采用DMA法研究了热力学、动力学因素及组成比对聚氨酯/乙烯基酯树脂互穿聚合物网络(PU/VER IPN)材料阻尼性能的影响.研究发现:引入丙烯酸酯类单体为VER共聚单体,改善了常规以苯乙烯(St)为共聚单体的PU/VER(St)IPN材料的阻尼性能,含较长酯基的体系具有更优的阻尼性能;通过调整两网络的相对聚合速率及组成比,可使材料出现宽温域阻尼,合成的组成比为80/20、70/30及60/40的IPN材料,在至少近80℃的温域,阻尼因子(tanδ)>0.3.进一步通过TEM检测分析了IPN材料微观结构与阻尼性能的关系.
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