Noncentrosymmetric Lamellar Phase in ABCD Tetrablock Copolymers

The phase behavior of ABCD tetrablock copolymer melts is studied using self-consistent mean-field theory. In particular, the noncentrosymmetric (NCS) lamellar phase (with sequence ...ABCDABCD...) and the centrosymmetric (CS) lamellar phase (...ABCDDCBA...) are examined in two cases. First, an enthalpically stabilized NCS lamellar phase is investigated by varying the interaction between the A and D blocks from repulsive to attractive while …