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差示扫描量热仪对物质相变潜热的精确量度
Accurate Determination of Latent Heat via Differential Scanning Calorimetry
【摘要】 针对差示扫描量热仪(DSC)曲线相变前后的基线产生位移时如何计算相变潜热的问题,提出了1种零相变潜热等价基线的概念。相变潜热即为DSC热流曲线与零相变潜热等价基线所围的面积。这一曲线可用迭代法求得。运用这一方法测定了尼龙66的真实相变潜热。
【Abstract】 To overcome the problem of DSC baseline displacement before and after the phase transition,a concept of equivalent non-latent heat baseline is proposed to calculate the latent heat.The real latent heat is the area enclosed by DSC heat flow curve and equivalent non-latent heat baseline.This curve could be evaluated by an iterative procedure.The real latent heat of Nylon 66 is measured by the proposed method.
【关键词】 差示扫描量热仪;
潜热;
零相变潜热等价基线;
【Key words】 Differential scanning calorimetry(DSC); Latent heat; Equivalent non-latent heat baseline;
【Key words】 Differential scanning calorimetry(DSC); Latent heat; Equivalent non-latent heat baseline;
- 【文献出处】 分析测试学报 ,Journal of Instrumental Analysis , 编辑部邮箱 ,2006年02期
- 【分类号】O657.99
- 【被引频次】15
- 【下载频次】1197