Diffusion and equilibrium binding of methyl red in toluene solutions of polystyrene/poly(methyl methacrylate): Mixture vs random copolymer

The equilibrium binding of p-MR in polymer solutions was studied. Using a toluene solution of p-MR as the size exclusion tomography (SEC) eluent, it was possible to extract the information on equilibrium binding of p-MR onto PS/PMMA mixtures and PS-PMMA random copolymers from the SEC experiments. Such information is difficult to obtain with the use of conventional equilibrium binding methods.