Mechanical Spectroscopy of Side Chain Liquid Crystalline Polymers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal de Physique IV Proceedings Année : 1996

Mechanical Spectroscopy of Side Chain Liquid Crystalline Polymers

S. Etienne
L. David
P. Sixou
  • Fonction : Auteur
C. Laye
  • Fonction : Auteur

Résumé

we report a low frequency mechanical relaxation study of molecular motions near and below glass transition in side chain liquid crystal polymers (SCLCP) in the cholesteric state. The SCLCP was a blend of crosslinked and uncrosslinked materials. Different compositions were studied. These materials exhibit low temperature relaxation processes and a main relaxation connected to the glass transition. Localised motions are responsible for the low temperature processes while the main relaxation exhibits cooperative features and is sensitive to the amount of crosslinked fraction. The relaxation time in the glass transition range when plotted against normalised reciprocal temperature shows that the molecular motions display a fragile character in agreement with the highly cooperative feature and strong physical aging effects. These observations are discussed in the frame of correlated motions involved in the liquid glass transition.

Domaines

Articles anciens
Fichier principal
Vignette du fichier
ajp-jp4199606C8123.pdf (189.98 Ko) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

jpa-00254554 , version 1 (04-02-2008)

Identifiants

Citer

S. Etienne, L. David, P. Sixou, C. Laye. Mechanical Spectroscopy of Side Chain Liquid Crystalline Polymers. Journal de Physique IV Proceedings, 1996, 06 (C8), pp.C8-571-C8-574. ⟨10.1051/jp4:19968123⟩. ⟨jpa-00254554⟩

Collections

AJP
44 Consultations
100 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More