Structure‐property relationships of isomeric addition polyimides containing nadimide end groups

Abstract Addition polyirnide oligomers with nadimide end groups (I) have been synthesized from 4,4′‐oxydiphthalic anhydride and 3,3′,4,4′‐benzophenone tetracarboxylic acid dianhydride with several isomeric diamines and, nadic anhydride. The low molecular weight amic acid? and corresponding imides were isolated and characterized. Solubility and melt‐flow properties of the imide prepolymers were studied to determine the applicability of the resins as adhesives and composite matrices. Thermomechanical transitions of the polymers were obtained by torsional braid analysis. Properties were compared with a similar addition polymer, P13N. magnified image