ABSTRACT In this paper, we examined glass transition, a very important parameter that determines the properties and applications of epoxy resins by the innovative approach of kinetic study. The effect of thermoplastic filler Polyethylene Glycol-1000 (PEG-1000) on the kinetics of glass transition temperature of epoxy was analysed by varying the filler loadings and the heating rates. The differential scanning calorimetry curves were plotted at heating rates of 5, 10, 15 and 20°C, respectively and the kinetics of glass transition by varying the heat rates was investigated. Kissinger and Moynihan methods were employed to analyse the glass transition kinetics. The changes in glass transition have been interpreted remarkably with the constrained polymer region of the systems. The improvement in toughness of about ≈ 213% was obtained compared to the neat epoxy with an addition of about 1 wt-% of PEG loading. The toughening mechanisms were elucidated by analysing the scanning electron microscopic images of fractured samples.

中文翻译：

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PEG增韧环氧树脂玻璃化转变温度动力学的理论模型

摘要 在本文中，我们通过动力学研究的创新方法研究了玻璃化转变，这是一个非常重要的参数，它决定了环氧树脂的性能和应用。通过改变填料用量和加热速率，分析了热塑性填料聚乙二醇-1000 (PEG-1000) 对环氧树脂玻璃化转变温度动力学的影响。分别在 5、10、15 和 20°C 的加热速率下绘制差示扫描量热曲线，并通过改变加热速率研究玻璃化转变动力学。Kissinger 和 Moynihan 方法用于分析玻璃化转变动力学。玻璃化转变的变化已经通过系统的受限聚合物区域得到了显着的解释。与添加约 1 wt% PEG 负载的纯环氧树脂相比，韧性提高了约 ≈ 213%。通过分析断裂样品的扫描电子显微图像阐明了增韧机制。