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以氰酸酯树脂和中空玻璃微球为原料制备了复合泡沫。通过检测复合泡沫的剪切强度、平面拉伸强度以及压缩强度评价复合泡沫的机械性能。结果表明,复合泡沫的机械性能由玻璃微球的性质以及在复合泡沫中的含量决定。微球的密度越大,泡沫的机械性能越高,反之亦然。泡沫的力学性能与微球的含量几乎呈线性降低的关系。通过TG分析表明,复合泡沫的热性能主要由氰酸酯本身性质决定,起始分解温度为400℃,但在高温阶段,微球的存在加速了复合泡沫的分解速率。在180℃下经过30d热老化试验,复合泡沫的热失重不明显,但固化物的外观颜色加深。
Cyanate ester resin and hollow glass microspheres as raw materials prepared composite foam. The mechanical properties of the composite foam were evaluated by measuring the shear strength, flat tensile strength and compressive strength of the composite foam. The results show that the mechanical properties of the composite foam are determined by the properties of the glass microspheres and the content in the composite foam. The greater the density of the microspheres, the higher the mechanical properties of the foam, and vice versa. The mechanical properties of the foam and the content of the microspheres almost linearly decrease the relationship. TG analysis shows that the thermal properties of the composite foam are mainly determined by the nature of the cyanate ester and the initial decomposition temperature is 400 ℃. However, the microspheres accelerate the decomposition rate of the composite foam at high temperature. At 180 ℃ after 30d thermal aging test, the thermal weight loss of the composite foam is not obvious, but the appearance of the cured material deepens.