## differential viscosity

https://doi.org/10.1351/goldbook.D01710
The derivative $$\eta _{\Delta }$$ of stress with respect to the rate of shear at a given @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 [Terms] [Paper]