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MR-C3 Rotorless Rheometer
The curves and characteristic parameters on vulcanization of rubber materials can be obtained using rotorless Rheometer based on the measurement of the torque exerted by the rubber material on the oscillating die.
The MR-C3 Rotorless Rheometer has excellent property of reappears and stability. In a test with good mixed rubber and the timerange is 12min, the T90 may be several second difference in 4 continual experiments.
specification
·Range of temperature control: From room temperature to 200°C
·Temperature fluctuation in die: ≤±0.1°C;
·Temperature display resolution: 0.1°C;
·Rate of temperature increase:16°C/min-25°C/min
·Measurement range of torque:0-20Nm
·Torque resolution:0.001Nm;
·Angle of die oscillation: ±0.5°,±1°;
·Frequency of die oscillation:1.67Hz (100r/min)
MR-C3 Test Results
·ML Min. torque (dNm)—The testing value of sample’s curing characteristics (viscosity) before curing.
·MH Max. torque (dNm)—The testing value of sample’s shearing modulus or rigidity. Including even torque, max. torque for returning curve, and the max. Torque during the specific period of time where no even or returning curve happens.
·Ts1 (min)— when oscillates at the angle of 0.5° or 1°, the relative time when the torque increases to ML +1dNm. This figure shows the scorch time.
·Ts2 (min)— when oscillates at the angle of 3° or 5°, the relative time when the torque increases to ML +2dNm. This figure shows the scorch time
·T10 (min)—The time when the torque increases to ML + 10 (MH - ML ) / 100dNm. This figure shows the scorch time.
·T30 (min)—The time when the torque increases to ML + 30 (MH - ML ) / 100dNm.
·T60 (min)—The time when the torque increases to ML + 60 (MH - ML ) / 100dNm.
·T90 (min)—The time when the torque increases to ML +90 (MH - ML ) / 100dNm. This figure shows the optimum cure time.
·Ti (min)—The time when the torque increases to ML + i (MH - ML ) / 100dNm.
·Vc—Curing speed index. Vc =100/(T90 – Tsi)
