Time Temperature Superposition in Soft Glassy Materials

Details Time Temperature Superposition in Soft Glassy Materials Time Temperature Superposition in Soft Glassy Materials

2012-03-26

arxiv.org/abs/1203.5577v1

Soft Matter, 8, 4171 - 4176, 2012

Physics

Condensed Matter

Soft Condensed Matter

19 pages, 7 figures

Scientific paper

10.1039/c2sm07071e

Soft glassy materials are out of thermodynamic equilibrium and show time dependent slowing down of the relaxation dynamics. Under such situation these materials follow Boltzmann superposition principle only in the effective time domain, wherein time dependent relaxation processes are scaled by a constant relaxation time. In this work we extend effective time framework to successfully demonstrate time - temperature superposition of creep and stress relaxation data of a model soft glassy system comprised of clay suspension. Such superposition is possible when average relaxation time of the material changes with time and temperature without affecting shape of the spectrum. We show that variation in relaxation time as a function of temperature facilitates prediction of long and short time rheological behavior through time - temperature superposition from the experiments carried out over experimentally accessible timescales.

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