Dielectric relaxation of Tripropylene glycol–water mixture using time domain reflectometry

ABSTRACT

The complex permittivity spectra of tripropylene glycol and water solutions have been obtained by time domain reflectometry (TDR) technique in the frequency range from 10 MHz to 30 GHz and the temperature range 20°C–05°C. The dielectric relaxation parameters such as static dielectric constant and relaxation time were obtained by using the non-linear least square fit method. The intermolecular hydrogen bonding of tripropylene glycol–water has been discussed using the Kirkwood correlation factor and thermodynamic parameters. The activation energy decreases with increase in water content in the mixture as expected in the Arrhenius behaviour. The dielectric constant for mixtures has been fitted to the Bruggeman mixture formula in the non-linear case.

KEYWORDS:

• Dielectric relaxation
• time domain reflectometry
• glycol

Acknowledgements

The financial support from the Department of Science and Technology, New Delhi, is gratefully acknowledged (Project No. SR/S2/LOP-25/2007). The author P A Chalikwar is thankful to the University Grant Commission (UGC) WRO Pune (File NO. 47-718/13(WRO)). We thank Prof S.C. Mehrotra, Department of Computer Science, Dr B.A.M. University, Aurangabad, for fruitful discussion.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Department of Science and Technology, New Delhi [Project No. SR/S2/LOP-25/2007].