Term: ionomer multiplet https://doi.org/10.1351/goldbook.IT07216 Definition: Ionic aggregate, in a polymer matrix of low polarity, formed through the association of ion-pairs in an ionomer. Related Terms: 1) polarity (http://doi.org/10.1351/goldbook.P04710). 2) association (http://doi.org/10.1351/goldbook.A00472). 3) ionomer (http://doi.org/10.1351/goldbook.I03229). Source: PAC, 2006, 78, 2067. 'Terminology of polymers containing ionizable or ionic groups and of polymers containing ions (IUPAC Recommendations 2006)' on page 2072 (https://doi.org/10.1351/pac200678112067) Citation: 'ionomer multiplet' 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.IT07216 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.