James S. Peraro
Himont USA, 912 Appleton Rd, Elkton, MD 21921
Dynamic mechanical analysis (DMA) is used to characterize the behavior of a variety of materials. The development of the methodology for conducting these tests is the responsibility of ASTM D20.10.15 on dynamic mechanical properties. Similar activities are conducted in ISO under the jurisdiction of subcommitte #2. The test methods being developed cover a broad range of responses (temperature, frequency, and time) as well as stress states (i.e., tensile, bending, shear, and compression). Instruments have been developed which have greatly simplified the measurement of dynamic mechanical properties. The use of advanced computers and microprocessors and improved computer programs, to properly digest this information, have increased the demand for more sophisticated test results. The ease of developing this test data has resulted in DMA being a requirement in material characterization and specifications. The demand of the global market for this information has increased the interest of both ASTM and ISO members to develop standardized test methods for conducting and reporting DMA test data.