Rheology of diluted and semi-diluted partially hydrolyzed polyacrylamide solutions under shear: Experimental studies

摘要: Abstract Rheological properties of hydrolyzed polyacrylamide (HPAM) solutions were measured in oscillatory and flow shear. In shear the storage loss moduli increased as concentrations increased, but they decreased salinity increased. The relaxation spectra plotted using Kontogiorgos method. As shown spectra, number density segmental units at first then peaks shifted split into several concentration With increasing, motion increase became broader. tests, curves viscosity versus rate fitted by a power law equation. result showed that behavior index with increasing concentration, while it generally salinity. Furthermore, normal stress difference was differences rheometer compared calculated Laun equation results deviates experimental results.