采用同步法制备了聚氨酯/环氧树脂互穿聚合物网络(IPN)半硬泡沫.通过压缩和拉伸试验研究了泡沫材料密度对力学性能的影响.研究表明,在所研究的密度范围内,泡沫的压缩模量和屈服强度均与密度成指数关系.泡沫的拉伸模量和断裂强度与密度也存在类似的关系.利用这些方程可以很好地预测泡沫力学性能随密度的变化关系.IPN泡沫兼有较好的韧性和较高的拉伸强度.相同形变下,相同密度IPN半硬泡沫拉伸过程的单位体积吸能大于压缩过程的单位体积吸能.
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