The preparation of oriented morphologies of the thermotropic aromatic copolyester of poly(ethylene terephthalate) and 80 mole percent p‐acetoxybenzoic acid

Highly oriented morphologies of poly(ethylene terephthalate) and 80 mole percent p‐acetoxybenzoic acid were prepared by shearing in an optical plate‐plate rheometer and by melt fiber drawing in a temperature range at which the copolyester was either in the semicrystalline state or liquid crystalline phase. The optical, thermal, and mechanical properties of the oriented films and drawn fibers depended significantly on the processing temperature.