The synthesis and thermal stability of thioether dianhydride poly(amic acid)

Thioether dianhydride, 2,2'-{4-[(4-nitrophenyl)azo]imino) bis ethylamine(di amine monomer) were synthesized and characterized. Due to this chromophore molecule(diamine nonomer) have further polymerizable amino groups on one en d of the molecule, the corresponding poly(amic acid) formed with thioether dianhydride exhibited a good solubility in common organic solvents, Decompo sing temperature of the diamine chromophore in the poly(amic acid) and poly imide backbone are T-d = 362 degrees C and 491 degrees C, respectively. The se polymers are currently showing interesting potential in highly sensitive , nonlinear optical materials.