Novel Thermotropic Polyesteramides

Abstract

A series of wholly aromatic, para-linked, thermotropic polyesteramides has been synthesized from various aminophenols, 2-trifluoromethyl terephthalic acid, and 2,2′-trifluoromethyl-4,4′-biphenyl dicarboxylic acid. The polymers exhibit good solubility and, in most cases, low mesophase transition temperatures. Oriented films of these materials show a high degree of optical anisotropy. The infrared dichroic behavior of the amide carbonyl was used to calculate orientation as well as a new value for the angle of the ester carbonyl vibrational transition moment.