Rheometry

rheometry

Rheometry measures the flow and deformation of materials in response to applied stress and strain.

Complex fluids and semi-solids (such as gels, pastes, slurry mixtures, suspensions, and many others) exhibit time and temperature-dependent non-Newtonian behaviors. These include: shear thinning, shear thickening, visco-elasticity, and gelation. All such rheological behaviors are essential to product performance, and accurate rheometry information is crucial to thorough process and quality control.

In a rheometry measurement, a sample is subject to shearing at specific speed, frequency and temperature in a fixed configuration. The rheological change in viscosity alters the amount of torque required to maintain the shear speed and frequency. This time-dependent parameter provides insight to the operational performance of complex materials.

Uses and Limitations for Rheometry

  • What it is great for:
    • Understanding flow and deformation of complex materials
      (ahesives, sealants, inks, pastes, gels, polymers, etc.)
    • Correlating effects of additives
      (surfactants, enzymes, catalysts, thinning / thickening agents, etc.)
    • Accelerated testing of shelf-life, aging, and stability.
  • Limitations:
    • Destructive technique

Our technical team is happy to clarify on what technique will provide you with the best data.

INSTRUMENTS USED FOR
rheometry

Anton Paar MCR 302