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Journal Articles EPL - Europhysics Letters Year : 2000

Memory in the aging of a polymer glass

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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.

Dates and versions

ensl-00176108 , version 1 (02-10-2007)

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Ludovic Bellon, Sergio Ciliberto, Claude Laroche. Memory in the aging of a polymer glass. EPL - Europhysics Letters, 2000, 51, pp.551-556. ⟨10.1209/epl/i2000-00368-1⟩. ⟨ensl-00176108⟩
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