Term: homochain polymer https://doi.org/10.1351/goldbook.H02840 Definition: A class of polymer in which the main chain is constructed from atoms of a single element. Homochain polymers are named by placing the name or symbol of the element in the main chain immediately before the expression '-chain polymer', e.g. carbon-chain polymer or C-chain polymer; sulfur-chain polymer or S-chain polymer. Source: Purple Book, 1st ed., p. 146 (http://old.iupac.org/publications/books/author/metanomski.html) Citation: 'homochain polymer' 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.H02840 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.