12230 IUPAC Gold Book - entanglement 10.1351/goldbook.12230 12230 current 1 Entanglement, involving one or more macromolecular chains, of duration at least equal to the period of observation. A volume element, in which the chains of two or more macromolecules are entangled, acts as a temporary junction point of a transient polymer network, such as can occur in a semi-dilute solution or a concentrated solution. concentrated solution https://goldbook.iupac.org//terms/view/12229 semi-dilute solution https://goldbook.iupac.org//terms/view/12228 PAC, 2015, 87, 71. 'Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)' on page 90 (https://doi.org/10.1515/pac-2013-0201) https://goldbook.iupac.org/terms/view/12230/html https://goldbook.iupac.org/terms/view/12230/json https://goldbook.iupac.org/terms/view/12230/plain Citation: 'entanglement' 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.12230 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. 2026-08-04T14:05:04+00:00