08922 IUPAC Gold Book - reversible-addition-fragmentation radical polymerization 10.1351/goldbook.08922 08922 current initialism: RAFRP 1 Reversible-deactivation radical polymerization in which the dormant species is a stable (persistent) radical and the deactivation step involves reversible fragmentation. In some cases, the dormant polymer may undergo reversible coupling. Initialization usually involves decomposition of an initiator in the presence of monomer and the reagent. Polymerization commences when there is complete consumption of the mediator by initiator-derived radicals. Mediators that are proposed to provide control by this mechanism are certain 1,1-diarylethylenes, so-called captodative monomers, and carbonothioyl compounds. This mechanism could also contribute to the degree of control observed in RAFT polymerization. Initialization https://goldbook.iupac.org//terms/view/08956 RAFT polymerization https://goldbook.iupac.org//terms/view/08935 Reversible-deactivation radical polymerization https://goldbook.iupac.org//terms/view/08916 dormant species https://goldbook.iupac.org//terms/view/08952 PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1107 (https://doi.org/10.1515/pac-2020-1211) https://goldbook.iupac.org/terms/view/08922/html https://goldbook.iupac.org/terms/view/08922/json https://goldbook.iupac.org/terms/view/08922/plain Citation: 'reversible-addition-fragmentation radical polymerization' 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.08922 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. 2026-05-30T09:39:52+00:00