The rheology of aqueous polyurethane dispersions

Improved polyurethane dispersion stability via continuous process

“…We measured up to 80-100% higher power (depending on the viscosity) in our testing unit. Furthermore, it has also been reported 16 that aqueous PUDs exhibit different rheological properties at various solid concentrations. Both these findings could help to explain the phenomenon.…”

Soft water-soluble microgel dispersions: Structure and rheology

“…As it is customary to do when dealing with microgels, experimental results are more conveniently expressed in terms of apparent particle volume fraction Φ, rather than in mass concentration [8,15,16]. This is achieved in dilute regime by matching the linear terms in Huggins and Einstein equations: For high concentrations (i.e., high volume fractions), we measured shear viscosities versus shear rate.…”

Elastic Networks of Protein Particles

“…The η*(w) curves were greater than the η(g) curves throughout the measured shear region, indicating a structured system. 48,49 But the η*(w) and η(g) curves did not show parallel behaviour, which makes it impossible to use a shift factor. 50 The unparallel behaviour was observed previously in particle gel systems, but no explanation has yet been found for this behaviour.…”