The test method defined in the ASTM D573-04 standard developed by the American Society for Testing and Materials (ASTM) includes a procedure for determining the effect of high temperature on the physical properties of vulcanized rubber. The results of this test method do not fully correlate with service performance, as performance conditions vary widely. However, this test method is used to evaluate rubber compounds on the basis of laboratory comparison.
During testing, vulcanized rubber samples are exposed to the decomposition of air at certain high temperatures for known periods, and then their physical properties are determined. The results obtained are compared with the properties identified and noted changes in the original samples. Unless otherwise stated, the determination of physical properties is made according to the methods defined in the ASTM D412 standard. Again, unless otherwise specified, the requirements described in ASTM D3182 and ASTM D3183 standards must be followed and made part of this test method.
If there is a conflict between the fundamentals of this test method and the basis of detailed specifications or test methods for a particular material, then the latter takes precedence.
This test method provides a way to evaluate these performance characteristics of rubber under certain acceleration conditions as stated. Important information about standard compounds used for precision testing for accelerated test aging assessment is included in the standard annex (Annex A1).
The tensile strength and ultimate elongation or tensile (strain) properties of samples aged at different intervals are determined as the intervals expire in the progression of aging, regardless of the fact that more samples may still be aged.
Briefly, it is necessary to determine the effect of high temperatures on the physical properties of vulcanized rubber. As the tests are performed in heated ovens, the effects are dependent on the laboratory environment and conditions and should be analyzed for comparison purposes. One of the concerns of a product design engineer is the expected life of a component. The properties of vulcanized rubber change during service. Therefore, elastomers and rubber products must resist deterioration of physical properties over time caused by oxidative and thermal aging.
Among the numerous tests, measurements, analyses, and evaluations our organization provides for businesses in various sectors, we also offer standard air oven degradation testing services for rubber under the ASTM D573-04 standard, utilizing a trained and expert staff and advanced technological equipment.
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