Thermooxidative stability of some polyimides

Abstract

Different polyimide resin types were synthesized using N,N′-4,4′-bis-maleimidodiphenylmethane and five structurally different diamines. The molecular structure characteristics of used compounds were obtained by computer analysis. In addition to the previous paper, 1 in which the thermal stability was studied in nitrogen atmosphere, the thermogravimetric characterization was performed in oxygen in order to define the thermooxidative stability of synthesized resins. The results have shown somewhat different order of thermooxidative stability compared to the findings in nitrogen atmosphere. The difference was attributed to the different structural characteristics of the studied samples.