Studies on Siloxanes. I. The Specific Volume and Viscosity in Relation to Temperature and Constitution

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

“…The Lennard-Jones parameters are from Maczek and Edwards (Maczek & Edwards, 1979) and are based on fitting their gas-phase viscosity measurements. Several experimental data sets in the liquid phase were located (Abbas, Ihmels, Enders, & Gmehling, 2011;Hurd, 1946;Wilcock, 1946) and fit to provide the viscosity coefficients in Table 2 with nitrogen as a reference fluid. The data of Abbas et al (Abbas et al, 2011) are considered the most reliable; the average absolute percentage deviation for this set is 0.9 %, and the authors claim an experimental uncertainty of 1 %.…”

“…The method of Chung et al (Chung et al, 1988) was used to estimate the Lennard-Jones parameters, as this gave better agreement with the gas-phase data of Maczek and Edwards (Maczek & Edwards, 1979) than the parameters provided in that work. For the liquid phase, three sets of data are available (Abbas et al, 2011;Hurd, 1946;Wilcock, 1946), of which the data of Abbas et al (Abbas et al, 2011) are the most extensive although all points are limited to atmospheric pressure. The coefficients resulting from fitting the liquid-phase viscosity data are in Table 2, and deviations with all data are plotted in Figure 83.…”

“…We were unable to locate gas-phase viscosity data. For the liquid phase, three sets of data are available (Abbas et al, 2011;Hurd, 1946;Wilcock, 1946), of which the data of Abbas et al (Abbas et al, 2011) are the most extensive although all points are limited to atmospheric pressure. The coefficients resulting from fitting the liquid-phase viscosity data are in Table 2 and deviations are plotted in Figure 86.…”

“…The method of Chung et al (Chung et al, 1988) was used to estimate the Lennard-Jones parameters. Experimental data are very limited for this siloxane; there are only 5 liquid viscosity points (Hurd, 1946;Wilcock, 1946), all at atmospheric pressure covering a limited temperature range, 298 K to 372 K. These data were fit to provide the coefficients in Table 2, and Figure 91 shows a deviation plot. The uncertainty of the liquid phase at atmospheric pressure is estimated to be 3 %, rising to 10 % at pressures to 10 MPa.…”

“…The method of Chung et al (Chung et al, 1988) was used to estimate the Lennard-Jones parameters. Several sets (Abbas et al, 2011;Hurd, 1946;Marsh, 1968;Palczewska-Tulinska & Oracz, 2005;Wilcock, 1946) of liquid viscosity data, all limited to atmospheric pressure, were used to obtain the coefficients in Table 2. No gas-phase data were found.…”