torsional pendulum analysis

https://doi.org/10.1351/goldbook.12815
Dynamic mechanical analysis performed using a torsion pendulum.
Notes:
  1. A strip-shaped polymer sample is mounted on a torsion pendulum and subjected to a small torque. The decay in the amplitude of the free sinusoidal oscillation is observed over a range of temperatures.
  2. Storage (shear) modulus G', loss (shear) modulus G'', and the loss-tangent can be calculated from the logarithmic decrement, \(\mathit{\Lambda}\).
Source:
PAC, 2013, 85, 1017. (Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)) on page 1043 [Terms] [Paper]
Citation: 'torsional pendulum analysis' 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.12815 RIS BibTex EndNote
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