Preliminary communication Lyotropic mesomorphism of AB block copolymers in a nematic solvent

A lyotropic hexagonal mesophase is identified in a mixture of a low molecular mass nematic solvent and an AB block copolymer with a liquid crystalline block A and an isotropic block B by polarizing microscopy. A highly ordered striated texture evolves spontaneously that exhibits an additional striated fine structure within the stripe domains.