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一、绪论差示扫描量热法(DSC)是在差示热分析(DTA)的基础上发展起来的.目前,有关论述聚合物的文献中,出现了以DSC为手段研究聚合物的结构、相转变、化学反应,以及测定聚合物的结晶度、玻璃化温度、比热、分子量等的报导,但有些文献忽视了某些实验量的正确含义,以致用不同的技术表征聚合物特性时会引起误解。本文简略介绍DTA和DSC的基本概念,指出DSC通过温度和热焓的校准使能正确定量,并拟通过用DSC对聚合物研究的例子,阐明各实验量的正确含义,以便正确理解和应用DSC的实验数据。
I. INTRODUCTION Differential Scanning Calorimetry (DSC) was developed on the basis of differential thermal analysis (DTA) .At present, in the literatures about polymers, DSC has been used to study the structure of polymers, Phase transitions, chemical reactions, and the determination of crystallinity, glass transition temperature, specific heat, molecular weight, etc., some literatures have ignored the correct meaning of some experimental quantities, so that when using different techniques to characterize the polymer properties Cause misunderstanding In this paper, the basic concepts of DTA and DSC are briefly introduced. It is pointed out that the calibration of temperature and enthalpy by DSC can be correctly quantified, and it is proposed that the correct meaning of each experiment should be clarified through the example of DSC study of polymers so that the correct understanding and application of DSC Experimental data.