Dielectric behaviour of propylene glycol-water mixtures studied by time domain reflectometry

Dielectric properties of water in amorphous mixtures of polymers and other glass forming materials

“…The dielectric behavior of aqueous solutions has been extensively studied in the past at relatively high temperature range ($25°C) showing the existence of only one dielectric relaxation process (symmetric or asymmetric depending on the involved system) [1][2][3]. However, in the low temperature range (150-200 K) aqueous solutions usually show two relaxation processes in the liquid-rich side (water concentrations in the range 30-50%) as in the case of ethylene-glycol water mixtures [4].…”

Chemical speciation of 2,3-dihydroxybenzoic acid complexes with some biologically essential metal ions in 1, 2-propanediol–water mixtures

“…Variations in the relative strengths of acids and bases with changing solvents should be a function of charge, the radius of the ion and the dielectric constants of the medium (Thaku et al, 2012). The dielectric constants of PG at different percentages (0.0-60.0% v/v) of water were taken from literature (Sengwa et al, 2001). PG is an amphiprotic and coordinating solvent.…”

Dielectric constant and molecular association in binary mixtures of N,N-dimethylethanolamine with alcohols and amides

“…The H-bonded interactions between the mixture constituents results the change in dipolar ordering and is responsible for deviation in the dielectric constant of the mixed solvents from the ideal behaviour, which requires experimentally derived dielectric constant values for selection of suitable composition and modeling of supramolecular ordering of the mixed solvents [13,14]. In recent years, authors [15][16][17][18][19][20][21] have extensively investigated the dielectric constant of mixed solvents over the entire concentration range for their molecular conformation and also to characterize the ideal and non-ideal mixing behaviour of various polar solvents.…”