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采用恒温DSC研究了聚氨酯/乙烯基酯树脂顺序互穿聚合物网络（ PU/VER-IPN）的反应动力学。结果表明，顺序PU/VER-IPN的形成分二步。聚氨酯（PU）首先形成网络一，然后乙烯基酯树脂（VER）形成网络二。两步反应都用n级反应模型来描述。确定了反应动力学参数：PU的反应级数为n1=1.29，lgk1=3.27 1/min，Ea1=25.9kJ/mol；VER的反应级数为n2=0.961，lgk2=4.44 1/min，Ea2=40.2 kJ/mol。根据动力学参数得出了反应速度、和反应温度三者之间的关系曲线及PU/VER-IPN形成的工艺参数：反应温度60℃、反应时间2h;反应温度,100℃、反应时间2h。“,”The reaction kinetics of forming polyurethane/vinyl ester resin simultaneous interpenetrating polymer network was studied by isothermal DSC. The polymerization of PU/VER-IPN is composed of two reaction steps. The PU is polymerized firstly and its reaction order (n1) is 1.29, frequency factor (lgk1) and activation energy (Ea1) are 3.27 1/min and 25.9 kJ/mol, respectively. The VER is polymerized later and its reaction order (n2), frequency factor (lgk2) and activation energy (Ea2) are 0.961, 4.44 and 40.2kJ/mol, respectively.The processing parameters of PU/VER-IPN are reactive temperture60℃、100℃，reactive time 2h and 2h.