Title: regioirregular polymer
Long Title: IUPAC Gold Book - regioirregular polymer
DOI: 10.1351/goldbook.08866
Status: current

Definition
Regular polymer or an irregular polymer whose macromolecules contain non-uniformly oriented simple asymmetric repeating units.

Note
The difference between regioirregular, irregular and regular chains is shown in the following chart.  

Related Terms
- head-tail isomerism: https://goldbook.iupac.org//terms/view/08824
- regioregular polymer: https://goldbook.iupac.org//terms/view/08868

Source
- PAC, 2022, 94, 15. 'Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)' on page 45 (https://doi.org/10.1515/pac-2020-0501)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08866/html
- json: https://goldbook.iupac.org/terms/view/08866/json
- xml: https://goldbook.iupac.org/terms/view/08866/xml

Citation: Citation: 'regioirregular polymer' 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.08866
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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.
Accessed: 2026-04-18T09:11:45+00:00