| abstract |
An aromatic polyester carbonate comprising structural units represented by the following formulae (A), (B), (C), and (D) and satisfying the following relationship when the mole fractions of the structural units represented by the formulae (A), (B), (C), and (D) are defined as a, b, c, and d, respectively: ##EQU1## and having an inherent viscosity [η inh ] in a solution at a concentration of 0.5 g/dl in p-chlorophenol as a solvent at 50° C. of 1.0 dl/g or higher, or being insoluble in the solvent, and having liquid crystal properties ##STR1## wherein R is the same or different and represent an alkyl, phenyl group or a halogen, and n represents an integer of 0 to 4; ##STR2## X 1 represents a substituted or non-substituted phenyl group, an alkyl group having 3 to 6 carbon atoms or a halogen; n X 2 represents --O--, --S--, ##STR3## or --CH 2 --; X 3 may be the same or different and represents an alkyl group, phenyl group, or a halogen; and m represents an integer of 0 to 4. |