As vulcanization advances, the rubber test piece becomes more firm. The test is over when the recorded force or torque reaches its maximum or equilibrium value or when the allotted amount of time has passed. The parameters of the rubber compound and the test temperature affect how long it takes to generate a vulcanization curve.

In a die cavity that may be closed or nearly closed and is kept at a high temperature, a rubber test piece is present. Two dies, one of which oscillated over a modest linear or rotational amplitude, formed the cavity. Depending on the stiffness (shear modulus) of the rubber compound, this action causes a sinusoidal alternating linear or torsional strain in the test piece as well as a sinusoidal shear force or torque. The oscillating force or torque’s amplitude, represented by the envelope curve, is continually recorded as a function of time.

NextGen’s RPA Ultra – Advanced Rubber Process Analyzer Rheometer complies with ASTM D5289 standard.

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