NEW AROMATIC POLYAMIDE MATERIALS CONTAINING SULFONE, ETHER AND KETONELINKAGES

Several aromatic polyamides were prepared from 4,4'-[sulfonyl bis(p-be nzoyl)(p-phenyleneoxy)]dibenzoic acid with various diamines by the pho sphorylation route. The polymers were characterized by elemental analy sis, thermogravimetric analysis, differential scanning calorimetry and infra-red analysis. The polyamides, obtained in quantitative yield, p ossessed inherent viscosities in the range 0.3-1 dlg(-1) and 10% weigh t loss in nitrogen and air were above 460 and 440 degrees C, respectiv ely. Most of the polymers were soluble in aprotic solvents. The effect of the structure on properties such as solubility and thermal behavio ur were also studied. Copyright (C) 1996 Elsevier Science Ltd.