Volumetric properties of (n-alkanol plus polyether) systems at 298.15 K

Excess solar volumes V-E for binary liquid mixtures of (n-alkanol + 2,5-dio xahexane, 2,5,8-trioxanonane, 2,5,8,11-tetraoxadodecane, 3,6,9-trioxaundeca ne, or 5,8,11-trioxapentadecane) have been measured as a function of compos itions using a continuous dilution dilatometer at 298.15 K and atmospheric pressure over the full range of compositions. The n-alkanols were methanol, ethanol, 1-butanol, and 1-pentanol. The results have been used to estimate the excess partial molar volumes of the components. The V-E for each of th e mixture studied are negative with the exception of 1-pentanol + 2,5,8-tri oxanonane or 2,5,8,11-tetraoxadodecane and change sign for 1-butanol + 2,5- dioxahexane over the whole composition range. For each case, the V-E increa ses as the chain length of the iz-alkanol increases. (C) 1999 Elsevier Scie nce B.V. All rights reserved.