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用ＦＴＩＲ跟踪研究了由不同分子量聚氧化丙烯（ＰＰＯ）合成的氨酯丙烯酸酯树脂（ＵＡＲ）／环氧树脂（ｅｐｏｘｙ）同步互穿网络（ＳＩＮ）的生成动力学．结果表明，在聚合反应初期（转化率＜０４）环氧基和不饱和双键的转化率均和反应时间呈近似线性关系，聚合反应主要由单体的扩散控制；由不同分子量ＵＡＲ合成的ｅｐｏｘｙ／ＵＡＲＳＩＮ的生成动力学有较大差异，与ＳＩＮ形成过程中的形态发展有关．通过不同用量的ＡＩＢＮ，可以调节ＵＡＲ网络的形成速度，导致ＳＩＮ中两个网络的生成顺序发生改变．
The kinetics of urethane acrylate resin (UAR) / epoxy simultaneous interpenetrating network (SIN) synthesized from different molecular weight polyoxypropylene (PPO) was investigated by FTIR. The results showed that there was an approximate linear relationship between the conversion of epoxy groups and unsaturated double bonds in the initial stage of the polymerization (conversion rate <0.4) and the reaction time. The polymerization reaction was mainly controlled by the monomer diffusion. The formation kinetics of epoxy / UARSIN is quite different, which is related to the morphological development during the formation of SIN. Through the different amounts of AIBN, the formation rate of the UAR network can be adjusted, resulting in the change of the order of generation of the two networks in the SIN.