ASTM D6601 covers the use of a rotorless oscillating shear rheometer to measure the vulcanization characteristics of rubber compounds and their after-cure dynamic properties at set temperatures below the cure temperature. It uses specified cure conditions that approximate a static cure. ASTM states it is not intended to replace ASTM D5289.
In one test, the method determines cure characteristics under strain and frequency conditions that do not significantly affect cured dynamic properties, then measures vulcanizate dynamic properties well below the cure temperature to better relate results to service. It may be used for quality control, research on compounds containing curatives and evaluating compounding ingredients. ASTM warns that silicone or fluoroelastomer compounds may slip during strain sweeps, which makes results unreliable.
The method requires a rotorless shear rheometer that can cure the sample and then run dynamic tests at lower temperatures. Our RPA Ultra rubber process analyzer supports testing to ASTM D6601. If you need help matching ASTM D6601 requirements to your parts or setup, contact our team.
