Fddd Phase Boundary of Polystyrene-block-polyisoprene Diblock Copolymer Melts in the Polystyrene-Rich Region

We investigated the Fddd phase in the polystyrene (PS) rich region or fPI 0.5 in terms of fPI and χN. The asymmetry of the Fddd region between PS-rich and PI-rich region can be explained by the conformational asymmetry between PS and PI chains.

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