摘要
采用动态差示扫描量热法(DSC)研究了玻璃纤维/环氧树脂预浸料体系的固化过程,考察了玻璃纤维对环氧树脂固化动力学的影响;利用Kissinger法和Crane公式计算了体系的反应活化能、指前因子、反应级数等固化动力学参数。结果表明,玻璃纤维使环氧树脂体系的理论凝胶化温度、固化温度和后处理温度升高;同时,增大了固化反应活化能,而固化反应的反应级数基本不变。说明玻璃纤维使环氧树脂体系固化反应变难,但不改变其固化反应机理。
The curing kinetics of glass fiber/epoxy resin prepreg were investigated by dynamic differential scanning calorimetry （DSC）.The curing characteristic temperatures were obtained by analyzing the DSC profile and cure temperatures were calculated by liner fitting and extrapolating method.The curing degree curve was plotted according to reaction heat of t （△Ht） and total reaction heat （△H0）.The activation energy （E） and frequency factor （A） were calculated using Kissinger method while the reaction order （n） was calculated by Crane equation.The results showed that glass fiber led to increasing theoretical gelling temperature,curing temperature and postprocessing temperature.Also,glass fiber increased the activation energy.Moreover,glass fiber did not bring about the change of reaction order.Consequently,it was concluded that glass fiber had no obvious effect on the curing reaction mechanism while restrained the curing reaction.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2014年第4期13-17,共5页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金(NSFC)民航联合基金重点项目(U1233202)
民航局科技项目重大专项(MHRD201240)
