DIELECTRIC-RELAXATION OF WATER ALCOHOL AND ALCOHOL ALCOHOL-SOLUTIONS

被引:16
作者
BERTOLINI, D
CASSETTARI, M
SALVETTI, G
TOMBARI, E
VERONESI, S
机构
[1] Istituto di Fisica Atomica e Molecolare, CNR, 76127 Pisa
关键词
D O I
10.1016/0022-3093(91)90748-U
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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.
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页码:1169 / 1173
页数:5
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