Abstract
The rate of adsorption and desorption of polystyrene (PS) from decalin onto silica is measured. The adsorbed mass as a function of time is monitored by means of optical reflectometry, and mass transfer through the solution is controlled by means of an impinging jet geometry. It is found that the initial rate of adsorption is entirely controlled by mass transfer, attachment being a fast step on the time scale of the experiment. This result agrees with previous findings for the system poly(ethylene oxide)/ water/silica. However, at higher coverage the rate of adsorption slows down gradually and for long chains becomes quite slow. By varying the concentration in solution, it could be shown that the rate of adsorption in this regime remains proportional to the bulk concentration
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