THE DIELECTRIC SPECTRA OF WATER-ETHANOL MIXTURES IN THE MICROWAVE REGION,

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Abstract:

The dielectric constant and loss were measured at 8.5, 3.0, 1.0, and 0.3 kMcsec for solutions of ethanol and water as a function of concentration and temperature. The mixtures exhibit a distribution of relaxation times as opposed to single time constants for the pure components. The distribution of time constants was resolved as the superposition of two dispersions, each having a single time constant. The intensity and time constant of the two dispersions were found as a function of temperature and concentration and explained in terms of a mechanism in which hydrogen bonds are broken and allowed to reorient. In addition, the dielectric constant and loss were measured for water from 5 to-5C, and no abnormal behavior was noted at 4C or in the supercooled state. Author

Author(s):
Buck, Douglas E.
Author Organization(s):
MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR INSULATION RESEARCH
Descriptive Note:
Technical rept.,
Annotation:
Dielectric spectra of water-ethanol mixtures in the microwave region.
Pagination:
0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-200
Contract/Grant Number(s):
AF33 616 8353, Nonr184110
Project Number(s):
NR018 801
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*DIELECTRICS, MICROWAVE SPECTROSCOPY), (*WATER, DIELECTRIC PROPERTIES), (*ALCOHOLS, DIELECTRIC PROPERTIES), (*MICROWAVE SPECTROSCOPY, DIELECTRICS), MIXTURES, RELAXATION TIME, MOLECULAR ASSOCIATION, SUPERCOOLING, ICE, DIPOLE MOMENTS
Report Date:
1965 Jun 01