一种三臂聚醚胺固化环氧树脂的反应动力学

The Kinetics Analysis of Triamine Terminated Polyether Curing Epoxy Resin

为了探究新型韧性固化剂的工艺使用方法,采用非等温差示扫描量热(DSC)法研究了三臂聚醚胺(TAPE)固化剂与4,4’—二氨基二苯甲烷环氧树脂(AG-80)和4—(二缩水甘油基氨基)苯基缩水甘油醚(AFG-90)的固化反应动力学,以Málek法和等转化率法对体系的动力学模型和固化反应机理进行了判定,并对两种体系的力学性能进行了探究。结果表明:两种环氧体系的固化起始放热温度50℃左右,具有良好的反应活性;体系的固化反应过程符合Sestak-Berggren动态[SB(m,n)]模型;两种体系的断裂伸长率大于3.74%,具有良好的反应活性和韧性。

In order to explore the process of using the new toughness curing agent,the curing kinetics of tetraglycidyl—4,4'—diaminodiphenyl methane(AG-80)/triglycidyl-p-aminophenol(AFG-90)and triamine terminated polyether curing agent(TAPE)were investigated by non-isothermal DSC method.Málek method and isoconversional method were conducted to study the kinetics model and curing reaction mechanism,and mechnical properties of two epoxy systems were also explored.The results show that the initial curing reaction temperature of two systems are nearly 50oC with good reactivity.The curing reaction process of the systems suit the Sestak-Berggren kinetic[SB(m,n)]model.The strain at break of two systems is higher than 3.74%,which shows the two systems have good reactivity and toughness.