Flexible Material Based on Poly(lactic acid) and Liquid Crystal with Multishape Memory Effects

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• 作者：Mao-qin Li ; Fei Song ; Li Chen ; Xiu-li Wang ; Yu-zhong Wang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：4
• 期：7
• 页码：3820-3829
• 全文大小：618K
• 年卷期：0
• ISSN：2168-0485

文摘

Construction of novel multishape memory materials from biobased polymers is of particular interest in recent years. Herein, a series of linear poly(lactic acid) (PLA)-based copolymers containing a smectic liquid crystal in the main-chain are designed and synthesized, of which the molecular structures are confirmed by NMR and GPC analyses. By introducing the liquid crystal, poly[4,4′-bis(6-hydroxyhexyloxy) biphenyl phenylsuccinate] (PBDPS), the brittleness of PLA is overcome, and flexible materials are successfully prepared. Relying on the crystallization of PLA as well as the π–π interaction that originated from PBDPS, the copolymers exhibit excellent thermoinduced triple- and quadruple-shape memory behaviors with high shape fixation and recovery ratios. Taking advantage of these features, the multishape memory polymers can bring more chances for versatile applications.