AbstractA group of copolyamide‐imides and copolyester‐imides completely ordered has been obtained by the reaction of aliphatic and aromatic diamines with symmetrical monomers possessing reactive imide group.The aromatic diimide‐amide and diimide‐ester monomers were prepared by means of the reaction of acidolysis between trimellitic acid imide and acetoxy derivative of aromatic diamines and diphenols.The diimide‐ester monomers with aliphatic substitutes were obtained by ester interchange between glycols and the methyl ester of trimellitimide.The polymerization reactions were carried out in a solution of polar solvents and the solated polymers were characterized with the object of estabilishing a relation between the properties and the structure of each one.