The thermotropic liquid crystalline behaviour of a series of aliphatic-aromatic poly(ether ester amide)s, which were prepared by direct polycondensation, was observed. Poly (ether ester amide)s I were prepared from 4,4'-diacrylic acid-ct,co-diphenoxyalkanes and 4-aminophenol or 4-amino-3-methylphenol in the presence of diphenylchlorophosphate (DPCP) and pyridine. Poly(ether ester amide)s II were prepared from 4,4'-dicarboxy-ct,~o-diphenoxyalkanes and 4-aminophenol or 4-amino-3-methylphenol in the presence of DPCP and pyridine. The phase behaviour of the polymers was studied by differential scanning calorimetry and optical polarizing microscopy equipped with a heating stage. Poly(ether ester amide)s I exhibit thermotropic liquid crystalline characteristics, except in cases where methoxy or ethoxy groups were introduced into the benzene ring. All of the poly (ether ester amide ) s II exhibit thermotropic liquid crystalline behaviour as observed by optical polarizing microscopy
Посилання на статтю:
Studies on thermotropic liquid crystalline polymers: 4. Synthesis and properties of poly (ether ester amide) s / Ay-Ling Liang // Polymer. – 1992. – Vol 33. – P. 2217-2221.
