Density, speed of sound, viscosity, refractive index and surface tension of N-methyl-2-pyrrolidone + diethanolamine (or triethanolamine) from T = (293.15 to 323.15) K

► Experimental data of different properties of mixtures of NMP + DEA (TEA) were measured. ► Different models have been used to fit experimental values with low standard deviations. ► Derived properties were calculated. ► Different equations have been used to fit experimental data. ► Surface thermodynamic data from surface tension have been also determined.