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TA instruments - Rubber Rheometers

Virtually every aspect of a rubber material’s processing and performance characteristics is influenced by its rheological properties. TA Instruments provides a complete range of rotorless shear rheometers and curemeters to help you optimize processing, curing, and application performance.

All TA Instruments rubber rheometers are manufactured to exacting mechanical standards and with the latest measurement technology for the most accurate, reliable, and reproducible data available. Available automation systems allow for maximum unattended laboratory productivity in all test environments. Relevant ASTM, DIN, and ISO standards are easily met, as are demands for advanced testing, making these instruments the ideal choice for quality control, analytical, and research needs.

Available models

Frequency
0.1 to 2.0 Hz (6 to 120 cpm)
Amplitude
±0.1 to ±7° arc (continuous)
Strain
±1.47 % to ±100 %
Torque
0.0001 to 25 Nm
Temperature
Ambient to 230 °C
Maximum Ramp Rate
80 °C/min (1.33 °C/s)
Die Type
Sealed bicone, 0.48 mm gap
Sample Volume
4.5 cm3
Platen Sealing Pressure
4.5 bar

The RPA flex, Rubber Process Analyzer, is the new standard in rotorless oscillating shear curemeters. In addition to the standard tests of cure at fixed strain and frequency, the RPA flex can be configured to include variable strain, frequency, advanced LAOS testing, and sample pressure measurement.

The RPA flex features a wide range torque transducer and variable sealing pressure and sample pressure sensor options. Employing sealed biconical dies, the RPA flex meets all relevant ASTM, ISO, and DIN standards for rubber and elastomer characterization. The unique design includes an ultra-rigid test frame, variable direct drive motor, precision temperature control with optional cooling, available Autosampler, and powerful Scarabaeus Control and Analysis Software, making it the ideal platform for QC or R&D environments.

Frequency
0.001 To 50 Hz (0.06 To 3,000 cpm)
Amplitude
±0.005 to ±360° arc (continuous)
Strain
±0.07 % to ±5000 %
Torque
0.0001 to 25 N.m
Temperature
Ambient to 230 °C
Maximum Ramp Rate
80 °C/min (1.33 °C/s)
Die Type
Sealed bicone, 0.48 mm gap
Sample Volume
4.5 cm3
Platen Sealing Pressure
2 to 8 bar Adjustable
Sample Pressure
Optional: 0 to 8,500 kPa

The TA Instruments RPA elite rubber process analyzer (RPA) is the most advanced rotorless oscillating shear rheometer dedicated to the complete characterization of polymers, rubber and rubber compounds at all stages of manufacture.

The RPA elite provides invaluable viscoelastic data on materials that are uncured, through the curing process, and in situ cured materials. The ultra-rigid test frame, high-resolution variable direct drive motor, ultra-stiff wide-range torque transducer, and precision temperature control provide the most precise and accurate torque, viscosity and viscoelastic properties of elastomers over the widest ranges of testing conditions.

The fully flexible architecture of the RPA elite enables advanced testing capabilities beyond any other rubber rheometer including: complete post cure viscoelastic characterization, fully programmable sealing pressure, large amplitude oscillatory shear (LAOS) and arbitrary waveform deformations.

Key features

  • High resolution variable direct drive motor for absolute strain control
  • Proprietary high stiffness, wide torque range transducer with high sensitivity for noise free data
  • Extremely rigid test frame for accurate compliance free data
  • Upgradeable to the widest range of tests and testing conditions
  • Fully programmable variable testing parameters (strain, frequency, temperature, and closing pressure)
  • Available autosampler for unattended operation
  • Pneumatic locking cylinders with adjustable platen closing force and pressure sensor
  • User calibration and user replaceable seals

Rubber Rheometer Automation

TA instrumentsTA instruments provides innovative material characterization instruments that are widely used for research, analysis, and quality control in the evaluation of physical properties. We are the world’s leading supplier of thermal analysis, rheology, and microcalorimetry instruments, and our product areas have expanded to include thermal conductivity & diffusivity, dilatometry, rubber testing, and dynamic mechanical characterization.
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