Sulphur-containing polyarylenequinodiimides

Different synthetic approaches have been used for preparing some new polymers relating to sulphur‐containing polyarylenequinodiimides. The latter have been obtained both from quinodi‐imidedichloride and aromatic dithioles and directly from 1,4‐phenylenediamine and disulphenylchlorides. The mechanism of this process has been proposed on the basis of studying a model reaction of phenylsulphenylchloride with 1,4‐phenylenediamine. Polyarylenesulphonequinodi‐imides have been obtained by selective oxidation of polyarylenesulphoneamides with phenyliodozoacetate. Their structure has been proved by IR, PMR, and 13C‐NMR spectroscopies. Electrophysical properties of synthesized polymers have been studied.