In this work, graft copolymer poly (n-butyl acrylate)-g-polyacrylonitrile with poly (n-butyl acrylate) as backbones and polyacrylonitrile as side chains (PnBA-g-PAN) was synthesized by macromonomer method and emulsion polymerization. The macromonomer was synthesized by atom transfer radical polymerization and end-group modification. The chemical structures and thermal properties of macromonomer and graft copolymer were investigated by FTIR, GPC, NMR and TGA, etc. The mechanical properties of graft copolymer elastomer was also measured by uniaxial tensile test. Rheological properties at different temperature and mechanical property demonstrated that graft copolymer elastomer possessed elasticity until 180 oC because of cyclization of cyano groups. Ag nanowires@PnBA-g-PAN composite elastomer was developed, and the resulted material exhibited autonomic healing property on account of segments’ flexibility and dynamic interaction between Ag nanowires (AgNWs) and cyano groups. This is a general method for generation of elastomer with high temperature elasticity and fast self-healing. The composite elastomer has potential application in flexible electronic conductor.

中文翻译：

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具有高温弹性和可修复性的极性聚（丙烯酸正丁酯）-g-聚丙烯腈弹性体，作为柔性电子基板

在这项工作中，通过大分子单体法和乳液聚合合成了以聚丙烯酸正丁酯为骨架，聚丙烯腈为侧链的接枝共聚物聚丙烯酸正丁酯-g-聚丙烯腈（PnBA-g-PAN）。通过原子转移自由基聚合和端基修饰合成大分子单体。通过FTIR，GPC，NMR和TGA等方法研究了大分子单体和接枝共聚物的化学结构和热性能。还通过单轴拉伸试验测量了接枝共聚物弹性体的力学性能。在不同温度和机械性能下的流变性能表明，由于氰基的环化作用，接枝共聚物弹性体一直保持弹性直至180 oC。研发了Ag nanowires @ PnBA-g-PAN复合弹性体，由于片段的柔韧性以及Ag纳米线（AgNWs）和氰基之间的动态相互作用，因此所得材料具有自主愈合特性。这是产生具有高温弹性和快速自修复的弹性体的一般方法。复合弹性体在柔性电子导体中具有潜在的应用。