Excess enthalpies of (methyl 1,1-dimethylpropyl ether + an n-alkane) at the temperature 298.15 K

Excess enthalpies of (methyl 1,1-dimethylpropyl ether + 2,3-dimethylbutane or cyclohexane + decane) at the temperature 298.15 K

“…(8,9) The H E m, 1+23 results for the mixtures containing CH 3 CH(CH 3 )CH(CH 3 )CH 3 in figure 1 are nearly symmetric about x 1 =0.5, and fall between the curves for x 2 =0 and (x 1 +x 2 )=1. H this unusual variation, the characteristics of the present results in figures 1 and 2 are qualitatively similar to those found previously (10) for the analogous mixtures containing methyl 1,1-dimethylethyl ether (methyl tert-butyl ether) in place of methyl 1,1-dimethylpropyl ether.…”

“…The values of the interchange-energy parameters X 12 for {xCH 3 OC(CH 3 ) 2 CH 3 + (1−x)CH 3 CH(CH 3 )CH(CH 3 )CH 3 } and {xCH 3 OC(CH 3 ) 2 CH 3 + (1−x)c-(CH 2 ) 6 } were obtained by fitting the Flory formula for H E m to the smooth representations of the experimental results for those mixtures. (8) The values of X 13 and X 23 were the same as reported by Zhu et al (9,10) The dashed curves for H …”

“…The values of the characteristic pressures p*, molar volumes V* m , and temperatures T* were taken from our previous publications. (9,(17)(18)(19) In estimating the ratios s ij of molecular surface areas of contact per segment for components i and j, the spherical approximation was again assumed for the shapes of the molecules. The values of the interchange-energy parameters X 12 for {xCH 3 OC(CH 3 ) 2 CH 3 + (1−x)CH 3 CH(CH 3 )CH(CH 3 )CH 3 } and {xCH 3 OC(CH 3 ) 2 CH 3 + (1−x)c-(CH 2 ) 6 } were obtained by fitting the Flory formula for H E m to the smooth representations of the experimental results for those mixtures.…”

Excess enthalpies of (methyl 1,1-dimethylpropyl ether + hexane + decane or dodecane) at the temperature 298.15 K

“…Since the treatment follows our previous work (12) closely, the equations are not repeated here. Values of the characteristic pressures p*, molar volumes V* m , and temperatures T* were the same as used by Zhu et al (1) in the calculations for (methyl 1,1-dimethylpropyl ether + n-alkane) binary mixtures. In estimating the ratios s ij of molecular surface areas of contact per segment for components i and j, the spherical approximation was again assumed for the shape of the molecules.…”

“…Recent papers (1)(2)(3) from our laboratory have described measurements of the excess enthalpies for binary mixtures of methyl 1,1-dimethylpropyl ether (''tert-amyl methyl ether'') with some normal, cyclic, and branched hydrocarbons. The thermodynamic properties of (the ether + a hydrocarbon) are of interest, in view of the current use of the ether as an oxygenating agent in gasoline technology.…”