Cure kinetics of epoxy resins studied by non-isothermal DSC data

IF 3.5 2区化学 Q2 CHEMISTRY, ANALYTICAL

Thermochimica Acta Pub Date : 2002-02-07 DOI:10.1016/S0040-6031(01)00672-4

D Roşu, C.N Caşcaval, F Mustątǎ, C Ciobanu

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引用次数: 281

Abstract

The curing kinetics of diglycidyl ether of bisphenol A (DGEBA) and diglycidyl ether of hydroquinone (DGEHQ) epoxy resins in presence of diglycidyl aniline as a reactive diluent and triethylenetetramine (TETA) as the curing agent was studied by non-isothermal differential scanning calorimetry (DSC) technique at different heating rates. The kinetic parameters of the curing process were determined by isoconversional method given by Málek for the kinetic analysis of the data obtained by the thermal treatment. A two-parameter (m, n) autocatalytic model (Šesták–Berggren equation) was found to be the most adequate selected to describe the cure kinetics of the studied epoxy resins. Reactive diluent decreases both the activation energy and the cure kinetic parameters. Non-isothermal DSC curves obtained using the experimental data show a good agreement with that theoretically calculated.

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用非等温DSC数据研究环氧树脂固化动力学

采用非等温差示扫描量热法(DSC)研究了双酚A二缩水甘油酯醚(DGEBA)和对苯二酚二缩水甘油酯醚(DGEHQ)环氧树脂在二缩水甘油酯苯胺为反应稀释剂、三乙烯四胺(TETA)为固化剂下不同升温速率下的固化动力学。固化过程的动力学参数由Málek给出的等转换方法确定，并对热处理所得数据进行动力学分析。发现双参数(m, n)自催化模型(Šesták-Berggren方程)最适合描述所研究的环氧树脂的固化动力学。活性稀释剂降低了活化能和固化动力学参数。用实验数据得到的非等温DSC曲线与理论计算结果吻合较好。

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来源期刊

Thermochimica Acta 化学-分析化学

CiteScore

6.50

自引率

8.60%

发文量

210

审稿时长

40 days

期刊介绍： Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes