Viscoelastic properties of a cationic surfactant and its mixture with a hydrophobically modified polyacrylamide

摘要: The rheological behavior of aqueous solutions the cationic surfactant erucyl his(hydroxyethyl)methylammonium chloride and its mixture with hydrophobically modified polyacrylamide in presence low-molecular-mass salt KCl isopropanol was studied. critical micelle concentration (cmc) determined by fluorescence spectroscopy. Two regions having different slopes (6.0 3.5) were observed on viscosity versus curves plotted for semidilute log-log coordinates. It shown that greatest slope corresponds to regime short unbreakable cylindrical micelles whose lifetime is longer than time reptation, while smallest reflects long-lived micellar chains which repeatedly decompose course reptation. demonstrated addition an associating polymer based saline solution leads increase system a factor 1-3 improves heat stability.