OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

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, 43 (1). 249-254. ISSN 0014-3057

(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

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


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
HAL Id:hal-00808431
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut National des Sciences Appliquées de Rouen - INSA (FRANCE)
Other partners > Université de Rouen - UR (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
Deposited On:14 May 2009 14:08

Repository Staff Only: item control page