制备了不同摩尔比的双酚A二氰酸酯/酚醛环氧树脂共混物,测定了共混物和纯氰酸酯聚合物的吸湿曲线,用DMA和FTIR研究了湿热老化前后共混物结构与性能的变化.结果表明,氰酸酯基摩尔分数大于0.5的共混物具有明显比聚氰脲酸酯更低的平衡吸湿.老化后共混物的玻璃化转变温度保持率随氰酸酯含量的增加而降低.老化后聚氰脲酸酯的FTIR谱出现了降解产物的吸收峰,而共混物没有出现明显的结构变化.
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