Abstract
Novel poly(amide ether)s were synthesized from aminophenyl-terminated oxyethylene oligomers and terephthaloyl chloride or 4,4′-biphenyldicarboxylic acid dichloride. The polymers were produced in high yield and high molecular weight (ηinh = 0.8–1.9 dl/g), and were characterized by elemental analyses, NMR spectroscopy and viscosity measurements. They showed low solubility in organic solvents, and a remarkable ability to develop high crystallinity, with melting temperatures in the range 300–370°C. Polymers containing biphenylene units formed stable mesophases (smectic) upon melting, as revealed by calorimetry, optical microscopy and X-ray diffraction.
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