Transactions of the Society of Rheology · 1966 · 142 citations · 0 references
EngineeringMeasurementFluid MechanicsVibration MeasurementMechanical EngineeringEducationSoft MatterNonlinear AcousticPolymersRheological MeasurementVibrationsNew InstrumentMechanicsPolymer ProcessingPolymer PhysicRheologyPolymer CompositesInstrumentationBiophysicsLinear ViscoelasticityPhysicsRheological Constitutive EquationPolymer ScienceRheological PropertyDifferent AmplitudesRandom VibrationPolymer CharacterizationLarge AmplitudesVibration Control
Using a new instrument, the influence of the shear amplitude s0 on the dynamic behavior of polymer solutions up to 700% shear was investigated. At amplitudes <∼100% shear, the dynamic viscosity η1 remained constant, as required by linear viscoelasticity; however, the shear storage modulus G′ decreased considerably. The steady-state flow curve forms the envelope of curves measured with different amplitudes and frequencies, predominantly in the range of higher rates of shear. The more complete analysis of the results is forthcoming.