环氧树脂电子束固化反应动力学研究

研究了以二芳基碘鎓盐为引发剂的电子束固化阳离子环氧树脂的固化反应动力学特征.研究表明:在反应初期,反应速率为质子酸数量所控制,反应速率随时间增加和环氧值的降低而加大;随反应的进行,反应速率的变化逐渐转化为环氧值所控制,反应速率达到一个极值点之后逐渐降低;当引发剂完全分解之后,反应速率只受环氧值所控制,呈一级反应动力学特征.

Study on Reaction Kinetics of Epoxy Cured by Electron Beam

The reaction kinetics of EB curing epoxy initiated by diaryiodinium was investigated.Before the resin was gelled,its reaction rate was controlled by the concentration of epoxide group and the concentration of the proton acid(HX) generated by the decomposition of initiator.In the initial period of the reaction,the concentration of the HX increased with the reaction time,the reaction rate was controlled by HX mainly.In the second period,the concentrations of HX and epoxide group co-controlled the reaction rate.In the third period,the initiator was decomposed completely,the rate was controlled by epoxide group,and it is first order reaction.