Term: polyphenylenes
https://doi.org/10.1351/goldbook.08895

Definition:
Polymers composed of macromolecules containing exclusively \(\upsigma\)-bonded benzene or substituted benzene rings in the backbone: [image] where \(\ce{R^{1}}\), \(\ce{R^{2}}\), \(\ce{R^{3}}\) and \(\ce{R^{4}}\) are each hydrogen or an univalent group (structure-based polymer class name).

Note: Polyphenylenes are a subclass of polyarylenes and also a subclass of conjugated polymers except for poly(1,3-phenylene)s which are not conjugated polymers. [image]

Link: 
Related Term: conjugated polymers (http://doi.org/10.1351/goldbook.08785).
Related Term: polyarylenes (http://doi.org/10.1351/goldbook.08884).

Images:
1) polyphenylenes (https://goldbook.iupac.org/img/inline/08895-1.jpg) 
2) polyphenylenes (https://goldbook.iupac.org/img/inline/08895-2.jpg) 

Source: PAC, 2022, 94, 15. 'Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)' on page 58 (https://doi.org/10.1515/pac-2020-0501)

Citation: 'polyphenylenes' 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.08895

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