July 2024
Intermediate to advanced
280 pages
12h 52m
English
Content preview from The Essential Handbook of Polymer Terms and Attributes
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46 DMA: Dynamic Mechanical Analysis
DMA (dynamic mechanical analysis) is a technique where a small deformation is applied to a sample in a cyclic manner. This allows the material’s response to stress, temperature, frequency, and other values to be studied.
The first attempt to do oscillatory experiments to measure the elasticity of a material was by Poynting in 1909. Early commercial instruments included the Weissenberg rheogo-niometer (˜1950) and the Rheovibron (˜1958). In 1961, Ferry wrote the Viscoelastic Properties of Polymers, which made dynamic measurements an integral part of polymer science, and he gives the best development of the theory available. A block diagram of DMA is shown in Figure 46.1.
DMA measures ...
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