SYNTHESIS AND CHARACTERIZATION OF POLYESTERS CONTAINING SULFIDE, SULFONE OR CARBONYL GROUPS IN THEIR BACKBONES

Novel polyesters containing sulphide, sulphone and carbonyl groups are reported. Three diacids were prepared through several steps from 1,4- bis(p-phenylthio)benzene, bis(p-phenylthio)-diphenyl sulphone and bis( p-phenylthio)-benzophenone. Three model diesters (MDE-1,2,3) were prep ared. The model compounds and the polyesters were obtained in high yie lds by direct polycondensation of acids with some aromatic diols in th ionyl chloride and pyridine system at 80-85-degrees. All the polyester s were characterized by spectral, analytical and thermal methods; the morphology (XRD), solution viscosity, density and solubility were also studied.