Rotational Online-Rheometer

Measuring system for continuous, real-time monitoring of viscoelastic properties


Online-Rheometer ROR

Determination of viscoelastic properties of polymer melts

A Rotational Online Rheometer (ROR) is an industrial proven testing instrument integrated to an lab extruder to continuously measure the viscoelastic properties of fluids or polymer melts in real time. Unlike traditional lab rheometers that require manual sample collection, or capillary process rheometers that measure steady shear viscosity, an ROR provides instantaneous feedback on molecular structure (e.g., molecular weight distribution, branching) and flow behavior without manual sample collection and preparation.
 

Success Story: Our testing instruments in use

Roundtable: Know-how directly from our lab

Good to know

While conventional rotational rheometers in the lab mainly capture polymer structure at low frequencies, and capillary rheometers describe flow behavior at high shear rates, the ROR combines the advantages of both approaches:
fast, process-relevant data on polymer structure and flow behavior in real-time.




Method

  • Continuous characterization of viscoelastic material properties (G’ and G”)
  • Material feeding by lab extruder, gear pump, drumunloader or any other feeding unit

Product features

  • Oscillation frequency 0,1-50Hz
  • Oscillation deformation ±0,01° (±) – ∞; Rotation
  • Maximum circular frequency 314 1/s
  • Maximum shear rate in transient mode 500 s-1
  • Measurement up to 350°C 

Applications

  • Materials: Polymer melts or any kind of material which can be extruded or feeded to the Rotational Online Rheometer
  • Frequency sweep
  • Amplitude sweep
  • Temperature sweep
  • Ramp- Relaxation test with continuous deformation angle
  • Transient Viscosity with continuous rotation
  • Measurement at different hydrostatic pressures (pressurized measurement up to 400bar)

Rheo-Info

Rotational Online Rheometer (ROR)

Measurement of Viscoelastic Properties of Polymer melts – continuously, online

Details

Sales Service