one sort of phase transition material has been reported. In this work, olefin block copolymer (OBC) and styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene (SEBS), which are both physically crosslinked, are blended with crystalline paraffin together. Due to the different interactions between polymer matrices and paraffin, the paraffin penetrated in OBC and SEBS exhibit separated melting transitions. It is quite interesting that merely paraffin distributed in OBC also shows two distinct melting transitions with enough OBC content in composites. Therefore, excellent quadruple shape memory effect can be achieved with a maximum of three melting transitions. Furthermore, through adjusting the polymer species and content, the mechanical and rheological properties can be conveniently tuned to a great extent. Compared with the reported strategies, this simple and controllable method sheds light on rapid design of multi‐SMPs using inexpensive raw materials, which greatly paves the way for multi‐SMPs from laboratory to factory.