Thermal Conductivity of Poly(ethylene glycols) and Their Binary Mixtures

Abstract

A transient hot-wire method was used to measure the thermal conductivities of the first six members of the poly(ethylene glycol) series at 1 atm and In the temperature range 295-480 K. The method was used on a relative basis, and the accuracy of the measurements is estimated to be ±2%. The thermal conductivities of the binary systems ethylene glycol + tri(ethylene glycol), di(ethylene glycol) + tri(ethylene glycol), and di(ethylene glycol) + hexa(ethylene glycol) were also measured over the whole composition range at 1 atm and 295-480 K. The pure liquid data were correlated with use of a carbon number approach, and a linear mixing rule was used to extend the correlation to mixtures of poly(ethylene glycols). Agreement between prediction and experiment was within experimental error. © 1990, American Chemical Society. All rights reserved.