Term: freely draining
https://doi.org/10.1351/goldbook.F02516

Definition:
An adjective referring to a chain macromolecule the segments of which produce such small frictional effects when moving in a medium that the hydrodynamic field in the vicinity of a given segment is not affected by the presence of other segments. Thus, the solvent can flow virtually undisturbed through the domain occupied by a freely draining macromolecule.

Source: Purple Book, 1st ed., p. 61 (http://old.iupac.org/publications/books/author/metanomski.html)

Citation: 'freely draining' 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.F02516

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