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Surface instabilities of minority chains in dense polymer brushes: a comparison of density functional theory and quasi-off-lattice self-consistent field theory.

This work studies surface instabilities in switchable homopolymer brushes where the minority chain differs in length from the brush chains. Both off-lattice numerical self-consistent field theory and classical density functional theory are employed. It is found that the two methods agree well with each other as long as the same equation of state for the polymer chains is used.