Alternating, block, and random copolymers of the rigid moiety terephthaloyl bis(4-oxybenzoyl) (Triad) with-either ethylene terephthalate (ET) or butylene terephthalate (BT) flexible units were prepared by polycondensation in solution. The Triad mesogen was incorporated using either terephthaloyl bis(4-oxybenzoyl chloride) (TOBC) or alpha,omega-bis[(4-hydroxybenzoyl)oxy]butane (T4). Use of the latter monomer resulted in the formation of terephthaloyl (4-oxybenzoyl) (Diad) moieties in the copolymer. The block copolymers exhibited nematic liquid crystalline texture, whereas the behavior of the random and alternating copolymers depended on the flexible alkylene terephthalate content and method of synthesis.