A rheometric characterization of the functional Polyurethane (PU) foam composite with and without solid additives (aluminum flakes) were experimentally measured using a computer controlled mechanical spectrometer (rheometer) ARES-G2. It is determined that PU composite exhibits a strong time thickening and shear thinning behavior. The rheological behavior of this composite can be described with the power-law generalized non-Newtonian fluid model. The rheometric tests showed that the PU/Al mixture exhibits thermal thickening and shear thinning behavior with the yield stress. The system can be described with the power-law generalized non-Newtonian fluid (Ostwald-de-Waele) model. The effective viscosity of PU composite increases with both the testing time (exponentially) and the solid content (polynomial) in the mixture.
Rheometric Studies of Functional Polyurethane Foam Composite
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Bakhtiyarov, SI, Oxley, JC, Smith, JL, Baldovi, PM, & Siginer, DA. "Rheometric Studies of Functional Polyurethane Foam Composite." Proceedings of the ASME 2017 International Mechanical Engineering Congress and Exposition. Volume 7: Fluids Engineering. Tampa, Florida, USA. November 3–9, 2017. V007T09A037. ASME. https://doi.org/10.1115/IMECE2017-72547
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