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首页> 外文期刊>Journal of Applied Polymer Science >KINETIC STUDY AND TIME-TEMPERATURE-TRANSFORMATION CURE DIAGRAM FOR AN EPOXY-DIAMINE SYSTEM
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KINETIC STUDY AND TIME-TEMPERATURE-TRANSFORMATION CURE DIAGRAM FOR AN EPOXY-DIAMINE SYSTEM

机译：环氧树脂系统的动力学研究和时温转变固化图

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摘要

The different steps involved in the curing reaction of a purified ether of bisphenol A (BADGE n = 0) and 1,2-diamine cyclohexane (DCH) were studied with the objective to calculate a time-temperature-transformation (TTT) isothermal cure diagram for this system. A kinetic model proposed by Horie et al.(6) was used and compared to the experimental data. Gelation times and conversions were measured using two different methods: solubility test and dynamic mechanical analysis (DMA). Results obtained by both methods show a reasonable agreement. Differential scanning calorimetry (DSC) data show a one-to-one relationship between T-g and fractional conversion, ct, independent of cure temperature. As a consequence, T-g can be used as a measure of conversion. Using the model parameters and the relationship between T-g and conversion, T-g versus In time are calculated and found to agree with DSC experimental results for isothermal cure temperatures from 60 to 100 degrees C. A kinetically controlled master curve for isothermal cure is obtained by shifting T-g versus In time data to a reference temperature, T-r = 80 degrees C. The apparent activation energy was calculated from gel times measurements (12.63 kcal mol(-1) = 52.88 kJ mol(-1) from solubility test and 12.28 kcal mol(-1) = 51.42 kJ mol(-1) from DMA measurements). Isoconversion contours were calculated by numerical integration of the kinetic model. (C) 1997 John Wiley & Sons, Inc. [References: 20]
机译：研究了双酚A精制醚（BADGE n = 0）和1,2-二胺环己烷（DCH）固化反应的不同步骤，目的是计算时间-温度转化（TTT）等温固化图对于这个系统。使用了Horie等人（6）提出的动力学模型，并将其与实验数据进行了比较。使用两种不同的方法测量胶凝时间和转化率：溶解度测试和动态力学分析（DMA）。通过两种方法获得的结果均显示出合理的一致性。差示扫描量热法（DSC）数据显示了T-g与分数转化ct之间的一对一关系，而与固化温度无关。结果，T-g可以用作转化的量度。使用模型参数以及Tg和转化率之间的关系，计算Tg与In时间的关系，发现与DSC实验结果吻合，表明等温固化温度为60到100摄氏度。通过移动Tg获得动力学控制的等温固化主曲线相对于时间数据到参考温度Tr = 80摄氏度。表观活化能由胶凝时间测量值计算（溶解度测试为12.63 kcal mol（-1）= 52.88 kJ mol（-1）和12.28 kcal mol（- 1）=来自DMA测量的51.42 kJ mol（-1）。通过动力学模型的数值积分来计算等转换轮廓。 （C）1997 John Wiley＆Sons，Inc. [参考：20]

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