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A single-frequency test for one-parameter models of the linear thermo-visco-elastic response of glass-forming liquids

N. L. Ellegaard·T. Christensen·N. B. Olsen·J. C. Dyre
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Abstract

A master equation description of the inherent dynamics is used to calculate the frequency-dependent linear thermo-visco-elastic response functions of a glass-forming liquid. From the imaginary parts of the isobaric specific heat, isothermal bulk modulus, and isobaric thermal expansion coefficient, we define a quantity $Λ_{Tp}(ω)$ with the property that $Λ_{Tp}(ω)=1$ is equivalent to having a one-parameter description of the linear thermo-visco-elastic response. This provides an alternative to the well-known criterion based on the Prigogine-Defay ratio.

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N. L. Ellegaard, T. Christensen, N. B. Olsen, J. C. Dyre. 2004-05-31. A single-frequency test for one-parameter models of the linear thermo-visco-elastic response of glass-forming liquids. https://doi.org/10.1063/1.2434963

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