Memory in the aging of a polymer glass

Ludovic Bellon; Sergio Ciliberto; Claude Laroche

Memory in the aging of a polymer glass

Ludovic Bellon ¹ Sergio Ciliberto ¹ Claude Laroche ¹

1 Phys-ENS - Laboratoire de Physique de l'ENS Lyon

Abstract : Low frequency dielectric measurements on plexiglass (PMMA) show that cooling and heating the sample at constant rate give an hysteretic dependence on temperature of the dielectric constant $\epsilon$. A temporary stop of cooling produces a downward relaxation of $\epsilon$. Two main features are observed i) when cooling is resumed $\epsilon$ goes back to the values obtained without the cooling stop (i.e. the low temperature state is independent of the cooling history) ii) upon reheating $\epsilon$ keeps the memory of the aging history ({\it Memory}). The analogies and differences with similar experiments done in spin glasses are discussed.

Keywords : memory effect aging polymer PMMA

Document type :

Journal articles

Domain :

Physics [physics] / Condensed Matter [cond-mat] / Materials Science [cond-mat.mtrl-sci]

Physics [physics] / Condensed Matter [cond-mat] / Statistical Mechanics [cond-mat.stat-mech]

Complete list of metadatas

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00176108
Contributor : Ludovic Bellon <>
Submitted on : Tuesday, October 2, 2007 - 3:05:41 PM
Last modification on : Thursday, April 19, 2018 - 2:54:03 PM

Memory in the aging of a polymer glass

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Memory in the aging of a polymer glass

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