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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 22, Number 4
BKCSDE 22(4)
April 20, 2001 

 
Title
Static Dielectric Constant and Relaxation Time for the Binary Mixture of Water, Ethanol, N,N-Dimethylformamide, Dimethylsulphoxide, and N,N-Dimethylacetamide with 2-Methoxyethanol
Author
Ajay Chaudhari, N. M. More, S. C. Mehrotra
Keywords
Dielectric relaxation, Time domain reflectometry, Kirkwood factor, Excess parameters.
Abstract
Frequency spectra of the complex permittivity of 2-methoxyethanol (2-ME) with water, ethanol, dimethylsulphoxide (DMSO), N,N-dimethylformamide (DMF) and N,N-dimethylacatamide (DMA) have been determined over the frequency range of 10 MHz to 20 GHz at 25 ℃, using the Time domain reflectometry method, for 11 concentrations for each system. The static dielectric constant, dielectric constant at microwave frequency, relaxation time, excess dielectric parameters, and Kirkwood correlation factor have been determined. The relaxation in these systems within the frequency range can be described by a single relaxation time constant, using the Debye model. The parameters show a systematic change with the concentration.
Page
257 - 361
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