Dynamic Mechanical Analysis (DMA) is a technique used to characterize materials, specifically polymers. It applies a displacement to a sample and measures the mechanical response of the bulk material in a controlled temperature environment.
Dynamic mechanical analysis test conditions can be designed to study bulk mechanical properties of organic polymers to assist in determining key functional behavior related to:
Elasticity: Polymer resistance to permanent deformation due to resiliency of structure (recovery; stiffness)
Viscous Response: Deformation without breaking due to dissipation of mechanical energy by internal friction (damping)
DMA testing involves selection of the appropriate conditions of time, temperature, displacement and frequency to study the properties of interest. Some example selections are:
Examples of the various properties that can be measured through select test conditions:
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