Rheological properties of hydrophobically modified carboxymethylcelluloses

It is shown that both samples evidence similar behavior although they differ in their HLB. Flow curves show extreme shear thinning behavior that resemble colloidal dispersion behavior, but oscillatory sweep and creep analysis are consistent with a sticky entanglement behavior. It seems that the structure of the pseudo-gel is largely heterogeneous with the presence of very dense zones made up of hydrophobic moieties together with a mainly entangled and sticky network of associated macromolecules.