Sequence-Rearranged Cocrystalline Polymer Network with Shape Reconfigurability and Tunable Switching Temperature,ACS Macro Letters

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Sequence-Rearranged Cocrystalline Polymer Network with Shape Reconfigurability and Tunable Switching Temperature
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-04-03 , DOI: 10.1021/acsmacrolett.0c00075
Wenhua Yuan ₁ , Jian Zhou ₁ , Kangkang Liu ₁ , Xing Li ₁ , Wenqing Xu ₁ , Huijie Song ₁ , Guorong Shan ₁ , Yongzhong Bao ₁ , Qian Zhao ₁ , Pengju Pan ₁

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Switching temperature (T_sw) is a key parameter governing the service condition of shape memory polymers (SMPs). However, tuning T_sw of SMPs often requires sophisticated synthesis or intricate processing. Herein, we report a simple yet effective strategy to prepare the SMPs with tunable T_sw and good reconfigurability by using the cocrystalline polyesters as the reversible phase. The cocrystallizable copolyesters with rearranged sequences were prepared by the transesterification of mixed polyester diols and then photo-cross-linked to achieve the SMP networks. Cocrystallization of copolymer blocks endows the SMP networks tunable melting point and relatively high crystallinity, affording the network good shape fixing and recovery ability at body temperature. Besides, the dynamic nature of transesterification, that enables the network to have good shape reconfigurability, allows for the easy processing of SMPs with complicated shapes. The reconfigurable SMPs capable of actuating at the body temperature show great potential for use as biomedical devices.

中文翻译：

具有形状可重构性和可调开关温度的序列重排共晶聚合物网络

转换温度 ( T _sw ) 是控制形状记忆聚合物 (SMP) 使用条件的关键参数。然而，调整SMP 的T _sw通常需要复杂的综合或复杂的处理。在这里，我们报告了一种简单而有效的策略来制备具有可调T _{sw的 SMP}通过使用共晶聚酯作为可逆相具有良好的可重构性。通过混合聚酯二醇的酯交换反应制备具有重排序列的可共结晶共聚酯，然后进行光交联以实现 SMP 网络。共聚物嵌段的共结晶赋予 SMP 网络可调的熔点和较高的结晶度，使网络在体温下具有良好的形状固定和恢复能力。此外，酯交换的动态特性使网络具有良好的形状可重构性，可以轻松处理具有复杂形状的 SMP。能够在体温下驱动的可重构 SMP 显示出用作生物医学设备的巨大潜力。

更新日期：2020-04-23

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