12761 IUPAC Gold Book - dilatometry 10.1351/goldbook.12761 12761 current 1 The measurement of changes with time in the volume, length, width, or thickness of a material sample caused by temperature changes under negligible load or by chemical reaction. One-dimensional changes are often measured using mechanical displacement detection. Volume changes are often determined using an inert confining liquid, for example, mercury. Measurement of an applied hydrostatic pressure allows the determination of pressure–volume–temperature (\(p,V,T\)) diagrams. A polymerisation reaction is an example of a chemical reaction that can be studied using a dilatometer. dilatometer https://goldbook.iupac.org//terms/view/12760 PAC, 2013, 85, 1017. 'Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)' on page 1025 (https://doi.org/10.1351/PAC-REC-12-03-02) https://goldbook.iupac.org/terms/view/12761/html https://goldbook.iupac.org/terms/view/12761/json https://goldbook.iupac.org/terms/view/12761/plain Citation: 'dilatometry' 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.12761 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. 2026-06-06T21:40:22+00:00