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Publicly Available Published by De Gruyter April 1, 2019

International Standard for viscosity at temperatures up to 473 K and pressures below 200 MPa (IUPAC Technical Report)

From the journal Chemistry International

Josefa Fernandez, Marc J. Assael, Robert M. Enick, and J.P. Martin Trusler

Pure and Applied Chemistry, 2019

Volume 91, Issue 1, pp. 161-172

This paper presents the results of an investigation into possible liquid viscosity standards to meet an industrial requirement for a liquid with a nominal viscosity of 20 mPa s at a temperature of 473 K and pressure of 200 MPa with a relative expanded uncertainty of less than 5 %. There are no commercially available certified viscosity reference liquids that meet this requirement. Four candidate fluids were examined: squalane, Krytox GPL102, tris(2-ethylhexyl) trimellitate (TOTM), and dipentaerythritol hexa(3,5,5-trimethylhexanoate) (DiPEiC9). Although none of these fluids satisfies all of the criteria, two fluids were identified as being suitable as International Standards for viscosity at temperatures up to 473 K and pressures below 200 MPa. These fluids are squalane and tris(2-ethylhexyl) trimellitate (TOTM), which at= 473.15 K and p = 200 MPa present viscosity values of 5 mPa s and 10 mPa s, respectively.

https://doi.org/10.1515/pac-2018-0202

Online erschienen: 2019-04-01
Erschienen im Druck: 2019-04-01

©2019 IUPAC & De Gruyter. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. For more information, please visit: http://creativecommons.org/licenses/by-nc-nd/4.0/

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