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Polyethylene Glycols. VIII

Takeo Ishiguro, Sadatake Kato, Yasutada Sakata, Yasaburo Akazawa

Abstract

Relationship between the concentration and specific gravity, and refractive index were measured in the systems of water-glycol, glycol-diethylene glycol, and diethylene glycol-triethylene glycol. The concentration-specific gravity relationship gave a curve with a very slight bend while the relationship between concentration and refractive index was linear. It was found possible, therefore, to calculate the concentration, x, of each component by the measurement of a refractive index, n, of a mixture of two substances. Following empirical formulae for each system were proposed.Water-Glycol: glycol%, x=1006.0n-1341.0.Glycol-Diethylene glycol: diethylene glycol%, x=6493.5n-9301.3.Diethylene glycol-Triethylene glycol: triethylene glycol%, x=10526.3n-15240.0

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Key concepts: Diethylene glycol, Triethylene glycol, Polyethylene glycol, Chemistry, Polymer chemistry, Ethylene glycol, Organic chemistry