Glass transition investigated by a combined protocol using thermostimulated depolarization currents and differential scanning calorimetry

被引：27
作者：
Delbreilh, L. [1 ]
Negahban, M. [2 ]
Benzohra, M. [1 ]
Lacabanne, C. [3 ]
Saiter, J. M. [1 ]
机构：
[1] Univ Rouen, Inst Mat Rouen, Fac Sci, LECAP PBS,FRE3101, F-76801 St Etienne, France
[2] Univ Nebraska, Dept Engn Mech, Lincoln, NE USA
[3] Univ Toulouse 3, Inst CARNOT, Lab Phys Polymeres, CIRIMAT,UMR5085, F-31065 Toulouse, France
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2009年 / 96卷 / 03期
关键词：
Glass transition; Differential scanning calorimetry; Thermostimulated currents; ENTHALPY RELAXATION; STRUCTURAL RELAXATION; POLYMERS; TEMPERATURE; FRAGILITY; POLY(ETHYLENE-TEREPHTHALATE); POLYCARBONATE; DSC;
D O I：
10.1007/s10973-009-0060-1
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Relaxation times of bisphenol A polycarbonate around the glass transition temperature are estimated using the combination of differential scanning calorimetry (DSC) and thermostimulated depolarization currents (TSDC). These measurements are performed using samples with different thermal histories below and above the vitrification transformation. This protocol enables the extension of the range of equilibrium relaxation times measured by dielectric spectroscopy. By this mean we may recalculate the values of the Kauzmann temperature and fragility index.
引用
收藏
页码：865 / 871
页数：7
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