Étude thermodynamique des mélanges binaires

Excess volumes and excess viscosities of binary mixtures of 1-bromo-2-methylpropane + an isomer of butanol at 298.15 and 313.15 K

“…With respect to the viscosity, we must emphasize that the values of r/E are strongly negative as was expected according to Fort and Moore [ 12] or Meyer et al [13] and Nigam et al [14] for G *E. All these authors have stated that negative values in the mentioned properties are characteristic for systems in which dispersive forces like the rupture of the self-association in alkanols are prevailing. Pure butanols have high viscosities and the addition of the other component brings about the breaking of their structure, giving rise to a minor degree of association that facilitates the flow of the mixture, so a noticeable decrease in viscosity occurs and, consequently, the excess flow properties present negative values, the most negative being those corresponding to the mixtures with 2-methyl-2-propanol, while the mixtures with 1-butanol show the least negative ones.…”

Viscosity of (ethane-1,2-diol + 1,2-dimethoxyethane + water) at temperatures from 263.15 K to 353.15 K

“…An examination of figure 4 reveals that G * E is always positive for the two aqueous binary subsystems, while the opposite holds for {ED (1) + DME (2)} under all experimental conditions. According to the literature (30,31) excess molar properties such as G * E can be taken as reliable criteria for checking the possible presence of specific intermolecular interactions between different species. From figure 4, it is clear that the magnitude of the G * E properties follows, in general, the sequence (DME + W) > (ED + W) > (ED + DME).…”

Thermophysical properties of binary mixtures of odichlorobenzene and o-chlorophenol with diethyl ether, tetrahydrofuran, cyclohexane and anisole

“…The negative values of V E may be attributed to change of free volumes in the real mixture because of interstitial accommodation of DEE molecules into clusters of OCP molecules. between component molecules [32,33]. Regression result for the V E and ,D of binary liquids at various temperatures along with correlation coefficient (R 2 ) are illustrated in Table 3.…”