Rheology – TA Instruments AR-G2


The Figure demonstrates typical measurements from rheology

Anton Paar Rheometer

Anton Paar Rheometer
Anton Paar Rheometer - Graph
The Figure demonstrates typical measurements from rheology
TA Instruments DMA Q800 - Image
Typical Materials Tested on a Rheometer Suspensions, emulsions, foam, paint, coatings, adhesives, cosmetics, food, personal care products, gels, and hydrogels

Sample Requirements

The sample size and type depends on the measurement and geometry

Summary of Technique

Rheometer measures both viscosity and viscoelasticity of fluids, semi-solids and solids. In a rheological measurement stress, strain (shear rate) are all calculated signals. The raw signals behind the scene are torque, angular displacement and angular velocity.

  • Viscosity- defined as a materials resistance to deformation and as a function of shear rate or stress with time and temperature dependence.
  • Viscoelasticity- is a property of a material that exhibits both viscous and elastic character.

Common testing methods are:

  • Stress and strain sweep
  • Time sweep
  • Frequency sweep
  • Temperature ramp
  • Temperature sweep
  • Stress relaxation

Information Provided

  • Los modulus, storage modulus, tan delta with respect to time, temperature, frequency and stress/strain
  • Yield stress
  • Non-Newtonian viscous behavior
  • Thixotropy
  • Elasticity
  • Stress relaxation
  • Viscosity
  • Curing rates
  • Flow behaviors
  • Crosslinking density
  • Stability of materials

Lab Location and Contact Information

Location: Thermal Analysis, Rheology, and Polymer Processing Lab
Point of Contact: Dennis Ndaya