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以聚氨酯（ＰＵ）为组分Ⅰ、乙烯基酯树脂（ＶＥＲ）为组分Ⅱ，采用二步法制备了聚氨酯／乙烯基酯树脂互穿聚合物网络（ＰＵ／ＶＥＲ－ＩＰＮ），采用透射电镜（ＴＥＭ）和原子力显微镜观察了ＰＵ／ＶＥＲ－ＩＰＮ的微观形态，用调制ＤＳＣ（Ｍ－ＤＳＣＴＭ ）、动态力学分析方法（ＤＭＡ）研究了ＩＰＮ 的玻璃化转变行为及动态力学性能。结果表明，ＰＵ 网络与ＶＥＲ网络形成了多相微区结构，在界面处互穿和缠结，形成类似胞状的结构，ＰＵ 相为胞壁，ＶＥＲ为胞体。在ＰＵ 和ＶＥＲ之间，次级作用明显加强，出现氢键吸收峰，并且出现宽温度阻尼范围。当ＰＵ／ＶＥＲ＝ ４０／６０ 时，材料在宽温度范围的阻尼性能最好
Polyurethane / vinyl ester resin interpenetrating polymer network (PU / VER-IPN) was prepared by a two-step process using polyurethane (PU) as component I and vinyl ester resin (VER) as component II. The microstructure of PU / VER-IPN was observed by TEM and AFM. The glass transition behavior and dynamic mechanical properties of PU / VER-IPN were investigated by means of DSC and MMA. The results show that the PU network and the VER network form a multi-phase micro-structure, interpenetrating and entangled at the interface to form a cell-like structure, the PU phase is the cell wall and the VER is the cell body. Between the PU and the VER, the secondary effect is significantly enhanced, hydrogen bond absorption peaks appear, and a wide range of temperature damping occurs. When PU / VER = 40/60, the material has the best damping performance over a wide temperature range