RPA VISCO-ELASTOGRAPH

The RPA VISCO-ELASTOGRAPH is a flexible Rubber Process Analyzer which is used for the dynamic testing of visco-elastic properties of rubber compounds according to current DIN, ISO and ASTM standards in quality control and research & development.

  • ISO 6502
  • ASTM D5289
  • ASTM D6601
  • ASTM D6204
  • DIN 53529
  • ISO 13145
  • ASTM D7050
  • ASTM 6048
  • ASTM D7605

The Rubber Process Analyzer from GÖTTFERT is used to determine the viscoelastic material behavior in a plasticized state during vulcanization and after vulcanization of the material sample. For this purpose, a torsional load is imposed on the sample by the rotational oscillation of the lower test die half. Torque and phase angle are recorded as a function of test time.

The RPA VISCO-ELASTOGRAPH was developed with the experience of 45 years in the field of rubber testing and has proven high accuracy, reliability and repeatable measurement results.

The vulcameter can be equipped with different test chamber designs depending on the standard and material used. Available are quasi, as well as hermetically sealed test chambers in biconical, shore and paste versions. With the optional autoloader, multiple tests can be performed fully automatically without user intervention.

Compared to the MDR, the RPA offers much more freedom in test design. Both the frequency and amplitude can be selected program-controlled in a very large adjustment range. In combination with the very fast temperature control, not only frequency, amplitude and temperature sweeps but also ramp or relaxation tests can be performed fully automatically.

TECHNICAL SPECIFICATIONS
  • 8 different test chambers selectable
  • Frequency and amplitude sweep with preceding deflection, temperature sweep
  • Relaxation test up to a deflection angle of 90°
  • Ramp function up to a gradient angle of 90°
  • Deformation or stress-controlled operation
  • Temperature up to 230°C with extremely fast temperature control and homogeneous temperature distribution in the reaction chamber
  • Deformation frequency 0.01 to 100 Hz
  • Amplitude 0 to +/- 90°, angular resolution of the drive 0.001°.
  • Torque measuring range 5 Nm / 20 Nm Accuracy 0.05 %, reproducibility 0.003 %
  • Normal force measuring range up to 10 kN for testing sponge and cellular rubber compounds and the effect of the blowing agents contained therein
  • Cooling rate up to 1°C/s (optional)
  • Autosampler (optional)
Measurement types
  • Isothermal / non-isothermal curve
  • Frequency sweep
  • Amplitudes sweep
  • Temperature sweep
  • Ramp test
  • Relaxation test
Add-on
  • Autoloader
  • Volume punch
  • Normal force measurement
  • Torque calibration
Applications

Storage and loss modulus

The storage modulus (G`) measures the energy which is stored in the sample and which will be released after mechanical stress...

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Payne-Effect

The Payne-effect describes the alteration in the polymer properties, which are caused of mechanical stress...

 

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Variable time

Comparable with the usual vulcameter test here the module and the viscosity via the time are being captured...

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