摘要
研究环氧树脂在80℃、RH 90%湿热老化环境中吸湿性能、力学性能和动态热力学性能随老化时间的变化。环氧树脂的吸湿行为符合Fick第二定律,平衡吸湿量为5.15%,水分在复合材料中的扩散系数约为1.65×10-6 mm2/s;树脂的力学性能下降趋势与吸湿率的增加趋势相对应;树脂的湿热老化机理主要是水分子的扩散及湿热对材料的塑化作用,没有明显的后固化和物理老化作用。
The moisture absorption characteristics and the changes of mechanical properties and dynamic thermomechanical properties of the epoxy resin during hydrothermal aging were studied.It was found that the epoxy resin obeys the second Fick′s law in terms of absorption behavior,having an equilibrium moisture content of 5.15% and a diffusivity of 1.65×10-6 mm2/s.The decrease in the properties of the epoxy resin is very relative to the increase in its moisture content.The aging mechanisms of resin include moisture diffusion and hydrothermal effect on resin plasticizing,there wasn′t obvious post curing and physical aging of resin.
出处
《兵器材料科学与工程》
CAS
CSCD
2010年第3期41-43,共3页
Ordnance Material Science and Engineering
关键词
环氧树脂
湿热老化
老化机理
epoxy resin
hydrothermal aging
aging mechanisms
