Interaction of a cationic surfactant to sodium polyphosphates with different degrees of polymerization

Amperometric method for determining the degree of complexation of polyelectrolytes with cationic surfactants

“…Also, the slope of the isotherm becomes less steep with decreasing polymer chain length, which is seen as decreasing values of w in our work. Similar results have previously been obtained for a binding of relatively lowmolecular-weight polyphosphate and polyaspartate with alkylpyridinium chlorides [17,18]. However, in these works the effect of the polymer size is not included in the cooperativity parameter, which is assumed to be a function of the hydrophobic interaction only, and thus w is assumed to remain the same for all polymer sizes under study.…”

Poly(allylamine)/tripolyphosphate coacervates enable high loading and multiple-month release of weakly amphiphilic anionic drugs: an in vitro study with ibuprofen

“…Besides tailoring the PAH concentration, PAH/TPP coacervates can be prepared using different PAH molecular weights (data not shown). Since surfactant/polyelectrolyte binding (which enables the high ibuprofen uptake), however, is only sensitive to polyelectrolyte molecular weight when the polymer chains are very short (with degrees of polymerization well below 100), 47,48 variations in PAH chain length are not expected to strongly affect uptake performance. In other words, the high LCvalues obtained herein can likely be achieved using an array of PAH molecular weights.…”

Association Behavior and Ordered Nanoaggregation of Charged Fullerene Derivatives and Cationic Surfactants in Solution

“…As expected, K decreases with increasing ionic strength. 15, 16,21,22,27,28 The fitting of values below the charge equivalence point for DPC/NaFHM/NaCl yielded the solid lines in Figure 1 and u and K parameters as reported out of brackets in Table 1. A satisfactory agreement between calculated and experimental Figure 1 surfactant…”