Investigation of polyimides containing naphthalene units: 1. Monomer structure and reaction conditions

A series of novel polyimides with naphthalene units in the chain has been synthesized. The polyimides were prepared from 1,3- and 1,4-bis(1,8-dicarboyxlic anhydride-4-naphthaloyl)benzene (III) and six diamines in m-cresol in the presence of various catalysts. The influence of monomer structure and the reaction conditions on polymer properties were investigated.