Korea-Australia Rheology Journal, Vol.27, No.2, 151-161, May, 2015
Effect of temporary network structure on linear and nonlinear viscoelasticity of polymer solutions
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We investigated the effects of temporary network structures on linear and nonlinear viscoelasticity of polymer solutions by use of oscillatory shear (LAOS) flow. We tested two different types of polymer solutions: entanglement systems and ion complex systems. It was found that the entanglement network is difficult to show shear-thickening while network of ion complex gives rise to shear-thickening. The objectives of this paper are the test of strain-frequency superposition for various polymer solutions and to suggest a new method classifying complex fluids consisting temporary networks using LAOS data.
Keywords:large amplitude oscillatory shear;strain-frequency superposition;temporary network structure;shear-thinning fluids;shear-thickening fluids
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