Thermodynamic properties of n-alkoxyethanols+organic solvent mixtures: XIII. Application of the Flory theory to 2-methoxyethanol+n-alkoxyethanols systems

The Flory theory has been applied to the following binary mixtures: 2-methoxyethanol (2ME)+2-ethoxyethanol (2EE), or+2-butoxyethanol (2BE), and+2-(2-methoxyethoxy)ethanol(22MEE),+2-(2-ethoxyethoxy)ethanol (22EEE), or+2-(2-buthoxyethoxy)ethanol (22BEE). For pure compounds, the coefficients of thermal expansion α and isothermal compressibility KT were estimated in order to compute the Flory characteristic parameters, pressure pi∗ and volume vi∗. For each mixture, the energetic parameter χ12 was fitted to excess enthalpy data HE at 298.15 K and used to predict correctly the corresponding excess volume VE. The variation of χ12 versus the number of C atoms+–O– groups in alkoxyethanols is similar to that found previously for 1-alkanol+1-alkanol mixtures.