摘要
利用X衍射、动态力学分析(DMA)研究了不同的固化温度对环氧树脂/累托土纳米复合结构的性能及微结构的影响。实验表明,固化温度对纳米结构的形成有重要影响,在110℃以上固化时均能生成剥离型纳米复合材料;在140℃附近固化时,材料在玻璃态的储能模量最高,玻璃化转变温度也较高,此时能得到综合性能较好的复合材料。随着固化温度的提高,材料的Tg也随之提高,较高温度(高于140℃)固化时,材料的内外结构不均匀,导致力学性能变差。
The different curing temperature effect on the microstructures and properties of epoxy/rectofite nanocomposites were studied using X-ray diffraction (XRD) and dynamical mechanical analysis (DMA) . The results indicate that the formation of exfoliated structure is difficult when the curing temperature is low (T 〈 90℃). At the range from 110℃ to 200℃, the clay in matrix can all be exfoliated. The nanocomposite cured at 140℃ possess highest storage modulus and high glass transition temperature.