Densities, refractive indices and excess properties of binary mixtures of dimethylsulphoxide with some poly(ethylene glycol)s at different temperatures

► This study reports densities and refractive indices of dimethylsulphoxide with poly(ethylene glycol) mixtures. ► Provides estimation of excess properties of dimethylsulphoxide with poly(ethylene glycol) mixtures ► The study elucidates interactions of dimethylsulphoxide with poly(ethylene glycol)s. ► Correlates physicochemical properties with interactions in these mixtures