14235 IUPAC Gold Book - isomorphous polymer co-crystal 10.1351/goldbook.14235 14235 current 1 Crystal consisting of two or more structurally different polymers, resulting in macromolecular isomorphism. Polytetrafluoroethene and poly(vinylidene fluoride), poly(3-hydroxybutanoate), and poly(3-hydroxypentanoate). PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1849 (https://doi.org/10.1351/PAC-REC-10-11-13) https://goldbook.iupac.org/terms/view/14235/html https://goldbook.iupac.org/terms/view/14235/json https://goldbook.iupac.org/terms/view/14235/plain Citation: 'isomorphous polymer co-crystal' 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.14235 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-06-29T00:19:36+00:00