EXCESS VOLUME OF MIXTURES OF OXAALKANES AND BRANCHED ALKANES

Equimolar values of the excess volume, V-E, have been obtained at 25 d egrees C for a series of oxaalkanes, 2,5-dioxahexane, 2,5,8-trioxanona ne, 2,5,8,11 -tetraoxadodecane, and 2,5,8,11,14-pentaoxapentadecane, m ixed with a series of highly-branched alkanes: 1,7-dimethylbutane, 2,2 ,4-trimethylpentane, 2,2,4,6,6-pentamethylheptane, and 2,2,4,4,6,8,8-h eptamethylnonane. The Prigogine-Flory thermodynamic theory predicts th e large variations of V-E with the chain-lengths of the molecules in t he two series.