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采用熔融共混法制备了氰酸(酯BCE/)双马来酰亚胺预聚(体BMI)/纳米二氧化(硅nano-SiO2)复合材料,研究了nano-SiO2用量对复合材料耐热性能、静态力学性能和动态力学性能的影响,并利用扫描电镜分析了nano-SiO2在聚合物基体中的分散情况。结果表明:随着nano-SiO2用量的增加,BCE/BMI/nano-SiO2复合材料的冲击强度和弯曲强度均是先升后降,冲击强度、弯曲强度和储能模量均在nano-SiO2含量为2%时达到最大值;nano-SiO2的加入可以提高复合材料的耐热性,但随其用量的增加,nano-SiO2在基体中的分散性逐渐变差。
The BMI / Si nano-SiO2 composites were prepared by melt blending method. The effects of nano-SiO2 dosage on the heat resistance of the composites Properties, static mechanical properties and dynamic mechanical properties of the nano-SiO2 in the polymer matrix were analyzed by scanning electron microscopy. The results show that both the impact strength and the flexural strength of BCE / BMI / nano-SiO2 composites increase first and then decrease with the increase of the amount of nano-SiO2, and the impact strength, flexural strength and storage modulus are all in the range of nano-SiO2 content Is 2%. The nano-SiO2 can improve the heat resistance of the composites, but with the increase of the amount of nano-SiO2, the dispersion of nano-SiO2 in the matrix becomes worse.