The glass transition temperature versus the fictive temperature
The glass transition temperature versus the fictive temperature
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DOI：
10.1016/j.jnoncrysol.2007.04.025
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发表时间：
2007-08-01
影响因子：
3.5
通讯作者：
Simon, Sindee L.
中科院分区：
文献类型：
--
作者：
Badrinarayanan, Prashanth;Zheng, Wei;Simon, Sindee L.
对聚苯乙烯样品用毛细管示差法和差示扫描量热法（DSC）比较了冷却时测得的玻璃化转变温度（T-g）值和加热时测得的极限假想温度（T-f（′））值随冷却速率的变化。这两种技术的结果表明，T-1（′）系统地低于T-g，可能是由于冷却时弛豫的宽度。使用Tool-Narayanaswamy-Moynihan（TNM）模型拟合来自折光仪和DSC的实验数据，以确定T-g值高于T-1（-）（C）2007 Elsevier B. V.的原因。版权所有。
A comparison of the values of the glass transition temperature (T-g) measured on cooling and the limiting fictive temperature (T-f(')) measured on heating as a function of cooling rate is performed for a polystyrene sample using both capillary dilatometry and differential scanning calorimetry (DSC). The results from both techniques indicate that T-1(') is systematically lower than T-g presumably due to the breadth of the relaxation on cooling. The Tool-Narayanaswamy-Moynihan (TNM) model is used to fit the experimental data from dilatometry and DSC in order to ascertain the origins of the higher value of T-g compared to T-1(-) (C) 2007 Elsevier B.V. All rights reserved.