Time-evolution of the structure of organoclay/ polypropylene nanocomposites and its influence on time/temperature superposition principle - Mines Paris Accéder directement au contenu
Communication Dans Un Congrès Année : 2011

Time-evolution of the structure of organoclay/ polypropylene nanocomposites and its influence on time/temperature superposition principle

Résumé

We investigate the rheological properties of a nanocomposite in small amplitude oscillatory shear. The evolution of the storage modulus with time shows that this material is not stable: the microstructure changes continuously with time, due to the disorientation of the clay platelets and the build-up of a 3D network. This evolution of the microstructure is evaluated by measuring the apparent yield stress. A two-step kinetics is evidenced, whose parameters directly depends on temperature. This time-evolution is generally assumed to violate the time-temperature superposition principle. However, we demonstrate that the time-temperature equivalence always exists if we consider samples having the same microstructure.

Domaines

Matériaux
Fichier principal
Vignette du fichier
PPS2011_Zouari.pdf (302.14 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00674982 , version 1 (01-03-2012)

Identifiants

  • HAL Id : hal-00674982 , version 1

Citer

Riadh Zouari, Trystan Domenech, Edith Peuvrel-Disdier, Bruno Vergnes. Time-evolution of the structure of organoclay/ polypropylene nanocomposites and its influence on time/temperature superposition principle. 27th World Congress of the Polymer Processing Society, May 2011, Marrakech, Morocco. 5 p. ⟨hal-00674982⟩
172 Consultations
239 Téléchargements

Partager

Gmail Facebook X LinkedIn More