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首页> 外文期刊>Journal of Applied Polymer Science >Kinetics and thermal characterization of epoxy-amine systems
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Kinetics and thermal characterization of epoxy-amine systems

机译：环氧胺体系的动力学和热表征

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The curing behavior of epoxy resins was analyzed based on a simple kinetic model. We simulated the curing kinetics and found that it fits the experimental data well for both diglycidylether of bisphenol A-4,4'-methylene dianiline and diglycidylether of bisphenol A-carboxyl-terminated butadiene acrylonitrile-4,4'-methylene dianiline systems. The kinetic results showed the curing of epoxy resins involves different reactive process and reaction stages, and the value of activation energy is dependent on the degree of conversion. By analyzing the effect of vitrification, at low curing temperature, we found the curing reaction at the later stage was practically diffusion-controlled for unmodified resin, and the rubber component did not markedly decrease Tg at the early stage of reaction as would be expected.
机译：基于简单的动力学模型分析了环氧树脂的固化行为。我们模拟了固化动力学，发现它与双酚A-4,4'-亚甲基二苯胺的二缩水甘油醚和双酚A-羧基封端的丁二烯丙烯腈-4,4'-亚甲基二苯胺体系的二缩水甘油醚非常吻合。动力学结果表明，环氧树脂的固化涉及不同的反应过程和反应阶段，活化能的值取决于转化率。通过分析玻璃化的作用，在较低的固化温度下，我们发现未改性树脂在后期的固化反应实际上是扩散控制的，并且橡胶组分在反应的早期并未显着降低Tg。

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