Term: reactive blending https://doi.org/10.1351/goldbook.RT07150 Definition: Mixing process that is accompanied by the chemical reaction(s) of components of a polymer mixture. Notes: 0) Examples of reactive blending are: (a) blending accompanied by the formation of a polymer-polymer complex, (b) the formation of @B00682@ or graft copolymers by a combination of radicals formed by the mechano-chemical scission of polymers during blending. 1) Reactive blending may also be carried out as reactive extrusion or reaction injection molding (RIM). Related Terms: 1) block (http://doi.org/10.1351/goldbook.B00682). Source: PAC, 2004, 76, 889. 'Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)' on page 894 (https://doi.org/10.1351/pac200476040889) Citation: 'reactive blending' 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.RT07150 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.