Title: ionomer
Long Title: IUPAC Gold Book - ionomer
DOI: 10.1351/goldbook.I03229
Status: current

Definition
Polymer composed of macromolecules in which a small but significant proportion of the constitutional units has ionic or ionizable groups, or both.

Note
Ionic groups are usually present in sufficient amounts (typically less than 10% of constitutional units) to cause micro-phase separation of ionic domains from the continuous polymer phase. The ionic domains act as physical crosslinks.

Related Terms
- micro: https://goldbook.iupac.org//terms/view/M03894
- phase separation: https://goldbook.iupac.org//terms/view/P04534

Source
- PAC, 2006, 78, 2067. 'Terminology of polymers containing ionizable or ionic groups and of polymers containing ions (IUPAC Recommendations 2006)' on page 2071 (https://doi.org/10.1351/pac200678112067)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/I03229/html
- json: https://goldbook.iupac.org/terms/view/I03229/json
- xml: https://goldbook.iupac.org/terms/view/I03229/xml

Citation: Citation: 'ionomer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.I03229
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Accessed: 2026-07-31T22:19:33+00:00