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| Article Name : | | | STRUCTURE DETERMINATION OF GLYCEROL –DIMETHYL FORMAMIDE BINARY MIXTURE USING TIME-DOMAIN REFLECTOMETRY AT 288, 298, 308 AND 318K. | | Author Name : | | | Patil H. T. , Shivalkar K.N. | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | GRT-6159 | | Article URL : | |  | Author Profile View PDF In browser | | Abstract : | | | The dielectric relaxation measurement on binary mixture of glycerol with Dimethyl formamide have been carried out for 11different concentration at 288,298,308& 318 K suing the picoseconds’ time domain reflectometry (TDR) over the frequency range 10 MHz to 20 GHz. The mixture exhibit a principle dispersion of Debye relaxation model at microwave frequencies. Bilinear calibration method is used to obtain complex permittivity ε*(ω) from complex reflection coefficient ρ*(ω) over the frequency range of 10 MHz to10 GHz, from complex permittivity Dielectric parameters were obtained by fitting in non linear least square fit method to the haverliak-nigami expression. The excess permittivity (εE) has negative value through a system indicates glycerol and Dimethyl formamide interact such that total effective dipoles reduces and form multimers. Excess relaxation time (1/τ) E has negative value through a system indicates glycerol and Dimethyl formamide interaction produces a field such that the effective dipoles rotate slowly. Kirkwood correlation factor (geff) has decreasing trend from pure liquid to mixture indicates dipoles are alien antiparallel which does not cooperate the field. | | Keywords : | | |
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