Shear viscosities of the N-methylformamide- and N,N-dimethylformamide-(C-1-C-10) alkan-1-ol solvent systems

Abstract

Viscosities of some N-methylformamide- and N,N-dimethylformamide-(C-1-C-10) alkan-1-ol binary mixtures have been measured at 298.15 K over the whole composition range. The excess viscosities and excess Gibbs energies of activation for viscous flow, compared with values for other amide-alcohol mixed solvents, suggest that the alcohol size does not play a significant role in the mixture behaviour. The alcohol mixtures with aliphatic amides gave heteroaggregates to a greater extent, the lower the self-association of the pure amides. An analysis in terms of solvent solubility parameters gave good agreement with experimental results.