unperturbed conformational state

https://doi.org/10.1351/goldbook.12189
Chain conformation corresponding to unperturbed dimensions.
Source:
PAC, 2015, 87, 71. (Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)) on page 74 [Terms] [Paper]