Title: differential viscosity
Long Title: IUPAC Gold Book - differential viscosity
DOI: 10.1351/goldbook.D01710
Status: current

Definition
The derivative \(\eta _{\Delta }\) of stress with respect to the rate of shear at a given shear rate.

Related Term
- shear rate: https://goldbook.iupac.org//terms/view/S05636

Source
- PAC, 1979, 51, 1213. 'Terminology and Symbols in Colloid and Surface Chemistry Part 1.13. Definitions, Terminology and Symbols for Rheological Properties' on page 1217 (https://doi.org/10.1351/pac197951051213)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/D01710/html
- json: https://goldbook.iupac.org/terms/view/D01710/json
- xml: https://goldbook.iupac.org/terms/view/D01710/xml

Citation: Citation: 'differential viscosity' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.D01710
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Accessed: 2026-04-18T13:27:02+00:00