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纳米填料对含长链取代基液晶环氧树脂固化动力学及热性能的影响

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Keywords: 纳米填料,固化动力学,液晶环氧树脂,液晶织构,热性能

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Abstract:

制备了几种不同纳米粒子(SiO2、TiO2、有机化黏土10A、有机化黏土30B)填充的液晶环氧树脂EP-6-DDM复合材料,并用差示热分析(DSC)、偏光显微镜(POM)、X射线衍射(XRD)和热失重分析(TGA)等方法研究了纳米填料/EP-6-DDM复合材料体系的固化反应过程及其相结构变化和热性能。结果表明,四种纳米填料对于EP-6-DDM体系均有催化作用,其中SiO2的催化能力最强,有机化黏土30B的催化能力最弱。当黏土的质量分数为1%时,形成了剥离型纳米复合材料,大于3%时则剥离型和插层型共存。纳米填料的加入并未改变EP-6-DDM的液晶相织构,但是会破坏向列相液晶纹影织构的形成和完整性。热分析结果表明,纳米填料的加入使体系的热稳定性略有降低。

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