Dong-mei Zhao, Li-xia Li, Yang Zheng, Yang Zuo, Guo-dong Liu. TEMPERATURE DISTRIBUTION IN THE SAMPLE AND ITS EFFECT ON THE DETERMINATION OF HEAT CAPACITY IN DSC MEASUREMENTS. [J]. Acta Polymerica Sinica (7):754-758(2012)
DOI:
Dong-mei Zhao, Li-xia Li, Yang Zheng, Yang Zuo, Guo-dong Liu. TEMPERATURE DISTRIBUTION IN THE SAMPLE AND ITS EFFECT ON THE DETERMINATION OF HEAT CAPACITY IN DSC MEASUREMENTS. [J]. Acta Polymerica Sinica (7):754-758(2012) DOI: 10.3724/SP.J.1105.2012.11358.
TEMPERATURE DISTRIBUTION IN THE SAMPLE AND ITS EFFECT ON THE DETERMINATION OF HEAT CAPACITY IN DSC MEASUREMENTS
A method for calculating the temperature distribution in the polymer sample during DSC measurements was proposed in this paper based on the one-dimensional heat conduction equation and Tools-Narayanaswamy-Moynihan (TNM) model.It was found that the temperature lag increased remarkably with increasing sample thickness and heating rate.A maximum temperature difference between the center and the surface of a PS sample with 1.0 mm thickness was calculated to be 0.882 K when it was heated at a rate of 10 K/min after cooling at 1 K/min.Meanwhile
a method for calculating the sensible heat capacity of the polymer with different thicknesses after different thermal treatments was proposed.The theoretical results were consistent with the experimental data.
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