On the rheological modeling of associative polymers

摘要: The viscoelastic behavior of a commercial hydrophobic alkali-soluble emulsion (HASE) associative polymer in small-amplitude oscillatory, steady, and unsteady simple-shear flows is analyzed with model that couples the upper-convected Maxwell constitutive equation kinetic accounts for structural changes induced by flows. A spectrum relaxation times considered prediction rheological properties to account association dynamics between groups along HASE backbone physical entanglements. Viscoelastic response similar transient network assembled through associations, where kinetics chain breakage reformation consistent classical descriptions formulations. deviations from Cox–Merz rule predicts observed limiting behaviors at high strain rates stress inception shear flow.