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以CE(氰酸酯)树脂为基体,以硅烷偶联剂(KH-560)表面处理过的纳米二氧化硅(nano-SiO2)为改性剂,采用高速均质剪切法制备CE/nano-SiO2复合材料;然后以该复合材料体系的黏度、凝胶化时间、弯曲强度和玻璃化转变温度(Tg)为考核指标,采用单因素试验法优选出满足树脂传递模塑(RTM)工艺用复合材料体系的最佳工艺条件。结果表明:当w(nano-SiO2)=3%、工作温度为(90±10)℃、工作时间≤10 h、固化温度为110～200℃和后处理工艺条件为220℃/4 h时,复合材料在低温时具有良好的稳定性,在高温时具有良好的反应性,完全满足RTM工艺的基本要求。
Using CE (cyanate ester) resin as matrix and nano-SiO2 surface-treated with silane coupling agent (KH-560) as modifier, high-speed homogeneous shear method was used to prepare CE / nano -SiO2 composites. Then the viscosity, gelation time, flexural strength and glass transition temperature (Tg) of the composites were used as indexes to evaluate the properties of the composites. The single-factor experiments were used to optimize the performance of the system for resin transfer molding (RTM) The best composite material system conditions. The results show that when the nano-SiO2 content is 3%, the working temperature is (90 ± 10) ℃, the working time is less than 10 h, the curing temperature is 110 ~ 200 ℃ and the post-processing condition is 220 ℃ / 4 h, The composite material has good stability at low temperature and good reactivity at high temperature, completely meeting the basic requirements of the RTM process.