THE PREPARATION BY A SOLID-SOLID INTERACTION ROUTE OF AROMATIC POLYAMIDE MATERIALS CONTAINING SULFONE, ETHER AND KETONE LINKAGES

The polycondensation reactions between 4,4'-[sulphonyl bis(p-benzoyl)( p-phenyleneoxy)]dibenzoic acid (I) and p-phenylenediamine (II), 1,5-di aminonaphthalene (III), 4,4'-sulphonyldianiline (IV), 4,4'-diaminodiph enylsulphide (V) 4,4'-methylenedianiline (VI) and 4,4'-oxydianiline (V II) to form aromatic polyamides containing sulphone, ether and ketone linkages were attempted by a solid-solid interaction route. A stoichio metric 1:1 molar ratio of solid reactants was dynamically heated direc tly in a TG/DSC apparatus, and simultaneous TG/FT-IR was performed to interpret the mechanism of reaction. The results suggest that the poly condensation is dependent on the diamine used. The formation of polyam ide was successful when I interacted with II, III, VI and VII. The int eraction with IV and V was in part successful because partial decarbox ylation of the diacid, made unstable by the diamine, occurred before t he condensation reaction.