复合材料结构修复专用基体树脂固化反应  

CURING REACTION OF THE MATRIX RESIN FOR THE COMPOSITES USED IN STRUCTURAL REPAIR

作　　者：王宇光[1] 黎观生[2] 张庆茂[2] 孙云[1] 李黎[2] 江璐霞[1] 

机构地区：[1]四川大学高分子材料工程国家重点实验室,成都610065 [2]成都飞机设计研究所,成都610041

出　　处：《复合材料学报》2004年第6期53-57,共5页Acta Materiae Compositae Sinica

基　　金：自然科学基金资助(50173017)

摘　　要：　研究了复合材料结构修复专用基体树脂(MR),对其固化反应进行了原位红外表征,定量分析了环氧基团在不同固化温度下的转化率,并与相应温度下测得的MR体系的凝胶化时间及粘度随时间变化情况进行了对比。结果表明,当固化温度达到DSC曲线上的起始反应温度时,由原位红外法得到的转化率曲线与通过宏观测试方法得到的凝胶化时间及粘度 时间曲线吻合;而当固化反应温度低于DSC曲线上的起始反应温度时,转化率曲线与相应温度下的凝胶化时间及粘度 时间曲线发生不同程度的偏离。分析了这种偏离的主要原因。Curing reaction of the matrix resin (MR) was studied for the composites structural repair application through in-situ FTIR. Conversions of the epoxy radical at different curing temperatures were calculated and were compared with the gelation time of the MR system. Conversions of the epoxy radical were also compared with the viscosity changes vs. time at the same temperatures. When the curing temperature reaches the onset curing temperature (108°C) on DSC trace of MR, the conversion curve from in-situ FTIR tallied with the gelation time and the curve of viscosity vs. time by means of macroscopical methods. When the curing temperature is below 108°C, the conversion curve from in-situ FTIR will deviate from the curing degrees concluded from the gelation time and the curve of viscosity vs. time at the corresponding temperature. The main causes of the deviation were analyzed.

关 键 词：复合材料修复 基体树脂 固化反应 原位红外 凝胶化 粘度 

分 类 号：TB332[一般工业技术—材料科学与工程]