We investigate the formation of ultrathin layers of a diblock copolymer polystyrene (PS)/poly(2-vinylpyridine) (P2VP) adsorbed from a dilute solution by means of a surface forces apparatus. A simple model, that takes into account the thickness of the P2VP layer and the osmotic pressure within the PS layer, is used to analyze the force−distance curves. An absolute value of surface coverage is determined by comparison with AFM measurements. The volume fraction of P2VP in the anchoring layer is calculated and does not display noticeable change with the incubation time. In addition, the surface coverage variation with the incubation time is compared with theoretical models.
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Pelletier et al. (1997) studied this question.
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