制备了聚氨酯/环氧树脂互穿网络半硬泡沫,通过热重分析(TGA)研究了其热分解,计算了各分解阶段的热分解反应动力学参数.结果表明,氮气中,互穿聚合物网络(IPN)泡沫根据环氧树脂含量不同其分解过程有2～3个失重阶段,随着环氧含量增加,第一阶段的失重率减小,第二阶段的失重率增大.IPN泡沫在第一、二两阶段总的热失重率低于纯聚氨酯泡沫及纯环氧树脂.环氧树脂含量为30%(质量分数,下同)时泡沫的热稳定性最好.预测IPN半硬泡沫在100℃氮气中失重5%时的热老化寿命可达2.4E7年,表明IPN泡沫具有很好的热稳定性.
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