Volumetric and viscometric properties of aqueous solutions of some monoalkanolamines

Densities (rho) and viscosities (eta) of some aqueous solutions of methylethanolamine (MEA), ethylethanolamine (EEA), dimethylethanolamine (DMEA), 3-(dimethylamino)-1-propanol (DMAP-1) and 3-(Dimethylamino)-2-propanol (DMAP-2) were determined from 303.15 to 323.15 IC at different compositions in the range 0 <= x(1)<= 1, where x(1) is the mole fraction of alkanolamines. Excess molar volumes (V-m(E)) are negative for all systems in the whole range of composition at all temperatures with minima occurring at x(1) similar to 0.35 to 0.40. The depth of minima varies as, DMAP-2 + W > DMEA + W > DMAP-1 + W > EEA + W > MEA + W. The Delta eta values have been found to be positive for all systems in the whole range of composition at all temperatures with large maxima at "aqueous region. The heights of maxima for eta as well as Delta eta vary as EEA + W > DMAP-1 + W> MEA + W > DMEA + W> DMAP-2 + W. The mixture properties and their corresponding excess/deviation data have been fitted well with the polynomial equations with optimized order. (C) 2016 Elsevier B.V. All rights reserved.