Dielectric spectroscopy measurements of the sub-Tg relaxations in amorphous ethyl cellulose: A relaxation magnitude study
CHAMPION, Dominique
Ingénierie Moléculaire et Sensorielle de l'Aliment et des Produits de Santé [IMSAPS]
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Ingénierie Moléculaire et Sensorielle de l'Aliment et des Produits de Santé [IMSAPS]
CHAMPION, Dominique
Ingénierie Moléculaire et Sensorielle de l'Aliment et des Produits de Santé [IMSAPS]
< Leer menos
Ingénierie Moléculaire et Sensorielle de l'Aliment et des Produits de Santé [IMSAPS]
Idioma
en
Article de revue
Este ítem está publicado en
Journal of Non-Crystalline Solids. 2005, vol. vol. 351, n° 14-15, p. p. 1167-1178
Elsevier
Resumen en inglés
Amorphous ethyl cellulose exhibits three secondary relaxations at temperatures below its glass transition. The fitted parameters that describe these processes and the comparison with other polysaccharides allow to ascribe ...Leer más >
Amorphous ethyl cellulose exhibits three secondary relaxations at temperatures below its glass transition. The fitted parameters that describe these processes and the comparison with other polysaccharides allow to ascribe the relaxations to lateral groups on one hand and to local main chain motion on the other hand. Their contributions to the dielectric constant overlap and induce a broad dielectric losses peak. The amplitude of one of these relaxations is found to decrease regularly with time. It is believed it comes from a gradual change of the polar groups chemical environment that constrains their motion.< Leer menos
Palabras clave en inglés
Dielectric loss and relaxation
Polymers
Organic compounds
Electrical and magnetic properties
Orígen
Importado de HalCentros de investigación