ADSORPTION-KINETICS OF AMPHIPATHIC POLYSTYRENE-BLOCK-POLYBUTADIENE ONTO SILICON-WAFER AND POLYSTYRENE PLANAR SURFACES

Adsorption kinetics of amphipathic diblock AB copolymers of polystyren e-block-poly butadiene from selective solvent onto planar silicon wafe r and polystyrene surfaces have been studied by ellipsometry. A theore tical analysis of the adsorption kinetics was applied to investigate t he adsorbed layer thickness, the total amount adsorbed at each concent ration, and the area occupied by each copolymer chain. Some insight in to the architecture of the buoy in the solution is presented. In these studies we found a strong dependence of adsorption rate on the chemic al nature of the substrates and on the bulk concentration of the adsor bent. Further, the kinetics of adsorption at different concentrations and temperatures suggest that both single polymer molecules and micell es are responsible for adsorption.