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- W4236035777 abstract "Excess molar volumes VmE at 298.15 K and atmospheric pressure for methanol and ethanol + 2,5-dioxahexane, + 3,6-dioxaoctane, + 2,5,8-trioxanonane, + 3,6,9-trioxaundecane, + 5,8,11-trioxapentadecane, + 2,5,8,11-tetraoxadodecane, and + 2,5,8,11,14-pentaoxapentadecane have been obtained from densities measured with an Anton-Paar DMA 602 vibrating-tube densimeter. All the excess volumes are negative over the whole mole fraction range.The VmE curves are shifted to the region rich in the alkanol, increasing their asymmetry with the number of oxygen groups in the polyethers. Results seem to remark the predominant contribution of free volume effects on interactional effects, particularly when the ethers are of the type CH3-(O-CH2CH2)m-CH3. In the case of polyethers with longer n-alkyl chain ends, self-association of methanol and ethanol is more relevant. A short comparative study with results for mixtures with higher 1-alkanols and polyethers is also presented.Key words: experimental, excess volumes, 1-alkanols, polyethers, self-association, free volume effects." @default.
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- W4236035777 date "1999-01-01" @default.
- W4236035777 modified "2023-09-30" @default.
- W4236035777 title "Excess molar volumes of methanol or ethanol + <i>n</i>-polyethers at 298.15 K" @default.
- W4236035777 doi "https://doi.org/10.1139/cjc-77-10-1608" @default.
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