کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9588516 | 1506642 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature-dependent dielectric relaxation study of chlorobenzene with n-methylformamide from 10 MHz to 20 GHz
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The complex permittivity spectra of chlorobenzene with n-methylformamide were determined in the frequency range of 10 MHz to 20 GHz using time domain reflectometry (TDR) in the temperature range 15 °C to 45 °C for 11 different concentrations of the system. The dielectric parameters viz. static dielectric constant (ε0) and relaxation time (Ï) have been obtained by the least squares fit method. Excess properties and Kirkwood correlation factor of the mixtures have been determined. For the temperature range, considered here, the permittivity and relaxation time increased with the percentage of n-methylformamide. The excess permittivity is found to be negative in the chlorobenzene-rich region and positive in the n-methylformamide-rich region. However the excess inverse relaxation time has the reverse trend. The static dielectric constants for the mixtures have been fitted with the modified Bruggeman model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 121, Issues 2â3, 15 September 2005, Pages 88-93
Journal: Journal of Molecular Liquids - Volume 121, Issues 2â3, 15 September 2005, Pages 88-93
نویسندگان
V.P. Pawar, A.R. Patil, S.C. Mehrotra,