chemical modification 

https://doi.org/10.1351/goldbook.CT07135
Process by which at least one feature of the chemical constitution of a polymer is changed by chemical reaction(s).
Note:
A configurational change (e.g., cis–transisomerization) is not usually referred to as a chemical modification.
Source:
PAC, 2004, 76, 889. (Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)) on page 891 [Terms] [Paper]
Citation: 'chemical modification' 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.CT07135 RIS BibTex EndNote
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Last revised: February 24, 2014