ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Dielectric relaxation of butyl acrylate—alcohol mixtures using time domain reflectometry
K. Dharmalingam, K. Ramachandran, P. Sivagurunathan, B. Prabhakar Undre, P. W. Khirade, and S. C. Mehrotra
Department of Physics, Annamalai University, Annamalai Nagar, 608 002, Tamilnadu, India
Received: 30 June 2006 Revised: 6 August 2006 Accepted: 7 September 2006
Abstract: Dielectric relaxation measurements of butyl acrylate—alcohol mixtures at different concentrations and temperatures within the frequency range of 10 MHz to 10 GHz have been carried out using time domain reflectometry. Parameters such as the static permittivity, dielectric relaxation time, the Kirkwood correlation factor, the excess inverse relaxation time, and thermodynamic functions were determined and discussed to yield information on the molecular structure and dynamics of the mixture. The value of the dielectric properties decreases with increasing butyl acrylate concentration in alcohol and systematically varies with the length of alcohol alkyl chain. Negative values of the excess inverse relaxation time found for all concentrations and at all temperatures studied may indicate that the effective dipoles rotate slowly.
Keywords: dielectric relaxation properties - time domain reflectometry - liquid—liquid mixtures - thermodynamic functions
Full paper is available at www.springerlink.com.
Chemical Papers 61 (4) 300–307 (2007)
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