Relaxation dynamics in glycerol-water mixtures: I. Glycerol-rich mixtures

Alexander Puzenko, Yoshihito Hayashi, Yaroslav E. Ryabov, Igal Balin, Yuri Feldman*, Udo Kaatze, Ralph Behrends

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

Abstract

We discuss the relaxation dynamics of glycerol-water mixtures, as studied by dielectric spectroscopy in the frequency range from 1 Hz to 250 MHz and at temperatures between 173 and 323 K. The experimental results obtained for the glycerol-rich mixtures suggest that the main dielectric relaxation process, as well as the so-called high-frequency "excess wing" (EW) and dc conductivity, follow the same temperature dependence. This result indicates that all of these processes are induced by the same molecular origin. A new phenomenological function is proposed to describe the whole dielectric spectrum in the covered frequency range, and some possible mechanisms of dielectric behaviors through the dc conductivity, the main relaxation process, and the EW are discussed.

Original languageAmerican English
Pages (from-to)6031-6035
Number of pages5
JournalJournal of Physical Chemistry B
Volume109
Issue number12
DOIs
StatePublished - 31 Mar 2005

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