Lawton Melodie I, Tillman Kelly R, Mohammed Halimatu S, Kuang Wenbin, Shipp Devon A, Mather Patrick T
Syracuse Biomaterials Institute and Biomedical and Chemical Engineering Department, Syracuse University, Syracuse, New York 13244, United States.
Department of Chemistry and Biomolecular Science and Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699, United States.
ACS Macro Lett. 2016 Feb 16;5(2):203-207. doi: 10.1021/acsmacrolett.5b00854. Epub 2016 Jan 19.
Soft shape memory polymers typically embody a permanently memorized geometry that cannot be altered, and therefore a new sample must be fabricated each time a new structure is required. We present a shape memory elastomeric composite featuring thermoplastic fibers as a fixing phase and a polyanhydride-based elastomer as the permanent, elastic phase. Interestingly, dynamic covalent exchange reactions at elevated temperatures ( > 50 °C) among the network chains of the elastomer allow near-complete reconfiguration of the permanent shape in the solid state. Together, these features combine to create a shape memory elastomer capable of arbitrary programming of both temporary and permanent shapes.
柔软的形状记忆聚合物通常具有无法改变的永久记忆几何形状，因此每次需要新结构时都必须制造新样品。我们展示了一种形状记忆弹性体复合材料，其以热塑性纤维作为固定相，以聚酸酐基弹性体作为永久弹性相。有趣的是，弹性体网络链之间在高温（>50°C）下的动态共价交换反应允许固态下永久形状的近乎完全重新配置。这些特性共同作用，创造出一种能够对临时形状和永久形状进行任意编程的形状记忆弹性体。
