Quantitative correlation between counterion (X) binding affinity to cationic micelles and X – Induced micellar growth for substituted iodobenzoates (X)

A new semi-empirical kinetic (SEK) method has been used to calculate the values of K X Br or R X Br (X represents substituted iodobenzoates), with K X and K Br representing CTABr micellar binding constants of counterions X − (in the presence of either spherical or non-spherical micelles) and Br − (in the presence of only spherical micelles), respectively. Steady-shear rheological properties of mixed 0.015 M CTABr/[MX] aqueous solutions reveal the presence of flexible wormlike micelles where MX represents sodium 3- and 4-iodobenzoates. The maxima of the plots of viscosity vs . [MX] at 0.015 M CTABr for MX representing sodium 3- and 4-iodobenzoates support the presence of long linear and entangled wormlike micelles.