Effect of temperature and composition on the density, refractive index, and excess quantities of binary mixtures of 2,4,6,8-tetramethyl-2,4,6,8-tetraethenylcyclotetrasiloxane with aromatic hydrocarbons

Thermodynamic characterization of binary mixtures of poly(propylene glycol) 425 with toluene and o-, m- and p-xylenes

“…However, to the best of our knowledge this should not affect the calculated deviations in viscosity or in refractive indices of these compounds, since the impact of water cancels in the calculations. [26]; () [27]; () [28]; () [29]; () [30]; () [31]; () [32]; () [33]; () [34]; (c) m-xylene: () exp; () [27]; () [35]; () [33]; () [30]; () [26]; () [36]; () [37]; () [38]; () [39]; (d) p-xylene: () exp; () [26]; () [36]; () [30]; () [31]; () [32]; () [40]; () [41]; () [42]; (e) PPG425: () exp;…”

Viscosity, Gibbs Free Energy, and Refractive Indices for Binary Mixtures of o-Cresol + Poly(ethylene glycols) at T = 288.15–308.15 K and 96.5 kPa

“…Entropy of Activation (ΔS*/J K −1 mol −1 ) and Enthalpy (ΔH*/kJ mol −1 ) of Activation for the Viscous Flow for o-Cresol(1) + PEGs(2) T/K = 308.15 indicates weak interactions between the components of the mixture, whereas positive deviation in Δ ϕ n D values is considered to be due to the presence of significant interactions in the mixtures. 42 The composition dependence of Δ ϕ n D can be expressed by Redlich−Kister equation (eq 3) where y is Δ ϕ n D . The coefficients A i and corresponding standard deviations (σ) are listed in Table 9.…”

Volumetric and Refractive Properties of the Mixtures of 1,1,3,3-Tetramethyl-1,3-diphenyldisiloxane with Various Organosilicon Compounds at T = (308.15 to 328.15) K

“…At the same temperature, the R m of these four solutions decreases with the solvent in the following order: D 4 Vi > D 3 F > D 4 > DETMDS. Our previous research showed that the molar refractions are largely determined by the atoms and bonds present in the molecule or mixture …”

“…This paper is a continuation of our previous work related to the study of thermodynamic and optical properties of binary mixtures of organosilicon compounds and aromatic hydrocarbons. − The information about these properties and their dependence on composition and temperature are very important fundamental data for the design of a chemical engineering process. In an attempt to explore the nature of interactions occurring between the mixing components, the densities and the refractive index for the binary mixtures of TMDPDS with D 4 , D 4 Vi , D 3 F and DETMDS at different temperatures ( T = 308.15, 313.15, 318.15, 323.15, and 328.15 K) and atmospheric pressure were measured.…”

“…Our previous research showed that the molar refractions are largely determined by the atoms and bonds present in the molecule or mixture. 4 The deviation in the molar refraction (ΔR m ) could also be represented by the Redlich−Kister equation (eq 2). The parameters were obtained by the least-square fit method, and the results are shown in Table 7, together with the standard deviations σ calculated using eq 3.…”