In this review, the characteristic temperatures for epoxy polymers and epoxy matrices of fiber-reinforced composites in the glass-transition ( α-transition) range determined using different methods of thermal analysis (DSC, DMA, and TMA) are compared. The influence of loading frequency in the DMA method and of uniformity of heating and postcuring of specimens in all the methods is revealed. The agreement between the glass-transition temperatures given by different methods is achieved using the same characteristic points in experimental curves and the same time parameters (the frequency of external actions, heating rate, and the uniformity of temperature distribution in specimens in testing chambers).

中文翻译：

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通过热分析方法获得的环氧聚合物的玻璃化转变温度的比较

在这篇综述中，比较了使用不同热分析方法（DSC、DMA 和 TMA）确定的玻璃化转变（α 转变）范围内的环氧聚合物和纤维增强复合材料的环氧基质的特征温度。揭示了 DMA 方法中加载频率以及所有方法中试样加热和后固化均匀性的影响。不同方法给出的玻璃化转变温度之间的一致性是使用实验曲线中相同的特征点和相同的时间参数（外部作用的频率、加热速率和测试室样品中温度分布的均匀性）来实现的。