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Rotational rheometry is a powerful technique for the measurement of complex shear rheology across all material types – sensitive enough to measure the viscosity of dilute polymer solutions, and yet robust enough to measure the viscoelasticity of high modulus polymers or composites. Rotational rheometry is ideal for discerning structural and compositional changes of materials, which can be critical controlling factors in flow and deformation properties, and ultimately product stability and performance.
The basics of the rotational rheometry technique are as follows:
Rotational rheometry also enables other rheological properties to be evaluated, including yield stress, thixotropy, creep and recovery and stress relaxation.
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Polymeric materials are the most studied of all rheological materials and polymeric solutions in particular are perhaps the most interesting. They are ubiquitous in every-day life and play an important role in applications ranging from joint lubricat...
This application note shows how to predict the pressure requirements for a non-Newtonian liquid to flow through a straight circular pipe.
This whitepaper highlights some of the general considerations for designing and interpreting rheological tests and data in order to optimize dispersion stability.
Tips on how to control suspension Rheology by changing particle properties (size, zeta potential and shape).
The Kreiger-Dougherty model describes the effect of the dispersed phase properties on suspension viscosity. This note discusses how the relevant fitting parameters can be determined for use with this model.
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