改性脂肪族胺类环氧树脂固化剂:非等温固化反应  

Modified Aliphatic Amine Curing Agent for Epoxy Resin:Non-Isothermal Curing Reaction

作　　者：张予东[1] 王艳萍[1,2] 张静[1,2] 刘恒[1,2] 毛立群[1,2] 

机构地区：[1]河南大学化学化工学院,河南开封475004 [2]清洁化工过程与技术工程中心,河南开封475004

出　　处：《河南大学学报（自然科学版）》2016年第6期702-709,共8页Journal of Henan University:Natural Science

基　　金：国家自然科学基金青年项目(21403053);河南大学第十四批教学改革项目(HDXJJG2014-74)

摘　　要：采用DSC法研究了改性脂肪族胺(DTP)/双酚A二缩水甘油醚(DGEBA)体系的非等温固化过程,结果表明,该固化反应是一个放热过程,且仅有一个对称的放热峰,对应于环氧胺开环加成反应.采用Flynn-Wall-Ozawa(FWO)模型关联活化能Eα与转化率α的关系,结果显示,该固化反应显示出与其他环氧树脂体系类似的反应规律.在反应开始时,该系统具有最高的表观活化能;但随着反应的进行,表观活化能逐渐降低.利用Málek模型研究该固化反应的动力学性质,根据模型特征参数αM、αp、α∞p确定了反应速率模型,即esták-Berggren(SB(m,n))经验模型.模型化研究表明,该固化反应过程具有自催化反应的特性,且模型与实验数据拟合情况较好.本文对DTP/DGEBA体系固化反应的研究有助于理解环氧-胺反应的机理和反应条件,为DTP/DGEBA固化工艺的选择提供了参考.The nonqsothermal curing reaction of the modification of aliphatic amines （DTP）/bisphenol A diglycidyl ether （DGEBA） system was investigated by using differential scanning calorimetry（DSC） method. The results indicate that the reaction is an exothermic process, and only one single and fairly symmetric exothermic peak can be found, which corresponds to the opening reaction of epoxy amine. The relationship between the effective activation energy and the conversion rate was established with Flynn-Wall Ozawa （FWO） model It is found that the reaction is similar to other epoxy resin systems following the same rules. In the initial stage, the system has the highest effective activation energy, while the effective activation energy decreases gradually as the reaction proceeds. Furthermore, the reaction rate model was determined as Sestdk-Berggren （SB（m, n）） empirical model according to the characteristic parameters of the model of aM .ap .ap, and the kinetics properties of the reaction was confirmed by Mcilek model. The simulated model discloses that the reaction is of autocatalytic characteristic, and the calculated reaction rates are in good agreement with the experimental values. The research on the curing reaction of DTP/ DGEBA system contributes to the understanding of the reaction mechanism and the condition, and provides a reference for the selection of DTP/ DGEBA curing process.

关 键 词：脂肪胺 固化 非等温 差示扫描量热仪 

分 类 号：O631[理学—高分子化学]