On the dielectric susceptibility spectra of supercooled o-terphenyl

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Abstract

Supercooled o -terphenyl has been the subject of many investigations including dielectric relaxation spectroscopy. Due to the low dielectric strength and the tendency to crystallize at elevated temperatures, a detailed shape analysis of the loss profile from the glass transition temperature Tg to ∼1.2 Tg is not available for the neat glass former. Assessing the origin of the different temperature dependencies of translational and rotational motions in supercooled liquids and its possible connection to heterogeneity requires this knowledge regarding the possible changes in the relaxation-time distribution across the 100 s-100 ns relaxation-time range. This note provides this information for o -terphenyl on the basis of a master curve representation: time-temperature superposition applies with a constant stretching exponent of Β=0.5 in the range of interest.

Original languageEnglish (US)
Article number154502
JournalJournal of Chemical Physics
Volume123
Issue number15
DOIs
StatePublished - Oct 15 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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