Abstract
Two new bismaleimides with preforming ester and amide linkages in the main chain were prepared by the reaction between the chloride of 4-maleimidobenzoic acid and 4 (5) amino- salicylic acid. The structures were characterized by elemental analysis, infrared (IR) and proton nuclear magnetic resonance (1H-NMR) spectroscopy and thermogravimetric analysis. Keywords: bismaleimides, polyimides, thermal stability