Electric permittivity in the one- and two-phase region of 1-nitropropane-hexadecane near-critical solution Original Research Article

Results of dielectric constant measurements in a one- and two-phase region of near-critical 1-nitropropane-hexadecane solution are presented. For the critical anomaly in the homogeneous region the critical exponent 1 − α = 0.87 ± 0.03 was found. The influence of the correction-to-scaling has been discussed. Below Tc, the analysis of the binodale gave 1 − α = 0.88 ± 0.12 for the diameter and ß = 0.328 ± 0.06 for the order parameter, neglecting the influence of the correction-to-scaling in the tested temperature range T − Tc ≈ 5 K. All above values are in very good agreement with theoretical predictions. For the pretransitional anomaly in the homogeneous region the analysis of the low-frequency Maxwell-Wagner dispersion effect gave the critical exponent x = 0.41 ± 0.02, a bit higher than the theoretically predicted value x ≈ 0.3.