SYNTHESIS AND PROPERTIES OF POLYAMIDES DERIVED FROM 1,4-BIS(4-AMINOPHENOXY)-2-TERT-BUTYLBENZENE

1,4-Bis(4-aminophenoxy)-2-tert-butylbenz was synthesized and used as a monomer to prepare a series of polyamides by the direct polycondensat ion with various aromatic dicarboxylic acids in N-methyl-2pyrrolidone using triphenyl phosphite and pyridine as condensing agents. All the p olymers were obtained in quantitative yields with inherent viscosities of 0.75 - 1.75 dL g(-1). All the polyamides showed amorphous nature a nd most of them were soluble in polar solvents. Polyamides derived fro m 4,4'-sulfonyldibenzoic acid and 4,4'-hexafluoroisopropylidenedibenzo ic acid were even soluble in common organic solvent such as THF. All p olyamide films could be obtained by casting from their DMAc or NMP sol utions. The polyamide films had a tensile strength range of 35 - 84 MP a, an elongation range at break of 3 - 7 %, and a tensile modulus rang e of 1.2 - 2.5 GPa. These polyamides had glass transition temperatures between 203 - 268 degrees C and 10 % mass loss temperatures were reco rded in the range of 456 - 472 degrees C in nitrogen and 453 - 470 deg rees C in air atmosphere.