15421 IUPAC Gold Book - solid-state polymerisation 10.1351/goldbook.15421 15421 current 1 Polymerization of a crystalline monomer. The initiating species can be formed by the action of heat, irradiation of the monomer with, e.g., ultraviolet light or γ-rays, or (less frequently) by chemical initiation. A solid-state polymerization may lead to a semi-crystalline polymer having a crystal structure different from that of the crystalline monomer, or alternatively it may proceed as a topochemical polymerization. Depending on the initiation mode and the structure of the monomer, a solid-state polymerization may proceed by a radical or an ionic mechanism. Use of the term "bulk polymerization" to describe solid-state polymerization is discouraged. topochemical polymerization https://goldbook.iupac.org//terms/view/15423 PAC, 2008, 80, 2163. 'Glossary of terms related to kinetics, thermodynamics, and mechanisms of polymerization (IUPAC Recommendations 2008)' on page 2184 (https://doi.org/10.1351/pac200880102163) https://goldbook.iupac.org/terms/view/15421/html https://goldbook.iupac.org/terms/view/15421/json https://goldbook.iupac.org/terms/view/15421/plain Citation: 'solid-state polymerisation' 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.15421 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. 2026-04-18T05:09:50+00:00