Connecting thermodynamics and dynamics in a supercooled liquid

Cresolphthalein-dimethylether

Subarna Samanta, Osamu Yamamuro, Ranko Richert

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have measured adiabatic calorimetry as well as dielectric relaxation spectroscopy in the linear and non-linear response regime of viscous cresolphthalein-dimethylether. On the basis of the Adam-Gibbs model, the experimental results facilitate the comparison of temperature versus field induced changes in entropy and of their impacts on the dielectric relaxation times. Across six decades of the structural relaxation times, the Adam-Gibbs model provides a good account of the temperature dependence of the dynamics, while a comparable amount of field induced total entropy change leads to a four-times smaller effect regarding the change of time constants. For this material, only a small fraction of the total entropy change that originates from strongly polarizing the sample appears to be relevant for the dynamics in the sense of Adam-Gibbs.

Original languageEnglish (US)
Pages (from-to)57-62
Number of pages6
JournalThermochimica Acta
Volume636
DOIs
StatePublished - Jul 20 2016

Fingerprint

Entropy
Dielectric relaxation
Thermodynamics
entropy
Relaxation time
thermodynamics
Liquids
liquids
relaxation time
Structural relaxation
Calorimetry
time constant
Temperature distribution
temperature distribution
heat measurement
Spectroscopy
temperature dependence
spectroscopy
cresolphthalein
Temperature

Keywords

  • Adam-Gibbs model
  • Configurational entropy
  • Dielectric relaxation
  • Glass-forming liquids
  • Non-linear dynamics

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Instrumentation

Cite this

Connecting thermodynamics and dynamics in a supercooled liquid : Cresolphthalein-dimethylether. / Samanta, Subarna; Yamamuro, Osamu; Richert, Ranko.

In: Thermochimica Acta, Vol. 636, 20.07.2016, p. 57-62.

Research output: Contribution to journalArticle

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