Dynamic mechanical analysis (DMA) is a technique used to study mechanical properties of objects, typically viscoelastic properties of polymer materials. Traditionally, this involves understanding the viscous and elastic mechanical properties of a polymeric material under a constant deflection. In this case, DMA is a powerful tool for monitoring the strain of a material when a sinusoidal stress is applied and allows the understanding of complex time dependent moduli.
Many time-, frequency- and temperature-dependent properties of polymers can be elucidated from DMA experimentation. The storage modulus (E’ or G’) of a material can be measured, along with the Young’s modulus. Shear, bulk and compressive moduli can be determined through different stressing modes. By modulating the temperature with respect to a constant stress, the glass transition temperature can be also elucidated. Crack propagation experimentation can be used to follow defect formation within a polymer material and may shed insight into how tough a material behaves.
There is a wide range of applications which DMA measurements may be applicable for, including:
| Excitation Frequencies | 0.00001 – 200 Hz |
| Maximum Dynamic Force | 300 N peak to peak |
| Maximum Dynamic displacement | 12 mm peak to peak |
| Temperature Range | -70 – 500 °C |
| Modulus Range | 250 – 3×1012 Pa |
| Measurement Range | > 7 decades |
Other methods may be available. Contact us at info@thermalanalysislabs.com or call (506) 457-0498 to discuss.