The Synthesis of Polyesters Containing Pyridine Ring in Main Chains

Abstract

The preparation and properties of polyesters from 2, 6-dimethylol pyridine with aliphatic dicarboxylic acids and pyridine dicarboxylic acid derivatives with diols by melt or interfacial polycondensation have been studied. Polyesters from 2, 6-dimethylol pyridine with dimethylesters of aliphatic dicarboxylic acids were prepared by melt polycondensation. Polyesters from dimethyl isocinchomeronate, diphenyl isocinchomeronate, or 2, 6-dimethyl-3, 5-dicarbobethoxy pyridine with diols were prepared by melt polycondensation. All-aromatic polyesters were prepared from three kinds of pyridine dicarboxylic acid dichlorides with aromatic diols by interfacial polycondensation. The physical properties of these polyesters prepared, such as melting point, solution viscosity, melt spinnable property, and solubility, were measured. The all-aromatic polyesters prepared by interfacial polycondensation had high solution viscosity and rather high melting point, which is above 300°C.