TA Instruments - RPA elite

Manufactured by  TA Instruments
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The latest technology with the most accurate and reproducible data available.

The latest technology with the most accurate and reproducible data available. 
The TA Instruments RPA elite rubber process analyzer (RPA) is the most advanced rotorless rotational 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.
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Features of RPA elite
  • The most advanced design for testing flexibility and unmatched data precision and accuracy
  • 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
  • Fully programmable testing parameters and methods including: strain, frequency, temperature, time, and sealing pressure
  • Widest range and combination of tests and testing conditions available
  • Pneumatic locking cylinders with adjustable platen closing force and pressure sensor
  • Available autosampler for unattended operation
  • User calibration and user replaceable seals
General Specifications

There are no General Specifications available.

Additional Specifications

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

Test Modes: Cure (isothermal, ramp, step)
Strain (sweep, offset, LAOS)
Frequency Sweep
Stress Relaxation
Advanced (multi-frequency, abitrary waveforms)

Measured Data: Torque, Temperature, Frequency, Amplitude, Sample Pressure (optional)

Calculated Data: Viscoelastic properties including: G’, G”, G*, S’, S”, S*, tan Δ, Η’, Η”, Η*, LAOS Lissajous curves, non-linearities in stress and strain, and more than 550 process parameters including: ts1, TC10, TC50, TC90, S’min, S’max, scorch time, cure rate

Standards: ASTM D5289, D6048, D6204, D6601, D7050, D8059; ISO 6502, 13145; DIN 53529

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