SURFACTANT-POLYMER INTERACTIONS AND THEIR EFFECTS ON THE MICELLAR INHIBITION OF THE NEUTRAL HYDROLYSIS OF 1-BENZOYL-1,2,4-TRIAZOLE.

Article abstract of DOI:10.1021/ja00321a024

Binding of sodium dodecyl sulfate (SDS) to atactic poly(N-vinylpyrrolidone) (PVP) has been studied by conductivity measurements. It is proposed that in addition to normal micelles of SDS an additional pseudophase of mixed micelles of PVP and SDS is present in solution. The effect of polymer-surfactant binding on the catalytic/inhibitive activity of SDS micelles has been investigated by studying the rates of the pH-independent hydrolysis of 1-benzoyl-1,2,4-triazole (1). Though the polymer itself has no effect on the hydrolysis reaction in water, addition of PVP to SDS solutions decreases the micellar inhibition, and pseudo-first-order rate constants (k//o//b//s//d) are higher than those in the absence of PVP. Ultrafiltration experiments using a model substrate indicate increased solubility of the substrate in the micellar pseudophase upon addition of PVP.