Concentration Dependence of the Viscosity of Dilute Polymer Solutions: Huggins and Schulz‐Blaschke Constants

Newtonian viscosity behavior of dilute solutions of polymerized whey proteins. Would viscosity measurements reveal more detailed molecular properties?

“…We also notice that k H decreases as temperature increases. The increase or decrease of k H values within the range of flexible polymer chains has been an issue of contradiction (Schoff, 1999). It has been mentioned that as k H decreases, solvent goodness increases (Schoff, 1999).…”

“…The increase or decrease of k H values within the range of flexible polymer chains has been an issue of contradiction (Schoff, 1999). It has been mentioned that as k H decreases, solvent goodness increases (Schoff, 1999). However, on the same time, we cannot rule out the effect of molecular size in polymers that associate in solution, either by the effect of strong ionic or polar interactions, or by the effect of hydrogen bonds (Doit, 1988), where dissociation has been shown to decrease the value of k H .…”

Viscometric study of chitosan solutions in acetic acid/sodium acetate and acetic acid/sodium chloride

“…We also performed a test using Eq. (3), from Shulz-Blasche (SB), in this case attributing the value of 0.28 to the respective constant (k SB ) (Abdel-Azim et al, 1998;Delpech & Oliveira, 2005;Delpech et al, 2002aDelpech et al, , 2002bKhan et al, 1983;Schoff, 1999).…”

“…However, as shown in (Table 1). Table 3 presents the percentage differences ( %) calculated for the intrinsic viscosity values obtained from the equations of Kraemer, Schulz-Blascke, Solomon-Ciuta and Deb-Chanterjee, when compared with those produced by the equation of Huggins, i.e., how much these former values deviated from the base value, chosen from Huggins' equation, most often used for these calculations (Abdel-Azim et al, 1998;Delpech et al, 2007Delpech et al, , 2002aDelpech et al, , 2002bDelpech & Oliveira, 2005;Mello et al, 2006Mello et al, , 2005Khan et al, 1983;Schoff, 1999).…”

“…Eq. (3) (Shulz-Blaschke) also is widely used for single-point determination, using the fixed value of 0.28 for k SB , which according to the literature is adequate for many polymer-solvent-temperature systems (AbdelAzim, Atta, Farahat, & Boutros, 1998;Delpech et al, 2007Delpech et al, , 2002aDelpech et al, , 2002bDelpech & Oliveira, 2005;Khan, Gupta, & Bhargava, 1983;Mello et al, 2005Mello et al, , 2006Schoff, 1999;Silva et al, 2013).…”