The surface tension of poly(acrylic acid) in aqueous solution

Interaction between pentaethylene glycol n-octyl ether and low-molecular-weight poly(acrylic acid)

“…The ternary system water-C 8 E 5 -PAA presents a quite similar γ trend, though at low m the data relative to the ternary system are slightly lower than those relative to the binary system; this difference, which is due to the surface Table 2 Critical surfactant concentrations in the binary system water-C 8 E 5 and in the ternary system water-C 8 E 5 -PAA (0.1% w/w) a Water-C 8 E 5 Water-C 8 E 5 -PAA (0.1% w/w) cmc × 10 3 (mol kg −1 ) T 1 × 10 3 (mol kg −1 ) T 2 × 10 3 (mol kg −1 ) Spectrofluorimetry activity of the polymer [27], tends to decrease with increasing m. Only a very slight slope change at T 1 ≈ 3.3 × 10 −3 mol kg −1 is detectable, which could probably be related to the onset of the cooperative surfactant-polymer interaction. Also, in the ternary system, the only plateau is reached in correspondence with the free micelle formation (T 2 = 7.4 × 10 −3 mol kg −1 ).…”

Surface Tension of Biological Polyelectrolyte Solutions

“…Their molecular weight and size are reported to be 69,000 and 150 ϫ 38 ϫ 38 Å 3 , much large and more anisotropic compared with LZ. Figure 7a shows the ␥ values of BSA in the presence of sodium chloride and in its absence.…”

“…Generally speaking, chemical structures, charge distributions and other structural informations of synthetic polyelectrolytes are known more in detail compared with the biological polyelectrolytes. Several researchers have reported surface activities of poly(methacrylic acid) (HPMA) (1), sodium polyacrylate (NaPAA) (2)(3)(4), and other hydrophobic polyelectrolytes (5)(6)(7)(8).…”

Pollen-Mimetic Multiphase Polymer Microparticles

“…Poly(acrylic acid), on the other hand, does not significantly reduce surface tension at neutral pH, because the acrylic acid groups are depronotated, and the reported values for surface tension are around 71 mN/m [24].…”