用IR、DSC及TEM等手段,表征了聚醚型聚氨酯改性双酚-A型环氧树脂(PUDGEBA)/聚苯乙烯(PSt)室温同步固化IPN的结构.研究结果表明,所形成的固化产物,在3427 cm-1处有强而宽的吸收,说明形成强的分子间氢键和较弱的分子内氢键.DSC谱图只出现单一的转变,说明体系内两个组分的共混相容性较好;由于两个网络的固化速度基本同步,所形成的聚合物呈现界面较为模糊的双连续层状微相分离结构,层带宽度约1.0～2.0 μm,层带中还有与之垂直重叠的亚片层结构,宽约0.1～0.2 μm.
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