Inelastic light scattering study of hydrogen-bonded glass formers: Glycerol and ethanol

V. A. Zykova, N. V. Surovtsev

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1 Citation (Scopus)

Abstract

Temperature dependences of the structural relaxation time τα(T) of two hydrogen-bonded glass formers, glycerol and ethanol, were investigated by depolarized light scattering technique. τα(T) of glycerol demonstrates a transition from the Arrhenius law at high temperatures to a non-Arrhenius behavior at TA ~ 366 K. Combination of derivative analysis results for τα(T) from light scattering and dielectric spectroscopes reveals this transition near ~ 200 K in the case of ethanol. The obtained values of TA are close to the temperatures below which the excess of the Landau-Placzek ratio, associated with the appearance of locally favored structures, was observed earlier.

Original languageEnglish
Pages (from-to)429-434
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume471
DOIs
Publication statusPublished - 1 Sep 2017

Keywords

  • Alpha relaxation
  • Fragile behavior
  • Glass-forming liquids
  • Raman scattering
  • STRUCTURAL GLASS
  • FORMING LIQUIDS
  • ALPHA-RELAXATION
  • VISCOSITY
  • DIELECTRIC-SPECTROSCOPY
  • HETEROGENEOUS DYNAMICS
  • SUPERCOOLED LIQUIDS
  • TRANSITION
  • BETA-RELAXATION
  • MONOHYDROXY ALCOHOLS

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