Dielectric study of supercooled triphenylphosphite and butyronitrile: Comparison with a mesoscopic model

Bernd Schiener, Alois Loidl, Ralph Chamberlin, Roland Böhmer

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Abstract

Dielectric relaxation has been studied in the supercooled liquids triphenylphosphite (TPP) and butyrontrile (BN). BN is relatively strong according to Angell's classification and can be characterized by a fragility index m = 47. TPP, on the other hand, appears to be the most fragile non-polymeric liquid studied so far (m = 160). The dielectric response of the two glass-formers exhibits different degrees of non-exponentiality which is analyzed in terms of a mesoscopic model of dynamically correlated domains. The relation of this model to the strong versus fragile liquid classification scheme is discussed.

Original languageEnglish (US)
Pages (from-to)243-251
Number of pages9
JournalJournal of Molecular Liquids
Volume69
Issue number9 SPEC. ISS.
DOIs
StatePublished - Jul 1996

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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