Dielectric properties of dimethyl ether+ethanol liquid mixture at 293.2 K

Taka Aki Hoshina, Koichi Kasahara, Tomoya Tsuji, Yoshiyuki Sato, Hiroshi Inomata

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1 Citation (Scopus)


The dielectric spectra of dimethyl ether (DME) + ethanol liquid mixture were measured at 293.2 K in the frequency range of 0.5-8.5 GHz. The dielectric spectra were correlated with single-phase Debye equation, and the static dielectric constants and the relaxation times for DME+ethanol mixtures were determined. These dielectric properties decreased with increasing DME concentration. The effective averaged angular Kirkwood correlation factors of DME+ethanol mixtures were calculated from the static dielectric constants. The concentration dependence of Kirkwood correlation factors showed concave shapes and has a minimum around 40 mol% of DME. This indicates that the hydrogen bonding between ethanol molecules is weakened with increasing DME composition in ethanol-rich region. In DME-rich region, on the other hand, dipolar orientation between DME molecules plays a dominant role of molecular orientation of DME + ethanol mixture.

Original languageEnglish
Pages (from-to)267-271
Number of pages5
JournalKagaku Kogaku Ronbunshu
Issue number4
Publication statusPublished - 2013


  • Dimethyl Ether
  • Dipolar Orientation between Molecules
  • Ethanol
  • Kirkwood g-factor
  • Static Dielectric Constant


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