Viscous flow in aqueous solution of quaternary ammonium salts: high concentration range

Abstract

By introducing the condition that the viscosity of solutions η → η 0, the viscosity of the solvent as the concentration of the salt N → 0, we have recast Angell's equation in the following form, ln η rel = kN/[ N o( N o  N)]. This equation has been found to represent satisfactorily the viscosity behaviour of quaternary ammonium halides in aqueous solution up to high concentration and the values of N 0, the hypothetical concentration at which the solution becomes a glass, agree with those obtained from Angell's equation. The relationship with Vand's equation of fluidity is also discussed.