Densities, Viscosities, and Refractive Indices for Binary and Ternary Mixtures of Ethanol, 2-Methylpropan-2-ol, and 2,2,4-Trimethylpentane

Abstract

Densities, viscosities, and refractive indices of the ternary system ethanol + 2-methylpropan-2-ol + 2,2,4trimethylpentane at T ) 298.15 K and the binary systems ethanol + 2-methylpropan-2-ol, ethanol + 2,2,4-trimethylpentane, and 2-methylpropan-2-ol + 2,2,4-trimethylpentane were measured at T ) (298. 15, 308.15, and 318.15) K and atmospheric pressure over the whole composition range. Densities were determined using a vibrating-tube densimeter. Viscosities were measured with an automatic microviscometer based on the rolling ball principle. Refractive indices were measured using a digital Abbe-type refractometer. Excess molar volumes (V E ), deviations in the viscosity (∆η) from the mole fraction average, and deviations in the refractive index (∆n D ) from the volume fraction average for the mixtures were derived from experimental data. The binary and ternary data of V E , ∆η, and ∆n D were correlated as a function of the mole fraction by using the Redlich-Kister and the Cibulka equations.

Densities, Viscosities, Refractive Indexes, and Surface Tensions for Mixtures of Ethanol, Benzyl Acetate, and Benzyl Alcohol

“…5−18 Apparatus and Procedure. The detailed experimental procedure and calibration have been described in our earlier papers, 16,19 so only a brief description of the measurement is presented here. Densities ρ were measured with an Anton Paar DMA-5000 vibrating-tube densimeter (Anton-Paar, Graz, Austria) with an uncertainty of ± 8•10 −5 g•cm −3 .…”

Densities, Viscosities, and Correlations for the Ternary System of Ethanol + Methylbenzene + 2-Methyl-2-propanol and Its Binary Subsystems at T = 298.15 and 318.15 K

“…In the past, referring to the ThermoLit of NIST, 8 the densities were measured by Ogiwara et al 9 and Gonzalez-Olmos et al 10 at T = 298.15 K and Moravkova et al 11 at T = 318.15 K for ethanol + methylbenzene. The experimental densities and viscosities at T = 298.15 and 318.15 K were reported by Wang et al 12 for ethanol + 2-methyl-2-propanol. At T = 298.15 K, Atik 13 and Kwak et al 14 have investigated the densities for ethanol + methylbenzene; in addition, Penã et al 15 carried out the same determination for methylbenzene + 2-methyl-2-propanol.…”

“…The densities were measured with a relative standard uncertainty of 0.001. The maximum error in excess molar volume resulting from the propagation of errors, considering the uncertainty in the density measurement, the uncertainty of the composition in mole fraction, and the possible error with 3 × 10 –3 cm 3 /mol referring to the measurement of volume changing of mixing (ref ), was 0.003 cm 3 ·mol –1 . Viscosities were determined with an Anton Paar microviscometer (type AMVn).…”

Viscosity of oxygenated fuel: A model based on Eyring’s absolute rate theory

“…Such difference may be attributed to the different performance of these mixtures viscosities, which is mainly caused by the influence of hydrogen bonds between molecules. However, the viscosities of TBA + MeOH have positive deviations from ideal values, which may result from the hydrogen bond effect between two molecules [72] and result in a positive value of κ.…”