A new viscometric approach to the interpolymer complexes

pH and salt effects on interpolymer complexation via hydrogen bonding in aqueous solutions

“…Sivadasan and co‐workers18 found that an increase in ionic strength leads to a decrease of pH at which the interpolymer interaction begins between PAA and pyrene‐modified poly(acrylamide). Staikos and co‐workers19 showed that the presence of sodium bromide in solution favours the formation of a compact polycomplex between PAA and PEO.…”

Complex formation between poly(vinyl ether) of ethylene glycol and poly(acrylic acid) in aqueous and organic solutions

“…Recently Frenkel's group have reported that increasing of ionic strength depresses the complexation of PAA with poly(vinyl alcohol) 12) and oxyethylcellulose 13) . But according to other authors 14,15) the increasing of ionic strength is favorable for complex formation. We have checked the influence of ionic strength on the complex formation of PAA with PVEEG (Fig.…”

Effect of ionic strength of the solution of some hydrogen - bonded interpolymer complexes on the stability and thermodynamic parameters

“…The balance between these two opposite factors will determine how a system will respond to the presence of low molecular weight ions in solution [15]. Prevysh et al [20], Frenkel [19], Turro [18], Staikos [38] and Iliopoulos with coworkers and -in a series of papers during recent years -Nurkeeva et al [22][23][24][25][26][27] have described how an addition of inorganic salts could influence the pH crit , and stability of interpolymer complex significantly, and that this effect was greatly dependent on the nature of the non-ionic polymer. They found that for complexes of PAA with PVP, HPC, poly(vinyl methyl ether) (PVME), poly(acrylamide) (PAAm) the decrease in pH crit was observed in the following order: NaCl > KCl > NH 4 Cl.…”