Densities and viscosities of binary mixtures of{dimethylsulfoxide+aliphatic lower alkanols(C1-C3)}at temperatures from T=303.15 K to T=323.15 K

摘要

Densities and viscosities for dimethylsulfoxide(DMSO)with methanol,ethanol,1-propanol,and 2-propanol have been measured as a function of mole fraction at T=(303.15,308.15,313.15,318.15,and 323.15)K and atmospheric pressure.From the measurements,excess molar volumes(V_m~E),excess viscosities(eta~E),and Grunberg and Nissan interaction parameters(s)have been calculated.The excess parameters are fitted to a Redlich-Kister equation.Excess molar volumes(V_m~E)are negative for(DMSO+methanol,+ethanol)systems throughout the whole range of composition.The(DMSO+1-propanol)system shows both positive and negative excess molar volumes and(DMSO+2-propanol)shows positive excess molar volume,hardly any negative value is observed in alcohol rich-region.The excess viscosities and interaction parameters of all the mixtures are negative except for the(DMSO+methanol)system which is positive.