Densities and Refractive Indices for Glycol-Water Solutions...Triethylene Glycol, Dipropylene Glycol, and Hexylene Glycol

Densities and Refractive Indices of Aqueous Solutions of Diethylenetriamine, and Triethylenetetramine, and Tetraethylenepentamine.

“…The density-composition curves for diethylenetriamine, triethylenetetramine, and tetraethylenepentamine are shown in Figure 1. All three curves show pronounced maxima in the midcomposition range similar to those for many compounds, including aqueous solutions of propylene glycol (7), dipropylene glycol (2), ethylene glycol monomethyl ether (4), diethylene glycol monomethyl ether (3) and diethylene glycol monoethyl ether (3). II).…”

Densities and Refractive Indices of Glycol Ether-Water Solutions.

“…However, above 65 and 55 weight % on solutions of ethylene glycol monomethyl ether and ethylene glycol monoethyl ether respectively, density may be used in determining the glycol ether content to within ±0.1 weight % for both compounds. The curve for ethylene glycol monobutyl ether resembles the hexylene glycol-water curve (1). Ethylene glycol monobutyl ether above 10 weight % exhibits a steady decrease in density as the glycol ether concentration is increased and density provides a basis for analysis to within ±0.1 weight % .…”

Dynamic Measurement of Low Contact Angles by Optical Microscopy

“…As it is hygroscopic, a dish of the liquid was left for 2 weeks in a laminar flow cabinet to equilibrate with atmospheric moisture. A small correction to the refractive index was then made based on an ambient humidity measurement, Raoult’s law, and literature data on water–triethylene-glycol-mixture refractive index …”

“…A small correction to the refractive index was then made based on an ambient humidity measurement, Raoult's law, and literature data on water−triethylene-glycol-mixture refractive index. 20 Images were taken of a droplet using alternating objectives, with each image providing a measurement of both the reflective and the refractive mode. θ was calculated using the numerical method, as was the case for all experimental tests.…”