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29 March 2024
 
  » pubmed » pmid15904195

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Intrinsic aging and effective viscosity in the slow dynamics of a soft glass with tunable elasticity
Laurence Ramos ; Luca Cipelletti ;
Date 22 Apr 2005
Journal Phys Rev Lett, 94 (15), 158301
AbstractWe investigate by rheology and light scattering the influence of the elastic modulus, G0, on the slow dynamics and the aging of a soft glass. We show that the slow dynamics and the aging can be entirely described by the evolution of an effective viscosity, eta(eff), defined as the characteristic time measured in a stress relaxation experiment times G0. At all times, eta(eff) is found to be independent of G0, of elastic perturbations, and of the rate at which the sample is quenched in the glassy phase. We propose a simple model that links eta(eff) to the internal stress built up at the fluid-to-solid transition.
Source PubMed, pmid15904195
Other source [GID 832913] cond-mat/0411078
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