We have studied the thin film morphologies of polystyrene-b-poly(2-vinylpyridine) diblock
copolymers and polystyrene-b-poly(2-vinylpyridine)-b-poly(tert-butyl methacrylate) triblock copolymers
after “annealing” in the vapor of different solvents. We find distinct differences in the resulting thin film
morphologies. The differences are explained qualitatively on the basis of concentration-dependent Flory−Huggins interaction parameters of the different components.
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