The influence of tertiary amine accelerators on the curing behaviors of epoxy/anhydride systems
2014
Yang, Tao | Zhang, Chongfeng | Zhang, Junying | Cheng, Jue
Accelerators have significant effects on the curing behaviors of epoxy/anhydride (diglycidyl ether of bisphenol-F/methylhexahydrophthalic anhydride, DGEBF/MeHHPA) systems. Non-isothermal DSC was used to investigate the influence of dimethyl benzylamine (BDMA, 0.2phr/0.5phr) and Tris-(dimethyl aminomethyl) phenol (DMP-30, 0.2phr/0.5phr) on the curing behaviors of DGEBF/MeHHPA systems, respectively. When the amount of accelerators was kept constant, the activation energy calculated by Kissinger method changed slightly in the presence of either BDMA or DMP-30. And, with increasing the accelerator content from 0.2phr to 0.5phr, the value of activation energy decreased from 115kJ/mol to 85kJ/mol. Furthermore, the calculation results of Málek method identified that all systems in this study fitted Sesták–Berggren (SB) model and the corresponding model parameters, m and n, were obtained. It was found that the contribution of autocatalytic reaction with low accelerator content (0.2phr) was far less than that with high accelerator content (0.5phr).
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