摘要
目的拓展多通道原位红外光谱技术的应用,探究环氧树脂在固化行为中的分子结构变化以及不同固化深度下的动力学参数与恒温固化模型。方法采用多通道原位红外光谱的表征方法,对N,N,O-三缩水甘油基对氨基苯酚(环氧树脂AFG-90)与甲基纳迪克酸酐(MNA)的环氧涂层的固化过程进行30、40、50、60、70℃等5个温度下的原位红外光谱监测,基于特征官能团吸光度的变化,研究恒温固化模型。结果通过特征官能团吸光度与温度、时间的关系,计算得出AFG-90与MNA的环氧树脂固化体系在不同温度下的固化模型、达到不同固化度下的固化时间,求解得在不同固化深度下的活化能Ea主要在58~74 kJ/mol变化,且其均值为69.43 kJ/mol。结论获得了AFG-90与MNA的环氧树脂固化体系在固化过程中动力学参数和模型,同时试验结果表明,多通道原位红外光谱技术是研究高分子材料固化反应动力学的有效表征方法。
The work aims to expand the application of multi-channel in-situ infrared spectroscopy and investigate the molecular structure change of epoxy resin in curing behavior and the kinetic parameters and constant temperature curing model at different curing depths.Multi-channel in-situ infrared spectroscopy was used to characterize the curing process of the epoxy coating of N,N,O-glycidyl p-aminophenol(epoxy resin AFG-90)and methyl nadic anhydride(MNA)at five temperatures of 30,40,50,60 and 70℃.The isothermal curing model was studied based on the change of characteristic functional group absorbance.Through the relationship between the absorbance of the characteristic functional group and the temperature and time,the curing model of the epoxy resin curing system of AFG-90 and MNA at different temperatures and the curing time at different curing degrees were calculated.The activation energy Ea at different curing depths was mainly between 58-74 kJ/mol,and the average value was 69.43 kJ/mol.The kinetic parameters and models of the epoxy resin curing system of AFG-90 and MNA during the curing process are obtained.At the same time,the experimental results show that multi-channel in-situ infrared spectroscopy is an effective characterization method for studying the curing reaction kinetics of polymer materials.
作者
许春
梁书恩
蔺楠楠
郝晓飞
刘忠平
金波
孙杰
睢贺良
XU Chun;LIANG Shu-en;LIN Nan-nan;HAO Xiao-fei;LIU Zhong-ping;JIN Bo;SUN Jie;SUI He-liang(State Key Laboratory of Environment-friendly Energy Material,Southwest University of Science and Technology,Sichuan Mianyang 621010,China;Institute of Chemical Materials,China Academy of Engineering Physics,Sichuan Mianyang 621900,China)
出处
《装备环境工程》
CAS
2023年第7期32-40,共9页
Equipment Environmental Engineering
关键词
环氧树脂
涂层
固化机理
多通道原位红外光谱
化学结构
反应动力学
epoxy resin
coating
curing mechanism
multi-channel in situ infrared spectroscopy
chemical structure
curing reaction kinetics
作者简介
许春(1995-),男,硕士研究生;通讯作者:睢贺良(1987-),男,博士。
