一种新型室温固化、耐高温环氧树脂体系及其性能

采用1-己基-3-甲基咪唑四氯化铁盐(C₆mim]FeCl₄)与混合胺复配室温(20 ℃)固化双酚A型环氧树脂E-51,并与其它脂肪胺类室温固化E-51体系在力学性能、热性能、耐老化性能方面的数据进行了比较,同时分析了C₆mim]FeCl₄不同添加量对固化体系性能的影响,结果显示:C₆mim]FeCl₄/混合胺复配室温固化E-51体系的室温拉伸强度可达90 MPa,高温(120 ℃)下也保持了良好的力学性能,热失重(5%)分解温度为310 ℃,200 ℃老化7 d后,拉伸强度为28 MPa,是一种可在高温下使用的新型环氧树脂室温固化体系。

Properties of a New Type Heat-Resistant System of Epoxy Resin Cured at Room Temperature

Bisphenol-A epoxy resin E-51 was cured by C₆mim]FeCl₄ and mixed amines at room temperature(20 ℃). Compared to other E-51 systems which were cured by aliphatic amine, E-51 systems cured by C₆mim]FeCl₄/mixed amine have better mechanical properties, thermal properties, and aging properties. The effect of the amount of C₆mim]FeCl₄ on the properties of the cured epoxy resin systems was also investigated. Tensile strength of the C₆mim]FeCl₄/mixed amine cured E-51 system reaches 90 MPa, and the system maintains its excellent mechanical properties at high temperature(120 ℃). The TGA result shows that the decomposition temperature is 310 ℃ when the mass loss of epoxy system reaches 5%. Even after 7 days aging at 200 ℃, the tensile strength of the C₆mim]FeCl₄/mixed amine cured epoxy resin system is 28 MPa. Therefore, the C₆mim]FeCl₄/mixed amine cured epoxy resin system is a new type of epoxy resin cured system which can be applied under high temperature.