General: The time required for a given sample to obtain a given degree of aging depends on the type of rubber in the sample. The test period used should be such that the aging of the sample is not reduced to the final determination that hinders the physical properties of the sample. This test result is ineffective when the degradation mechanism caused by the use of high temperature aging differs from the degradation mechanism that occurs at the use temperature.
Accelerated aging of hot air: The test temperature is selected according to the provisions of GB/T2941 or agreed between the relevant personnel; the aging time can be selected as a multiple of 24, 48, 72, 96, 168h or 168h.
Heat resistance test: The test temperature shall be determined according to GB/T2941 or by the relevant personnel. The test temperature shall be representative of the use temperature of the sample; the aging time may be a multiple of 24, 48, 72, 96, 168h or 168h.
The above is the standard test conditions of the new ventilation type aging test chamber GBT3512-2001.
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