Low-amplitude oscillatory shear

LAOS low-amplitude oscillatory shear LIF laser-induced fluorescence... 

Machine processing exposes dispersions not only to shear but also to tensile stresses (extensional flow). Because of the lack of commercially available test equipment, studies of the extensional flow of polymer dispersions are stUl in their infancy. Little use is also made of viscoelastic techniques where the sample is subjected to low-amplitude oscillatory shear and the amplitude and phase of the oscillating stress is measured (usually as a function of the frequency of the oscillation). 

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