Abstract
Liquid viscosity and density of six binary mixtures of HFC-134a with glycols [ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (400), and polypropylene glycol (2000)] have been measured in the temperature range from 273 to 333 K. The viscosity was measured by a rolling-ball viscometer calibrated with standard liquids of viscosities and densities (JS5, JS10, JS20, and JS50). The density was measured with a glass pycnometer. The uncertainties of the measurements were estimated to be less than 3.4 % for viscosity and 0.04 % for density, respectively. An equation is given to represent the obtained viscosity values as a function of weight fraction and temperature.
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Kumagai, A., Mochida, H. & Takahashi, S. Liquid viscosities and densities of HFC-134a+glycol mixtures. Int J Thermophys 14, 45–53 (1993). https://doi.org/10.1007/BF00522660
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DOI: https://doi.org/10.1007/BF00522660