PENDANT FUNCTIONAL-GROUP COPOLYETHER SULFONES .1. SYNTHESIS AND CHARACTERIZATION OF NEW COPOLYETHER SULFONES WITH PENDANT ALDEHYDE GROUPS MODIFIED INTO PHENOLIC AZOMETHINE GROUPS

New functional copolyether sulfones with pendant aldehyde groups were synthesized by the classical polycondensation reaction between 4,4' -d ichlorodiphenyl sulfone (I) and various bisphenols such as 5,5'-methyl ene bis-salicylaldehyde (II-2), 2,2-bis( 4-hydroxyphenyl)propane (III) , and 2,6-bis(4-hydroxybenzylidene)cyclohexanone (IV). Condensation re action with 4-aminophenol led to pendant phenolic azomethine groups co ntaining copolyether sulfones. The structures of the resulting polymer s were confirmed by IR, H-1-NMR spectra, and elemental analyses. The p olymers were characterized by reduced viscosity, solubility, thermal s tability, DSC, and x-ray diffraction measurements.