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首页> 外文期刊>Journal of Applied Polymer Science >Cure Kinetics of Ternary Blends of Epoxy Resins Studied by Nonisothermal DSC Data
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Cure Kinetics of Ternary Blends of Epoxy Resins Studied by Nonisothermal DSC Data

机译：非等温DSC数据研究环氧树脂三元共混物的固化动力学

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摘要

The curing kinetics of blends of diglycidyl ether of bisphenol A (DGEBA), cycloaliphatic epoxy resins, and carboxyl-terminated butadiene-acrylonitrile random copolymer (CTBN) in presence of 4,40-diamino diphenyl sulfone (DDS) as the curing agent was studied by nonisothermal differential scanning calorimetry (DSC) technique at different heating rates. The kinetic parameters of the curing process were determined by isoconversional method given by Malek for the kinetic analysis of the data obtained by the thermal treatment. A two-parameter (m, n) autocatalytic model (Sestak-Berggren equation) was found to be the most adequate selected to describe the cure kinetics of the studied epoxy resins. The values of E_a were found to be 88.6 kJ mol~(-1) and 61.6 kJ mol~(-1), respectively, for the studied two sample series. Nonisothermal DSC curves obtained using the experimental data show a good agreement with that theoretically calculated.
机译：研究了以4,40-二氨基二苯砜（DDS）为固化剂的双酚A二缩水甘油醚（DGEBA），脂环族环氧树脂和羧基封端的丁二烯-丙烯腈无规共聚物（CTBN）的共混物的固化动力学。通过非等温差示扫描量热法（DSC）在不同的加热速率下进行。固化过程的动力学参数是由Malek给出的等转换方法确定的，用于对热处理获得的数据进行动力学分析。发现最适合选择两个参数（m，n）的自催化模型（Sestak-Berggren方程）来描述所研究的环氧树脂的固化动力学。研究的两个样品系列的E_a值分别为88.6 kJ mol〜（-1）和61.6 kJ mol〜（-1）。使用实验数据获得的非等温DSC曲线与理论计算值显示出良好的一致性。

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