Ethylene glycol viscosity coefficients

The mobilities of alkylpyridines were modeled and predicted in capillary zone electrophoresis.35 The model predicted that compounds adopt a preferred orientation, and additionally predicted mobilities of structural isomers to within 4%, a higher degree of accuracy than can be obtained from simple considerations of van der Waal s radius. Quantitative prediction of the mobilities of some pyridines, such as alkenylpyridines, was not possible. Mobilities of small solutes in capillaries filled with oligomers of ethylene glycol were related to solution viscosity and the diffusion coefficient.36... 

Tse, G., Orbey, H., and Sandler, S.I. Infinite dilution activity coefficients and Henry s law coefficients of some priority water pollutants determined by a relative gas chromatographic method, Environ. Sci Tecbnol, 25(10) 2017-2022, 1992. Tsierkezos, N.G., Kelarakis, A.E., and Palaiologou, M.M. Densities, viscosities, refractive indices, and surface tensions of dimethyl sulfoxide + butyl acetate mixtures at (293.15, 303.15, and 313.15) K, /. Chem. Eng. Data, 45(2) 395-398, 2000. Tsierkezos, N.G. and Molinou, I.E. Densities and viscosities of ethylene glycol mixtures at 293.15 K, /. Chem. Eng. Data, 44(5) 955-958, 1999. 

Table 7.2 shows the viscosity, mutual diffusion coefficient, and thermodynamic factor for aqueous solutions of ethylene glycol and polyethylene glycol (PEG) at 25°C the diffusivity decreases considerably with increasing molecular weight, while the viscosity increases. Table 7.2 shows the thermal diffusion ratios for liquids and gases at low density and pressure the thermal diffusion ratios are relatively larger in liquids. 

Table 7.2a. Viscosities, mutual diffusion coefficients, and thermodynamic factors for aqueous solutions of ethylene glycol and PEG at 25°Ca...

Propylene glycol is very similar to ethylene glycol, but it is not toxic and is used in direct contact with food. It is more expensive and, having higher viscosity, shows lower heat transfer coefficients. 

Fig. 9. Arrhenius plots of the logarithmic, , rate of carbon monoxide binding to microperoxidase and of log T/r) (r = viscosity) against inverse temperature, T", - - -(a) Aqueous glycerol (79 wt. %) (b) aqueous ethylene glycol (75.1 wt.%) and (c) polyethylene glycol (39.6 wt.%). The temperature dependence of the activation process, feacti was deduced by fitting the observed rate coefficients to an...

The conductivities of MCIO4 (M = Na, K, Rb, or Cs) in ethylene glycol have been determined and the temperature coefficients of their mobilities estimated the analysis of the data shows that the ions are strongly solvated. Observations noted in studies of the viscosities of solutions of MI (M = Li, Na, K, Rb, or Cs) in DMSO also indicate that solvation of M is important in this solvent. ... 

Crickard and Skinner have reported viscosity coefficients for KI and Csl in ethylene glycol. The latter salt exhibits a negative value for 3, phenomenon not usually observed for electrolytes in non-aqueous solvents. 

This relationship is modified by two constants the molecular shape factor/ (a function of the molecular dimensions) and the boundary coefficient C, which takes into account the interaction between the solvent and the solute. In principle, two-photon fluorescence anisotropy decays in isotropic media should yield the same diffusion times as for single photon excitation, but with significantly increased initial fluorescence anisotropy this can be seen in Figure 11.17, which compares single- and two-photon anisotropy decays for the fluorescent probe rhodamine 6G in ethylene glycol. Rotational drflusion times for small molecular probes vary from nanoseconds to hundreds of picoseconds for isotropic rotational drflusion in low viscosity solvents. 

Table 7.4 Viscosities, Mutual Diffusion Coefficients, and Thermodynamic Factors for Aqueous Solutions of Ethylene Glycol and PEG at 25 °C (Chan et al., 2003)...

Fig. 5 (Speed x viscosity) dependence of coefficient of friction (p) from pin-on-disk measurements for different compositions of HEPES-glycerol and HEPES-ethylene glycol (EG) mixtures with (, [3 and without ( , ) polymer...

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