High-temperature polycondensation of six membered dianhydrides with o-substituted aromatic diamines. 1. Model compounds investigations

Abstract The high-temperature condensation of 4-benzoyl-1,8-naphthalene anhydride with 2,6-dimethylaniline and o -phenylenediamine was investigated. The structures of the compounds obtained were determined using FT-IR, UV–VIS, 13 C NMR, DSC and MS. The directions of reactivities of intermediate isoimides and imides were investigated.