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Casalini R, Mohanty U, Roland CM. Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids. J Chem Phys. 2006;125(1):014505doi: 10.1063/1.2206582.
Casalini, R., Mohanty, U., & Roland, C. M. (2006). Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids. The Journal of chemical physics, 125(1), 014505. https://doi.org/10.1063/1.2206582
Casalini, R, et al. "Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids." The Journal of chemical physics vol. 125,1 (2006): 014505. doi: https://doi.org/10.1063/1.2206582
Casalini R, Mohanty U, Roland CM. Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids. J Chem Phys. 2006 Jul 07;125(1):014505. doi: 10.1063/1.2206582. PMID: 16863314.
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J Chem Phys. 2006 Jul 07;125(1):014505. doi: 10.1063/1.2206582.

Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids.

The Journal of chemical physics

R Casalini, U Mohanty, C M Roland

Affiliations

  1. Naval Research Laboratory, Chemistry Division, Washington DC 20375-5342, USA. [email protected]

PMID: 16863314 DOI: 10.1063/1.2206582

Abstract

The recently discovered scaling law for the relaxation times, tau(T,upsilon) = I(Tupsilon(gamma)), where T is temperature and upsilon the specific volume, is derived by a revision of the entropy model of the glass transition dynamics originally proposed by Avramov [J. Non-Cryst. Solids 262, 258 (2000)]. In this modification the entropy is calculated by an alternative route. The resulting expression for the variation of the relaxation time with T and upsilon is shown to accurately fit experimental data for several glass-forming liquids and polymers over an extended range encompassing the dynamic crossover. From this analysis, which is valid for any model in which the relaxation time is a function of the entropy, we find that the scaling exponent gamma can be identified with the Gruneisen constant.

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