MODELING THE ADSORPTION FROM SOLUTIONS OF POLYMER BLENDS UNDER THE CONDITIONS OF PHASE-SEPARATION

Adsorption from single-phase solutions of polymer blends was studied f or an initial solution modeling a ternary two-phase system separated b y increase of concentration. The studies were performed for a model sy stem polystyrene-poly(butyl methacrylate)-carbon tetrachloride-aerosil at concentrations higher than the critical concentrations of coil ove rlapping for each polymer. The phase diagram for the ternary system un der study was obtained by the method of phase equilibria. It is shown that adsorption from single-phase solutions before phase separation an d from single-phase solutions modeling separated ternary two-phase sys tem proceeds in a similar way. In single-phase solutions of polymer bl ends modeling the upper and lower phases, adsorption proceeds simultan eously from both phases, which results in a higher amount of adsorbed poly(butyl methacrylate).