Citation: WANG Shanger, MO Zhishen, ZHANG Hongfang, FENG Zhiliu. SYNTHESIS AND CHARACTERIZATION OF THERMOTROPIC COPOLYESTERS AND COPOLY (ESTER-AMIDE)S CONTAINING OXYETHYLENE-ETHER AS THE SPACER*[J]. Chinese Journal of Polymer Science, ;1995, 13(4): 353-360. shu

SYNTHESIS AND CHARACTERIZATION OF THERMOTROPIC COPOLYESTERS AND COPOLY (ESTER-AMIDE)S CONTAINING OXYETHYLENE-ETHER AS THE SPACER*

Received Date: 24 August 1994

Flexible oxyethylene-ether was introduced into the aromatic copolyesters and copoly(es-ter-amide)s to reduce the melting point of resulting polymers. The melting point was greatlyreduced to 200℃ or even lower in some cases, and the molecular weight was satisfactorilyhigh as reflected by inherent viscosity. The polymers exhibited high thermal stability and goodmechanical properties as determined by TGA and mechanical tests. The copolyester showedbetter crystallinity and liquid crystallinity than corresponding copoly(ester-amide)s with similar monomer composition as reflected by POM observation and WAXD study.The melting points for both copolyesters and copoly(seter-amide)s showed great dependence on the pacetoxybenzoic acid(PAB) content in monomer composition and reached the lowest value when PAB was 29 mol%.
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