Enthalpy recovery in glassy materials: heterogeneous versus homogenous models

The Journal of Chemical Physics
Shobeir K S Mazinani, Ranko Richert

Abstract

Models of enthalpy relaxations of glasses are the basis for understanding physical aging, scanning calorimetry, and other phenomena that involve non-equilibrium and non-linear dynamics. We compare models in terms of the nature of the relaxation dynamics, heterogeneous versus homogeneous, with focus on the Kovacs-Aklonis-Hutchinson-Ramos (KAHR) and the Tool-Narayanaswamy-Moynihan (TNM) approaches. Of particular interest is identifying the situations for which experimental data are capable of discriminating the heterogeneous from the homogeneous scenario. The ad hoc assumption of a single fictive temperature, T(f), is common to many models, including KAHR and TNM. It is shown that only for such single-T(f) models, enthalpy relaxation of a glass is a two-point correlation function in reduced time, implying that experimental results are not decisive regarding the underlying nature of the dynamics of enthalpy relaxation. We also find that the restriction of the common TNM model to a Kohlrausch-Williams-Watts type relaxation pattern limits the applicability of this approach, as the particular choice regarding the distribution of relaxation times is a more critical factor compared with isothermal relaxation experiments. As a result, s...Continue Reading

References

Aug 1, 1986·Physical Review. B, Condensed Matter·N O Birge
Jun 24, 1985·Physical Review Letters·N O Birge, S R Nagel
Oct 14, 2000·Annual Review of Physical Chemistry·M D Ediger
Aug 5, 2004·The Journal of Chemical Physics·Vassiliy Lubchenko, Peter G Wolynes
Aug 25, 2004·Physical Review Letters·Nicolas GiovambattistaH Eugene Stanley
Dec 17, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ivan Saika-Voivod, Francesco Sciortino
Aug 11, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Nicolas GiovambattistaH Eugene Stanley
Aug 11, 2005·Physical Review Letters·P LunkenheimerA Loidl
Dec 15, 2005·The Journal of Chemical Physics·Gregor Diezemann
Oct 10, 2006·Physical Review Letters·Ranko Richert, Susan Weinstein
Jul 24, 2008·The Journal of Physical Chemistry. B·Wei Huang, Ranko Richert
Oct 15, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Kang Chen, Kenneth S Schweizer
May 27, 2009·The Journal of Chemical Physics·Wei Huang, Ranko Richert
Apr 7, 2010·Physical Review Letters·Ranko Richert
Sep 28, 2010·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·P LunkenheimerA Loidl
Nov 9, 2010·The Journal of Chemical Physics·Tina HecksherJeppe C Dyre
Mar 10, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·R KahlauE A Rössler
Apr 19, 2011·The Journal of Chemical Physics·Ranko Richert

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Citations

Jan 15, 2013·The Journal of Physical Chemistry. B·Ranko RichertAlois Loidl
Jan 3, 2013·The Journal of Chemical Physics·Jonathan R Brown, John D McCoy
Feb 12, 2014·The Journal of Chemical Physics·Subarna Samanta, Ranko Richert
Apr 24, 2015·The Journal of Chemical Physics·Birte RiechersRanko Richert
Oct 3, 2018·Physical Chemistry Chemical Physics : PCCP·Birte Riechers, Ranko Richert
Jan 3, 2019·The Journal of Chemical Physics·Ranko Richert
Sep 28, 2017·Physical Review Letters·Kristine Niss
Mar 10, 2019·The Journal of Chemical Physics·Ulyana S Cubeta, Vlad Sadtchenko
Feb 7, 2013·Physical Review Letters·M PaluchS Hensel-Bielowka

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Methods Mentioned

BETA
differential scanning calorimetry

Software Mentioned

MATHEMATICA
KAHR

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