环氧沥青固化动力学研究  

Curing kinetics of epoxy asphalt

作　　者：冯国平 宋家乐[2] 薛旋 徐宁 张栋梁 李炜光[1] FENG Guo-ping;SONG Jia-le;XUE Xuan;XU Ning;ZHANG Dong-liang;LI Wei-guang(Highway College of Chang′an University,Xi′an 710064,China;Materials Science and Engineering College of Chang′an University,Xi′an 710064,China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]长安大学材料科学与工程学院,陕西西安710064

出　　处：《热固性树脂》2019年第3期32-36,共5页Thermosetting Resin

基　　金：中央高校基本科研业务费专项资金资助(310821162009)

摘　　要：采用自制改性胺类固化剂、复配环氧树脂和基质沥青制备了环氧沥青,通过非等温示差扫描量热法研究了该环氧沥青体系的固化动力学。经线性拟合外推得到该体系最佳的固化温度为120℃。按照自催化动力学模型计算得到该体系的表观活化能Ea为42.57 kJ/mol,指前因子A为9 334.8/min,表观反应级数n为0.833。通过积分变换得到固化度与时间的对应关系,对120℃下此关系进行了模拟并采用红外光谱进行了验证,结果较为吻合。上述研究结果对环氧沥青混合料的现场施工具有指导意义。The epoxy asphalt was prepared with self-made modified amine curing agent,epoxy resin and matrix asphalt.The curing kinetics of this epoxy asphalt was studied by non-isothermal differential scanning calorimetry (DSC).The best curing temperature of the epoxy asphalt was 120 ℃ obtained by linear fitting extrapolation method.The apparent activation energy Ea, forward factor A and apparent reaction order n of the epoxy asphalt system was 42.57 kJ/mol,9 334.8/min and 0.833, respectively,calculated according to the self-catalytic kinetic model.The relationship between curing degree and curing time was obtained by integral transformation.The relationship was simulated at 120 ℃ and verified by infrared spectroscopy.The results were in good agreement.The above research results had guiding significance for the on-site construction of epoxy asphalt mixture.

关 键 词：环氧沥青 非等温DSC 红外光谱 固化动力学 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]