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Study of poly(bisphenol A carbonate) relaxation kinetics at the glass transition temperature

Delbreilh, Laurent and Dargent, Eric and Grenet, Jean and Saiter, Jean-marc and Bernès, Alain and Lacabanne, Colette Study of poly(bisphenol A carbonate) relaxation kinetics at the glass transition temperature. (2007) European Polymer Journal, vol. 43 (n° 1). pp. 249-254. ISSN 0014-3057

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Official URL: http://dx.doi.org/10.1016/j.eurpolymj.2006.09.019

Abstract

In this work, the variations of the relaxation times are investigated above and below the glass transition temperature of a model amorphous polymer, the polycarbonate. Three different techniques (calorimetric, dielectric and thermostimulated currents) are used to achieve this goal. The relaxation time at the glass transition temperature was determined at the temperature dependence convergence of the relaxation times calculated with dynamic dielectric spectroscopy (DDS) for the liquid state and thermostimulated depolarisation currents (TSDC) for the vitreous state. We find a value of s(Tg) = 110 s for PC samples. The knowledge of the temperature dependence, s(T), and the value s(Tg) enables to determine the glass-forming liquid fragility index, m. We find m = 178 ± 5.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at European Polymer Journal website : http://www.sciencedirect.com/science/journal/00143057
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Institut National des Sciences Appliquées de Rouen - INSA (FRANCE)
Other partners > Université de Rouen - UR (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Polymères, Biopolymères, Membranes - PBM (Mont Saint Aignan, France) - Etude et Caractérisations des Composés Amorphes et des Polymères - LECAP
Centre Interuniversitaire de Recherche et d'Ingénierie des Matériaux - CIRIMAT (Toulouse, France) - Laboratoire de Physique des Polymères
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Deposited By:Celine Cabaup

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