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New optically active aromatic poly(amide-imide)s (PAIs) were prepared from newly synthesized N,N΄-(bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracrboxylic)-bis-Lvaline diacid (4) via polycondensation with various aromatic diamines. The diacid (4) was synthesized by the condensation reaction of bicyclo[2,2,2]oct-7-ene- 2,3,5,6-tetracarboxylic dianhydride (1) with L-valine (2) in acetic acid. All polymers were obtained in quantitative (high) yields with inherent viscosities of 0.24-0.36 dL/g. All of these polymers were highly organosoluble in solvents like N-methyl-2- pyrrolidone (NMP), dimethylformamide (DMF), N,N'-dimethylacetamide (DMAc) and dimethylsulfoxide (DMSO) at room temperature and were fully characterized by means of NMR spectroscopy, FTIR spectroscopy, elemental analyses, inherent viscosity, solubility test, specific rotation and thermal properties of the poly(amideimide) s were investigated using TGA/DTG.

e-polymers

New optically active poly(amide-imide)s from N,N΄- (bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracrboxylic)-bis-L-valine diacid and aromatic diamines: synthesis and properties