Anomalous dilute solution properties of segmented polydimethylsiloxane–polyurea copolymers in isopropyl alcohol

The effect of ultrasound treatment on the structural, physical and emulsifying properties of dairy proteins

“…This effect is thought to be due to the amphiphilic character of the proteins (in comparison to non amphiphilic polysaccharides) which yields negative values of k H and k K . Similar results have been reported in literature for other amphiphilic biopolymers (Curvale et al, 2008;Delpech & Oliveira, 2005;Yilgor et al, 2006).…”

“…As can be seen from results in Table 4, the values obtained for the Huggins (k H ) and Kraemer (k K ) constants are both negative, which indicate a good solvation considering k K, but an unusual behaviour in the case of k H . However, negative values of k H have also been reported in literature for biopolymers with amphiphilic properties, such as bovine serum albumin dissolved in water (Curvale, Masuelli, & Padilla, 2008), and polydimethylsiloxane-polyurea copolymers dissolved in isopropyl alcohol (Yilgor, Ward, Yilgor, & Atilla, 2006). It is also generally accepted, for hydrocolloids, that the relation of k H + k K = 0.5 would indicate the adequacy of the experimental results.…”

Intrinsic viscosity of bovine serum albumin conformers

“…For example, ref. [29] shows this same behavior in a solution in which the solute is amphyphilic. The co-polymer is composed of flexible, non-polar polydimethylsyloxane blocks and polar polyurethane blocks.…”