title: Dielectric properties of ethyleneglycol-1,4-dioxane mixtures using TDR method.
abstract: Complex permittivity has been determined for mixtures of ethyleneglycol-1,4-dioxane (EG-DX) with various concentrations in the frequency range from 100 MHz to 30 GHz at 25 degrees C by time domain reflectometry (TDR). A primary process with an asymmetric shape and a Debye-type small-amplitude high-frequency process are observed for each mixture. The deviation of the relaxation time for the primary process from that of the ideal mixture shows a maximum value at a mole fraction of 1,4-dioxane, xDX approximately =0.8. The static permittivity for the mixtures can be explained using the Luzar model by assuming the formation of two types of hydrogen-bonded dimers, one between EG-EG (pair 1) and the other between EG-DX (pair 2). The number of these pairs is also estimated as a function of concentration. These results of the relaxation time and static permittivity are interpreted on the basis of a model of two kinds of cooperative domains coexisting in the mixtures.
authors.affiliation: Department of Physics, Tokai University, Kanagawa 259-1292, Japan.
authors.forename: Seiichi
authors.initials: S
authors.lastname: Sudo
authors.forename: Noriaki
authors.initials: N
authors.lastname: Oshiki
authors.forename: Naoki
authors.initials: N
authors.lastname: Shinyashiki
authors.forename: Shin
authors.initials: S
authors.lastname: Yagihara
authors.forename: Ashok C
authors.initials: AC
authors.lastname: Kumbharkhane
authors.forename: Suresh C
authors.initials: SC
authors.lastname: Mehrotra