Term: perfect network https://doi.org/10.1351/goldbook.PT07570 Definition: polymer network composed of chains all of which are connected at both of their ends to different junction points. Note: If a perfect @NT07562@ is in the rubbery state then, on macroscopic deformation of the @NT07562@, all of its chains are elastically active and display rubber elasticity. Related Terms: 1) network (http://doi.org/10.1351/goldbook.NT07562). 2) polymer network (http://doi.org/10.1351/goldbook.P04742). Source: 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) Citation: 'perfect network' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.PT07570 License: 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. Disclaimer: 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.