Dielectric properties of ethyleneglycol-1,4-dioxane mixtures using TDR method.
In: The journal of physical chemistry. A, Jg. 111 (2007-04-26), Heft 16, S. 2993-8
academicJournal
Zugriff:
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.
| Titel: |
Dielectric properties of ethyleneglycol-1,4-dioxane mixtures using TDR method.
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| Autor/in / Beteiligte Person: | Sudo, S ; Oshiki, N ; Shinyashiki, N ; Yagihara, S ; Kumbharkhane, AC ; Mehrotra, SC |
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| Zeitschrift: | The journal of physical chemistry. A, Jg. 111 (2007-04-26), Heft 16, S. 2993-8 |
| Veröffentlichung: | Washington, D.C. : American Chemical Society, c1997-, 2007 |
| Medientyp: | academicJournal |
| ISSN: | 1089-5639 (print) |
| DOI: | 10.1021/jp068222s |
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