Dielectric relaxation of binary mixtures of diethylene triamine propane diol in 1,4-dioxane using microwave techniques

The dielectric constant (epsilon')and dielectric loss (epsilon") for dilute solutions of diethylene triamine (DETA) + propane diole (PD) in 1,4-dioxane have been measured at 10.7 GHz and temperatures 22, 30, 40 and 50 degrees C, by using standard microwave techniques. Following the single frequency concentration variational method, the dielectric relaxation time (T), thermodynamic properties (Delta F, Delta H and AS) and dipole moment (mu) at various temperatures have been calculated. Comparison has been made with corresponding energy parameters for viscous flow. It is found that dielectric relaxation process call be treated as rate process just like the viscous flow process. The variation relaxation time and excess inverse relaxation time with mole fraction of DETA in mixtures confirm the solute-solute and solute-solvent interactions.