secondary relaxation temperature

https://doi.org/10.1351/goldbook.12800
Temperature characterising a secondary relaxation peak identified as the temperature at which the loss modulus (or loss tangent), measured by DMA or DETA, exhibits a maximum at the measurement frequency, due to the occurrence of localised motions involving only short segments of the polymer chains, or side groups of the polymer chains.
Source:
PAC, 2013, 85, 1017. (Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)) on page 1038 [Terms] [Paper]
Citation: 'secondary relaxation temperature' 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.12800 RIS BibTex EndNote
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