Applicability of extended hydrodynamical model to dielectric relaxation in simple polar liquids.

Abstract

Dielectric relaxation profiles and self-diffusion coefficients were measured for 1,1,1-trichloroethane, t-butyl chloride, and 2,2-dinitropropane in liquid and plastic phases. For all threee samples no significant change in the relaxational behavior is observed when going from liquid to plastic-crystal phases. The comparison of the results with the extended hydrodynamic model shows that the model overestimates the effect of translational-rotational coupling on dielectric properties of liquids.