Dynamic Mechanical Analysis (DMA) measures viscoelastic properties (storage modulus, loss modulus and tan delta peak) of polymeric materials as a function of temperature, frequency and relative humidity. The DMA has a motor and driveshaft used to apply torsional, tensile or bending stress on materials, and a linear variable differential transformer will be used to measure linear displacement.




Deformation Modes

Maximum Force

18 N

Minimum Force

0.0001 N

Force Resolution

0.00001 N

Frequency Range

0.001 to 200 Hz

Dynamic Deformation Range

±0.005 to 10,000 μm

Strain Resolution

0.1 nm

Modulus Range

103 to 3×1012 Pa

Modulus Precision

± 1%

Tan δ Sensitivity


Tan δ Resolution


Temperature Range

Standard Furnace: -160°C to 600°C
RH Accessory: 5°C to 120°C

Time-Temperature Superposition


Typical properties and behaviors measured by the DMA 850 ((TA instrument)) include:

• Modulus of Elasticity (E) • Modulus of Rigidity (G) • Complex Moduli (E*,G*)

• Storage and Loss Moduli (E’, E”, G’, G”) • Damping Properties (tan δ) • Glass transition

• Secondary Transitions • Melting and crystallization • Softening

• Relaxation behavior • Frequency Effects • Creep and Recovery

• Stress Relaxation • Time-Temperature Superposition (TTS) • Viscous flow

• Dynamic Fatigue • Impact Strength • Toughness

• Resiliency • Stress-strain Curves • Shrink Force

• Composites • Composition of blends • Phase Separation (Polymer Blends, Copolymers…)

• Material defects • Effects due to fillers • Orientation Effects

• Effects of Additives • Aging (physical or chemical) • Gelation

• Crosslinking Reactions • Crosslink Density • Mullins Effect

Testing mode

Stress-Strain Curves, Creep and Stress Relaxation, Isostress and Isostrain

Examples/Application areas

1. Jonoobi, M., Harun, J., Mathew, A. P. & Oksman, K. Mechanical properties of cellulose nanofiber (CNF) reinforced polylactic acid (PLA) prepared by twin screw extrusion. Compos. Sci. Technol. 70, 1742–1747 (2010).

2. Moreno, A.; Morsali, M.; Sipponen, M. H. Catalyst-Free Synthesis of Lignin Vitrimers with Tunable Mechanical Properties: Circular Polymers and Recoverable Adhesives. ACS Appl. Mater. Interfaces 2021, acsami.1c17412. https://doi.org/10.1021/acsami.1c17412.

Useful link


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