Pressure-Induced Enantiotropic Transition of a Thermotropic Polyester at Room Temperature

Abstract
An enantiotropic transition between crystal and amorphous phases of a thermotropic liquid crystalline polyester, poly(4,4′-dioxy-2,2′-dimethylazoxybenzene dodecanedioyl) (labeled as DDA-9), was found to be induced at room temperature by hydrostatic pressure. The pressure-induced enantiotropic transition is greatly de-pendent upon the original solid state of DDA-9.