A new strategy to prepare polymer composites with versatile shape memory properties
A new strategy to prepare polymer composites with versatile shape memory properties
复制标题
制备具有多功能形状记忆特性的聚合物复合材料的新策略
DOI：
10.1039/c2jm35619h
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发表时间：
2012-11
影响因子：
--
通讯作者：
Wu Peiyi
中科院分区：
文献类型：
--
作者：
Zhang Qinglong;Song Shijie;Feng Jiachun;Wu Peiyi
提出了一种新的制备多形状记忆聚合物的策略，即利用小分子的受限共结晶特性来构建可调开关。在此基础上制备了一种新型形状记忆聚合物，该聚合物由不同链长的石蜡分子和苯乙烯-b-(乙烯-丁烯)-b-苯乙烯(SEBS)组成。由于石蜡分子倾向于在广泛的链长上形成一系列连续的固溶体，被认为是共结晶，通过混合具有不同熔点的石蜡分子可以获得广泛的热转变，而对于我们的形状记忆复合材料来说，广泛的转变对于可调能力是必不可少的。用差示扫描量热法对SEBS-石蜡复合材料的热性能进行了表征，表明其具有良好的受限共结晶特性，并通过广角X射线衍射和连续自成核及退火热分馏分析进一步验证了这一特性。一系列形状记忆测试结果表明，该复合材料具有温度记忆、多形状记忆效应等多种形状记忆性能。与已报道的制备多形状记忆聚合物的方法相比，该方法不仅简化了从原料到加工的制备过程，为大规模制备铺平了道路，而且为调节力学性能和调节转变温度提供了一种可控的途径。
A new strategy to prepare multi-shape memory polymers, which utilizes the confined co-crystallization characteristics of small molecules to construct tunable switch, has been proposed. On the basis of this strategy, a novel shape memory polymer comprising paraffin molecules with different chain lengths and styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) was prepared. As paraffin molecules tend to form continuous series of solid solution over a wide range of chain lengths, deemed as co-crystallization, a broad thermal transition may be obtained through mixing paraffin molecules with distinct melting points, and for our shape memory composites, a broad transition is essential for tunable abilities. Thermal properties of the SEBS–paraffin composites have been characterized by differential scanning calorimetry, suggesting excellent confined co-crystallization characteristics, and such characteristics have been further verified by wide angle X-ray diffraction and successive self-nucleation and annealing thermal fractionation analysis. The results of a series of shape memory testing demonstrate that the composites possess versatile shape memory properties, such as temperature memory and multi-shape memory effect. Compared with the reported methods to prepare multi-shape memory polymers, this method not only simplifies the fabrication procedure from raw materials to processing, paving the way for large-scale fabrication, but also offers a controllable approach for adjusting the mechanical properties as well as tailoring the transition temperature.
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5.5
作者：
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通讯作者：
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