The decreases of the exchange micellar rate constant, determined from stopped flow kinetic study, and of the sticky parameter, determined by small angle X-ray scattering, with the water volume fraction are strongly correlated. This phenomenon is explained according to the contact value of the micelle-micelle correlation function and the surfactant monolayer rigidity. It is shown that the attractive interactions govern the decrease of the exchange process with the increase in the number of droplets.