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首页> 外文期刊>Journal of Applied Polymer Science >Effect of external electric field on morphologies and properties of the cured epoxy and epoxy/acrylate systems
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Effect of external electric field on morphologies and properties of the cured epoxy and epoxy/acrylate systems

机译：外部电场对固化的环氧树脂和环氧/丙烯酸酯体系的形态和性能的影响

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摘要

In this article, the influences of the external electric field exerted to the curing epoxy and epoxy/acrylate systems on their cured microstructures and macroscopic performances were investigated by means of morphological investigation and some characteristic analyses. Epoxy and epoxy/acrylate (an interpenetrating polymer network) systems were subjected to the action of the alternating electric field during the curing process. The changes in the nanolamellae microstructure in the cured epoxy and the nanoellipsoid microstructure in the cured epoxy/acrylate systems resulting from the electric field treatment were observed using atomic force microscopy. Dynamic mechanical analysis showed that the external electric field treatment made the low and high relaxation peaks shift to the lower and higher temperatures, respectively. Thermogravimetric analysis implied that the curing reactions of the epoxy systems with the aid of the external electric field resulted in some negative influences on their thermal stability. The dielectric measurements demonstrated that the electrical properties of the epoxy system for vacuum pressure impregnation insulation of the high-voltage electric machines could be much improved with the aid of the external electric field.
机译：本文通过形态学研究和一些特性分析，研究了外加电场对固化的环氧树脂和环氧/丙烯酸酯体系的固化后的微观结构和宏观性能的影响。环氧和环氧/丙烯酸酯（互穿聚合物网络）系统在固化过程中经受交变电场的作用。使用原子力显微镜观察了由电场处理导致的固化环氧树脂中纳米薄片微观结构的变化以及固化环氧树脂/丙烯酸酯体系中纳米椭圆体微观结构的变化。动态力学分析表明，外部电场处理使低弛豫峰和高弛豫峰分别移至较低温度和较高温度。热重分析表明，在外部电场的帮助下，环氧体系的固化反应对其热稳定性产生了一些负面影响。介电测量结果表明，借助于外部电场，可以大大改善用于高压电机的真空压力浸渍绝缘的环氧树脂体系的电性能。

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