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Understanding Yield Stress Measurements
4 Sept 2017The yield stress characteristic is a property associated with numerous types of complex fluids - whereby the material does not flow unless the applied stress exceeds a certain value,such as squeezing toothpaste from a tube. This White Paper discusses the various approaches available to measure yield stress, and aspects of the practical measurement set-up and test parameters that need to be considered to obtain relevant, robust and reliable yield stress data using a rotational rheometer.
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RheometryRheometers are used to measure the rheology of fluids, which is the flow of fluids in response to an applied force. The most common types of rheometer include shear rheometers (capillary, cone and plate and rotational cylinder) and extensional rheometers. Viscometers are similar to rheometers however viscometers only measure the viscosity of a fluid.