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首页> 外文期刊>Journal of Applied Polymer Science >ISOTHERMAL CURE KINETICS OF A DIGLYCIDYL ETHER OF BISPHENOL A/1,3-BISAMINOMETHYLCYCLOHEXANE (DGEBA/1,3-BAC) EPOXY RESIN SYSTEM
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ISOTHERMAL CURE KINETICS OF A DIGLYCIDYL ETHER OF BISPHENOL A/1,3-BISAMINOMETHYLCYCLOHEXANE (DGEBA/1,3-BAC) EPOXY RESIN SYSTEM

机译：双酚A / 1,3-二亚甲基环环己烷（DGEBA / 1,3-BAC）环氧树脂体系的二缩水甘油醚的等温固化动力学

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摘要

By employing differential scanning calorimetry, DSC, we have studied, under isothermal conditions, the kinetics of the cure reaction for a system containing a diglycidyl ether of bisphenol A (DGEBA) and 1,3-bisaminomethylcyclohexane (1,3-BAC) as a curing agent, over the temperature range of 60-110 degrees C. We have determined the conversions reached at several cure temperatures and the reaction rates. The experimental data, showing an autocatalytic behavior, were compared with the model proposed by Kamal, which includes two rate constants, k(1) and k(2), and two reaction orders, m and n. This model gives a good description of cure kinetics up to the onset of vitrification. The activation energies for these rate constants were 44-57 kJ/mol. The reaction orders present a moderate change but their sum is in the range 2.5-3. Diffusion control is incorporated to describe the cure in the latter stages (postvitrification region). By combining the autocatalytic model and a diffusion factor, it was possible to predict the cure kinetics over the whole range of conversion. (C) 1995 John Wiley and Sons, Inc. [References: 15]
机译：通过采用差示扫描量热法（DSC），我们在等温条件下研究了包含双酚A二缩水甘油醚（DGEBA）和1,3-双氨基甲基环己烷（1,3-BAC）的体系的固化反应动力学。固化剂，温度范围为60-110摄氏度。我们已经确定了几种固化温度和反应速率下的转化率。实验数据显示了一种自动催化行为，并与Kamal提出的模型进行了比较，该模型包括两个速率常数k（1）和k（2）以及两个反应阶数m和n。该模型很好地描述了直至玻璃化开始之前的固化动力学。这些速率常数的活化能为44-57kJ / mol。反应阶数变化不大，但总和为2.5-3。结合扩散控制来描述后期（玻璃化后区域）的固化。通过结合自动催化模型和扩散因子，可以预测整个转化率范围内的固化动力学。 （C）1995 John Wiley and Sons，Inc. [参考：15]

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