Measurement and relationships of density and viscosity of 1,2-propylene Check for glycol plus dimethyl sulfoxide mixtures and spectral insight

The density (rho) and viscosity (eta) of 1,2-propylene glycol (PPD) + dimethyl sulfoxide (DMSO) mixtures were measured at atmospheric pressure from (293.15 to 318.15) K. Based on experimental data, viscosity deviations, excess molar volumes values, partial molar volumes, apparent molar volumes and excessive Gibbs free energy were calculated by Redlich-Kister equation, Jouyban-Acree model, the least square method and other formulas. Meanwhile, FTIR, UV-Vis, and fluorescence spectroscopy were used to analyze the intermolecular interactions, which proved that the S=O had a destructive effect on the hydrogen bond between -OH and -OH in PPD, and the S=O also formed new hydrogen bond with -OH, which expressed as (CH3)(2)S=O center dot center dot center dot HOCH2CH(CH3) OH center dot center dot center dot O=S (CH3)(2). (C) 2018 Published by Elsevier B.V.