Polymers composed of macromolecules containing exclusively arenediyl (formerly arylene) or heteroarenediyl (formerly heteroarylene) units in the backbone:
where Ar is a divalent arenediyl or heteroarenediyl group (structure-based polymer class name).
Note:
Polyphenylenes (Ar is phenylene or substituted phenylene) are a subclass of polyarylenes.
Source:
PAC, 2022, 94, 15. 'Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)' on page 53 (https://doi.org/10.1515/pac-2020-0501)