{"term":{"id":"12262","title":"pearl-necklace model","longtitle":"IUPAC Gold Book - pearl-necklace model","doi":"10.1351\/goldbook.12262","code":"12262","status":"current","synonym":"<em>synonym<\/em>: bead-rod model","definitions":[{"id":1,"text":"Model describing the flow behaviour of a dissolved chain macromolecule in terms of a freely jointed sequence of beads, each of which offers hydrodynamic resistance to the flow of the surrounding solvent continuum and is connected to the next bead by a rigid rod that offers no hydrodynamic resistance.","sources":["PAC, 2015, 87, 71. 'Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)' on page 103 (https:\/\/doi.org\/10.1515\/pac-2013-0201)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/12262\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/12262\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/12262\/plain"},"citation":"Citation: 'pearl-necklace model' 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.12262","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.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","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.","accessed":"2026-07-27T19:35:05+00:00"}}