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摘要
In order to explore the mechanism of composite curing reaction of low viscosity epoxy resin, boramine-anhydride The rheological properties and curing reaction process of low-viscosity epoxy resin with boramine-anhydride composite curing system were studied, and the influence of boramine-anhydride compound ratio on the rheological properties and curing reaction process of the composite curing system was analyzed. Based on Arrhenius equation, the curing time, gel time and activation energy of curing reaction of the composite curing system were determined by rheological parameters. The results show that the curing reaction is promoted with the increase of the anhydride ratio in the curing system, while the starting point of curing and the gel time point decrease, and the activation energy based on Arrhenius equation is reduced. The curing reaction process of boramine-anhydride composite curing system was analyzed by non-isothermal differential scanning calorimeter (DSC). The results indicate that relatively independent double exothermic peaks appear in the boramine-anhydride composite curing system. With the increase of anhydride ratio, the peak value of the low-temperature exothermic peak increases, the peak value of the high-temperature exothermic peak decreases, and the peak temperatures of double exothermic peaks move to the side of high temperature. According to the curing reaction mechanism of the two kinds of curing agents, two effects of mutual synergy and mutual competition between the curing agents of boramide and anhydride exist in boramine-anhydride composite curing system of epoxy resin.
- 出版日期2019
- 单位哈尔滨工程大学
