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Glass transition investigated by a combined protocol using thermostimulated depolarization currents and differential scanning calorimetry |
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| Authors: | L. Delbreilh M. Negahban M. Benzohra C. Lacabanne J. M. Saiter |
| Affiliation: | (1) Faculté des Sciences, LECAP PBS, FRE3101, Institut des Matériaux de Rouen, Université de Rouen, Avenue de l’Université BP 12, 76801 Saint Etienne du Rouvray, France;(2) Department of Engineering Mechanics, University of Nebraska-Lincoln, Lincoln, NE, USA;(3) Laboratoire de Physique des Polymères, Institut CARNOT, CIRIMAT, UMR5085, Université Paul Sabatier, 118 route de Narbonne, 31065 Toulouse Cedex, France |
| Abstract: | 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. |
| Keywords: | Glass transition Differential scanning calorimetry Thermostimulated currents |
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