{"term":{"id":"15252","title":"polydiene","longtitle":"IUPAC Gold Book - polydiene","doi":"10.1351\/goldbook.15252","code":"15252","status":"current","definitions":[{"id":1,"text":"Polymer prepared from a diene, or a substituted diene, or both in admixture.","notes":{"1":"A polydiene prepared from propadiene (allene) or a substituted propadiene (e.g., buta-1,2,-diene) is usually referred to as a polyallene or a polypropadiene (see the last two examples).","2":"Commercially widely spread polydienes, namely, polybutadienes and polyisoprenes, are commonly named with a use of numerical prefixes based on the addition mode taking place during the transformation of a monomer molecule into monomeric unit. The names are, for example: 1,2-polybutadiene for poly(1-vinylethylene) since the addition takes place at only one double bond located between carbon atoms \\(\\ce{C^1}\\) and \\(\\ce{C^2}\\) of a buta-1,3-diene molecule and 1,4-polybutadiene for poly(but-1-ene-1,4-diyl) since the conjugative addition resulting in enchainment of a buta-1,3-diene molecule via carbon atoms \\(\\ce{C^1}\\) and \\(\\ce{C^4}\\) takes place in the polymerization process. Use of these names is discouraged because a nomenclature locant should always refer to a molecule structure feature and not to a process of the molecule formation."},"exams":{"1":"  "},"sources":["PAC, 2009, 81, 1131. 'Glossary of class names of polymers based on chemical structure and molecular architecture (IUPAC Recommendations 2009)' on page 1141 (https:\/\/doi.org\/10.1351\/PAC-REC-08-01-30)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/15252\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/15252\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/15252\/plain"},"citation":"Citation: 'polydiene' 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.15252","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":"2026-05-20T16:25:57+00:00"}}