05598 IUPAC Gold Book - semi-interpenetrating polymer network 10.1351/goldbook.S05598 S05598 current initialism: SIPN mentioned: IPN 1 Polymer comprising one or more polymer networks and one or more linear or branched polymers characterized by the penetration on a molecular scale of at least one of the networks by at least some of the linear or branched macromolecules. A SIPN is distinguished from an IPN because the constituent linear or branched macromolecules can, in principle, be separated from the constituent polymer network(s) without breaking chemical bonds; it is a polymer blend. constituent https://goldbook.iupac.org/terms/view/C01281 polymer blend https://goldbook.iupac.org/terms/view/P04736 polymer network https://goldbook.iupac.org/terms/view/P04742 PAC, 2007, 79, 1801. 'Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)' on page 1815 (https://doi.org/10.1351/pac200779101801) https://goldbook.iupac.org/terms/view/S05598/html https://goldbook.iupac.org/terms/view/S05598/json https://goldbook.iupac.org/terms/view/S05598/plain Citation: 'semi-interpenetrating polymer network' 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.S05598 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. 2026-05-09T18:24:59+00:00