DIELECTRIC-RELAXATION OF WATER ALCOHOL AND ALCOHOL ALCOHOL-SOLUTIONS

A few results of a systematic study of the dielectric properties of water-alcohol and alcohol-alcohol solutions in the whole concentration range are reported. The relaxation processes have been measured up to 10 GHz by time domain reflectometry over the temperature range from -37 to +25-degrees-C. From the analysis of the experimental dielectric spectra, the static dielectric constant, epsilon-0, and the characteristic time, tau-I, of the principal relaxation band as functions of temperature and concentration have been obtained. The data are discussed in terms of the strength and the associating effect of the hydrogen bond. A model, based on the hydrogen bond dynamics, originally introduced to study the dielectric relaxation of pure liquids, is tentatively extended to binary solutions.