用FTIR研究聚氨酯／不饱和聚酯IPN体系的反应动力学

利用傅里叶变换红外光谱研究聚氨酯不饱和聚酯互穿聚合物网络体系的反应动力学，求出了ＰＵ的反应速度常数ｋ。实验结果表明，ＰＵ在半－ＩＰＮ体系中的反应为二级反应，ＩＰＮ体系中ＰＵ组分与ＵＰ组分的反应相互影响：ＵＰ组分使ＰＵ组分的前期反应速度变慢，后期反应速度相对增加；ＰＵ组分使ＵＰ组分聚合的诱导期明显缩短。ＰＵ和ＵＰ的配比对反应转化率的影响是反应前期ＰＵ组分含量越高，ＰＵ组分反应转化率也越高；反应后期，

A Study of th Reaction Kinetics of PU/UP IPN System by Means of FTIR

The reaction kinetics of the polyurethane/unsaturated polyester (PU/UP)IPN system were studied by means of FTIR and the PU reaction rate constant k was obtained. The results showed th reaction of PU in semi -IPN system was of two-stage. The reactions of PU and UP in the system had effects on each other: UP made PU reactionrate decreased at early time and increased later;PU made the inductive time of UP polymerization obviously shorter;the more the PU content,the higher the inversion of the PU reaction at the early time ;and the more the PU content,the lower the inversion of the reaction at the late reaction.