Elongational Flow of Solutions Containing Poly(ethylene oxide)/Sodium Dodecyl Sulfate Complexes in the Presence of n-Alkanols

Effect of ionic strength on the rheological behavior of aqueous cetyltrimethylammonium p-toluene sulfonate solutions

“…The resulting flow field has a stagnation point on the symmetry plane, and it resembles uniaxial extension in a region around the stagnation point. The experimental setup and flow field characteristics are described in detail elsewhere [44]. The pressure drop of the liquid flowing through the jets is measured as a function of the apparent strain rate in the extensional flow field, calculated by…”

Elongational Flow of Solutions of Poly(ethylene oxide) and Sulfonated Surfactants

“…Specific details about the experimental apparatus have been reported in previous works (8,30). Two different sets of opposed capillaries were used.…”

Synthesis and rheological properties of hydrophobically modified polyacrylamides with lateral chains of poly(propylene oxide) oligomers

“…The binding mechanism between SDS and PPO (or PEO) could be described as follows: As the concentration of SDS in the solution increases, surfactant aggregates are formed along the polymer chains at a concentration CAC < CMC by means of hydrophobic interactions (a part of the chain penetrates into the aggregate) [27][28][29]32,[56][57][58][59]61]. The dehydration of PPO segments, which induces the cooperative binding of SDS monomers onto the PPO segments and formation of mixed micelles at SDS concentrations lower than the CMC, is a process commonly referred to as polymer-induced micellization.…”

“…At fixed polymer concentration, higher hydrophobe content leads to solutions with higher viscosity at higher surfactant concentrations. In the field of polymer/surfactant mixtures, the interactions between PEO and sodium dodecyl sulfate (SDS) have been extensively studied [27,32,[56][57][58][59][60][61]. Due to its amphiphilic character, PEO could either be solubilized into the hydrophobic core of SDS mixed micelles or partitioned close to the charged surface of SDS micelles through ion-dipole interaction to form a necklace-like structure [32].…”