reduced viscosity 

of a polymer
Synonym: viscosity number
https://doi.org/10.1351/goldbook.R05220
The ratio of the relative viscosity increment to the mass concentration of the polymer, c, i.e. ηic, where ηi is the relative viscosity increment.
Notes:
  1. The unit must be specified; cm3 g−1 is recommended.
  2. This quantity is neither a viscosity nor a pure number. The term is to be looked on as a traditional name. Any replacement by consistent terminology would produce unnecessary confusion in the polymer literature. Synonymous with viscosity number.
Source:
Purple Book, 1st ed., p. 63 [Terms] [Book]
Citation: 'reduced viscosity' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.R05220 RIS BibTex EndNote
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Last revised: February 24, 2014