Viscosity of the systemsm-xylene, +1-propanol, +2-propanol, +1-butanol, +t-butanol

Abstract

Viscosities, , of the systems, m-xylene, þ1-propanol, þ2-propanol, þ1-butanol and þt-butanol have been measured for the whole range of composition at 303.15, 308.15, 313.15, 318.15 and 323.15 K. The variation of viscosities has been plotted against mole fraction of alkanols. Viscosities have been found to increase slowly up to a considerable concentration of alkanols, followed by a rapid rise of viscosities at higher concentrations. The slow rise of viscosity is attributed to dissociation of alkanols in m-xylene, while the rapid rise of viscosity is ascribed to self-association of alkanols. Excess viscosities, E , have been plotted as a function of mole fraction of alkanols. The curves show negative values for the whole range of composition, with minima occurring in alkanol-rich region. and E have been fitted to appropriate polynomial equations. The study shows the effect of branching and chain length of alkanols on and E .

Density and Viscosity of the Binary Mixtures of Hexan-1-ol with Isomeric Xylenes at T = (308.15 and 318.15) K and Atmospheric Pressure

“…Therefore, it may be predicted from the comparative profile that the greater the interaction the lesser is the depth of the minima of the negative viscosity deviations. Saleh et al proposed the same argument to explain the viscometric behavior of the systems containing different alkanols other than hexan-1-ol and m -xylene.…”

“…In the literature, there are reports on the volumetric and viscometric behavior of xylenes with different alkanols − other than hexan-1-ol. Excess molar volumes of hexan-1-ol + xylenes at 298.15 K was reported by Rodriguez-Nuñez et al Das et al and Habibullah et al reported the excess and deviation properties of the hexan-1-ol + m -xylene and + p -xylene systems, respectively, at T = (303.15, 313.15, and 323.15) K. However, no experimental data are available at the comparable conditions for hexan-1-ol with o -xylene, m -xylene, or p -xylene at T = (308.15 and 318.15) K.…”

Densities and Dynamic Viscosities of Alicyclic Cyclohexane with Toluene, o-Xylene, and Mesitylene at T = (303.15 to 323.15) K and Atmospheric Pressure

“…Moreover, it may be predicted from the comparative study that the higher the temperature, the greater the molecular interaction and thereby the lesser the depth of minima of Δη (i.e., d(Δη)/dT is positive). Habibullah et al, 4 Baragi and Aralaguppi, 23 Yang et al, 28 and Saleh et al 60 proposed a similar argument for viscosity deviation of aliphatic/alicyclic hydrocarbon + aromatic hydrocarbon systems.…”

Study of Molecular Interactions in Binary Mixtures at Various Temperatures Containing 2,6-Dimethylcyclohexanone and Aliphatic Primary Alcohols: Thermodynamics and FT-IR Spectroscopic Studies

“…The purity of the solvents was assessed by comparing the experimental density, speed of sound, and viscosity with available literature values ,− at different temperatures; see Table . However, the excess volume ( V E ) was calculated from the following relation: V normalE = ∑ i = 1 n x i M i ρ m − prefix∑ i = 1 n x i M i ρ i Here, ρ represents the density of the mixture; M i­ and ρ i are the molar mass and density of component i , and x i is its mole fraction.…”

“…All chemicals were used without further purification. The 23 1192 21 1.7309 18 0.7961 19 1189 15 1.705 20 0.79540 20 1189 16 1.720 23 1158 21 1.372 20 0.78720 21 1.390 14 0.7873 14 1.376 19 0.7871 18 1.380 18 0.78710 20 a The standard uncertainties are u(x) = 0.0008, u(ρ) = 0.0009 g cm −3 , u(u) = 4.1 m s −1 , u(η) = 0.018 mPa s; u(T) = 0.01 K for density, speed of sound, and viscosity; and u(P) = 1 kPa. 2,6-Dimethylcyclohexanone (mixture of cis/trans stereoisomers) contains % ratio of 81:19 cis/trans compositions with relative standard uncertainty of 0.20. information about source, final purity, analysis method, and water content is given in Table 1.…”