Deformation and Elastic Recovery of Acrylate-Based Liquid Crystalline Elastomers
Deformation and Elastic Recovery of Acrylate-Based Liquid Crystalline Elastomers
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DOI：
10.1021/acs.macromol.9b01092
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发表时间：
2019-11-12
期刊：
影响因子：
5.5
通讯作者：
White, Timothy J.
中科院分区：
文献类型：
--
作者：
Brannum, Michelle T.;Auguste, Anesia D.;White, Timothy J.
液晶弹性体（LCE）以其刺激响应行为而闻名。这里介绍的工作有趣的是这些材料在加载时的独特的非线性变形。在这里，我们评估了通过链转移反应合成的丙烯酸酯基 LCE 的循环变形和弹性恢复。 LCE（用这种合成方法制备）的机械变形超过阈值应变值时不会弹性恢复，除非经过热处理。这些材料的热机械驱动在五个周期内表现出有限的滞后。对变形力学和弹性恢复的探索扩展了对这种材料成分的理解，并揭示了其在应用中的潜在用途。
Liquid crystalline elastomers (LCEs) are well known for their stimuli-responsive behavior. Of interest to the work presented here is the distinctive, nonlinear deformation of these materials to load. Here, we assess the cyclic deformation and elastic recovery of acrylate-based LCEs synthesized by chain-transfer reactions. Mechanical deformation of the LCEs (prepared with this synthetic approach) beyond a threshold strain value does not elastically recover, unless heat-treated. The thermomechanical actuation of these materials exhibits limited hysteresis over five cycles. Exploration of the deformation mechanics and elastic recovery extends the understanding of this material composition and informs its potential use in applications.