ABSTRACT
The values of density (ρ), viscosity (η) and speed of sound (u) were measured for binary mixtures of 3-methyl-1-butanol (isoamyl alcohol) with n-butylamine (NBA), sec-butylamine (SBA), tert-butylamine (TBA), n-hexylamine (NHA) and n-octyl amine (NOA) over the entire range of mole fractions and at three temperatures (298.15, 303.15 and 308.15 K). From these measurements, the values of excess molar volume(VE), viscosity deviation (∆η), deviation in isentropic compressibility (∆ks), excess Gibbs free energy of activation of viscous flow (G*E) and Grungberg–Nissan interaction parameter (d′) have been calculated. The excess parameter deviations are fitted to Redlich–Kister-type polynomial equation using multi-parametric nonlinear regression analysis to estimate the binary coefficients and standard deviations. The results were discussed in terms of molecular interactions, dipole–dipole interactions and H-bond interactions between unlike molecules. Further, the effects of temperature and amine group in different amines were also studied for the binary mixtures.
Acknowledgments
The authors are thankful to University Grants Commission (UGC), Government of India, for financial support in the form of UGC-JRF.
Disclosure statement
No potential conflict of interest was reported by the authors.