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Principle

Application of a shear rate range (in steady mode) or a strain frequency (in dynamic mode) and measurement of the correspondent resistance of the material to flow to determine viscosity and viscoelastic properties (𝜂*, G’, G” and tan𝛿) respectively.


Capabilities

  • Measurement of viscosity in a wide range of shear rates (0.01 - 1000 s-1) and temperatures.
  • Frequency sweep tests for viscoelastic materials.
  • Time sweep test to evaluate stability.
  • Temperature sweep test for screening crosslinking temperature, gelation point, …
  • Dynamic Mechanical Analyses (DMA) for phase transitions and modulus variation with temperature.

Assets


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RFS III Rheometrics

Strain controlled rheometer with high sensitivity for low viscosities.

Geometries: parallel plates, cone & plate, concentric cylinders.

Temperatures: -20 to +60 °C.

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RMS 800

Strain controlled rheometer to measure viscoelasticity of polymer melts

Geometries: parallel plates.

T from +30 to +400 °C.

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Anton Paar MCR502

Stress controlled rheometer for steady and dynamic measures from fluids to polymer melts.

Geometries: parallel plates, cone & plate, concentric cylinders.

Dynamic Mechanical Analysis with torsional geometry.

T from -150 to +500 °C.

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Ares Rheometrics

Strain controlled rheometer for steady and dynamic measures from fluids to polymer melts.

Geometries: parallel plates, cone & plate, concentric cylinders.

Dynamic Mechanical Analysis with torsional geometry.

T from -150 to +400 °C.

Preparative Techniques

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Polishing machine Struers Labopol-30

Polishing machine equipped with an autosampler, to prepare embedded sections and surfaces, with a finish at 0,25 µm.

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Microtomy

Microtome to prepare cuts of samples, at room temperature, with a thickness in the range 0,5-50 µm.

Cryofracture

Fracture of frozen of samples in liquid nitrogen (-196°C), to prepare sections of soft samples.

Application Case Study