Novel Thermally Stable Arylene Sulphone Ether Poly(amide-imide)

Nucleophilic aromatic substitution reaction of 5-amino-t-naphthol and also 4-aminophenol with bis(4-chlorophenyl)sulphone in N-methyl-2-pyrrolidone as solvent in the presence of K2CO3 resulted in prepara-tion of two aromatic sulphone ether diamines. Polycondensation reaction of the prepared diamines with 4-chloroformylphthalic anhydride yielded thermally stable poly(sulphone ether amide-imide)s. The prepared polymers were characterized by conven-tional methods. Physical and mechanical properties of polymer including thermal behaviour, thermal stability, solution behaviour, solution viscosity, and modulus were studied. According to the obtained results, the prepared poly-(sulphone ether amide-imide)s showed physical and thermal properties that lied between corresponding poly(sulphone ether amide)s and poly(sulphone imides. This was an important aspect of structure-property relationships. Key Words: sulphone ether diamine, nucleophilic aromatic substitution, poly(sulphone ether amide-imide), thermally stabl