Skip to Main content Skip to Navigation
Theses

Influence d'un cisaillment sinusoidal sur la dynamique microscopique de vieillissement d'un verre colloidal

Abstract : This experimental work tries to better characterize the effects of shearing upon the aging of colloidal glasses at a microscopic level. The rearrangement dynamics of the system is studied via a multiple light scattering technique (MSDWS) especially developed in this thesis. We show that under high oscillatory shear the system is rejuvenated and that it starts aging when the shear is stopped. Hence, at a microscopic level, high shear is equivalent for theses systems to thermal quench for other glassy materials. Furthermore we show that a gentle oscillatory shear help the system to age. We coined this phenomena "overaging". Theses two antagonistic effects (rejuvenation and overaging) are also observed on glassy polymer submitted to temperature steps. We eventually give a unified description of theses effects for the different perturbation within the frame of the SGR model. It clearly shows that an external perturbation broadens the distribution of relaxation for these systems.
Complete list of metadata

Cited literature [146 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00002476
Contributor : Virgile Viasnoff <>
Submitted on : Tuesday, February 25, 2003 - 3:21:08 PM
Last modification on : Wednesday, December 9, 2020 - 3:12:46 PM
Long-term archiving on: : Tuesday, September 11, 2012 - 7:55:24 PM

Identifiers

  • HAL Id : tel-00002476, version 1

Citation

Virgile Viasnoff. Influence d'un cisaillment sinusoidal sur la dynamique microscopique de vieillissement d'un verre colloidal. Analyse de données, Statistiques et Probabilités [physics.data-an]. Université Pierre et Marie Curie - Paris VI, 2003. Français. ⟨tel-00002476⟩

Share

Metrics

Record views

347

Files downloads

349