聚苯醚/环氧树脂体系的固化反应研究

Study on Curing Reaction of Poly (2,6-Dimethyl-1,4-Phenylene Ether)/Epoxy Systems

用动态差示扫描量热法研究了PPO/EP体系的固化反应,其反应热和最大放热峰的峰温均随着PPO含量的增加而减小。采用程序升温DSC法,用Kissinger方程研究了PPO/EP体系的动力学特征,并计算得到了一些重要的动力学参数如表观活化能、反应级数等。红外和DSC研究表明,PPO/EP体系在固化过程中由于体系凝胶、EP分子量逐步增加以及PPO的存在引起体系的粘度升高等原因,导致固化反应没有进行完全。

It studied the curing reactions of poly （2, 6-dimethyl-1, 4-phenylene ether） （PPO） / epoxy （EP） systems by means of dynamic differential scanning calorimeter. The curing reaction heat and the peak temperature of maximum heat generating peak of PPO/EP blends both decrease with the increase of the content of PPO. It also studied cure kinetic characteristics through programmed heating DSC method and Kissinger equation, and obtained some important kinetic parameters, such as the apparent activation energy and order of reaction etc. The results of FTIR spectra and DSC showed that the curing reaction of the system is incomplete because of the raising of the viscosity of the system caused by the gelling of system, the increase of the molecular weight of EP, and the existence of PPO.