SYNTHESIS AND PROPERTIES OF NEW POLY(ETHER SULFONE)AMIDES

High molecular-weight aromatic polyamides were obtained from 1,5- and bis-(4'-carboxy-4-phenylenoxy-sulfonyl)naphthalene by direct polyconde nsation reaction in N-methyl-2-pyrrolidone with various aromatic diami nes, using triphenyl phosphite and pyridine as condensing agents. The polymers were characterized by elemental analysis, thermogravimetric a nalysis, differential scanning calorimetry, and infrared analysis. The polyamides, obtained in quantitative yield, possessed inherent viscos ities in the range 0.42-1.70 dL/g, glass transition temperatures betwe en 245-310 degrees C, and 10% weight loss temperatures in nitrogen and air above 435 and 424 degrees C, respectively. Most of the polymers w ere soluble in aprotic solvents. The effect of the structure on proper ties, such as solubility, T-g, and thermal behavior, were also studied . (C) 1996 John Wiley & Sons, Inc.