SiO_2/氰酸酯纳米复合材料的力学性能和热性能  

Mechanical and thermal properties of SiO_2/cyanate ester nano-composites

作　　者：姚雪丽[1] 马晓燕[1] 陈芳[1] 屈小红[1] 

机构地区：[1]西北工业大学应用化学系,西安710072

出　　处：《复合材料学报》2006年第3期54-59,共6页Acta Materiae Compositae Sinica

基　　金：陕西省自然科学基金资助项目(N4CS0003)

摘　　要：采用高速均质剪切法制备了SiO2/氰酸酯(CE)纳米复合材料,并对该体系的静态力学性能、动态力学性能和热稳定性进行了研究。结果表明,纳米SiO2的加入提高了复合材料的冲击强度和弯曲强度。当SiO2含量为0.30 wt%时,复合材料的冲击强度达最大,增幅为88.9%;当SiO2含量为0.15 wt%时,材料的弯曲强度达最大,增幅为20.0%。复合材料的储能模量和高温损耗模量较纯CE树脂有明显提高,玻璃化转变温度比纯CE提高了31.2℃,热分解温度在SiO2含量为0.30 wt%时达最大,失重为10%时的热分解温度提高了25.7℃。SiO2/cyanate ester （CE） nano-composites were prepared by a high-speed homogeneous shearing method; the quasi-static and dynamic mechanical properties and the thermal stability of the composites were investigated. The results show that the impact and flexural strengths of the composites obviously increase at the low content of SiO2. The impact strength reaches a maximum at 0.30 wt% SiO2, which is 88.9% higher than that of the pure CE. And the flexural strength reaches a maximum at 0. 15 wt% SiO2, which is 20% higher than that of the pure CE. The storage modulus and high temperature loss modulus of the composites obviously increase compared with those of the pure CE, and the glass transition temperature is 31.2℃ higher than that of the pure CE. It is also found that the decomposition temperature of the composites reaches a maximum at 0.30 wt% SiO2 ; when the mass loss of composites is 10%, the degradation temperature increased by 25.7℃ compared with that of the pure CE.

关 键 词：纳米SIO2 氰酸酯 纳米复合材料 静态力学性能 动态力学性能 热稳定性 

分 类 号：TB332[一般工业技术—材料科学与工程]