Thermodynamic parameters of hexylene glycol with isomeric butanols at various temperatures

ABSTRACT

Excess molar volume, excess isentropic compressibility, deviation in viscosity and excess Gibbs free energy of activation of viscous flow for binary mixtures of Hexylene glycol (2-methyl-2,4-pentanediol- or MPD) with 1-butanol (J₁), 2-butanol (J₂) and 2-methyl-2-propanol (J₃) components selected compositions were determined from the measured values of densities (ρ), viscosities ($\mathit{\eta }$), and speeds of sound (u) of pure components and their mixtures from 303.15 K to 313.15 K. The results are analysed in terms of intermolecular interactions or hydrogen bonding or hetero-association interactions in the binary mixtures. Finally, the Prigogine-Flory-Patterson (PFP) Theory is applied to identify the most predominant molecular interaction. Using Jouyban–Acree model, results are discussed in terms of mean relative deviation (MRDs) and individual relative deviation (IRD) between calculated and experimental densities, speeds of sound and viscosities as an accuracy criterion.

KEYWORDS:

• MPD
• isomeric butanols
• PFP theory
• Jouyban-Acree model

Disclosure statement

No potential conflict of interest was reported by the author(s).