New Structures of Bismaleimides and Polyaspartimides with Ether Units

New bismaleimide monomers with various structures, synthesized by the reaction of maleic anhydride and new diamines, were used in the reaction with diamines to yield polyaspartimides. The structure of these monomers was confirmed by Fourier transform infrared (FT-IR) and proton nuclear magnetic resonance (¹H-NMR) spectroscopy, and polymer structure was evidenced by FT-IR spectroscopy. The resulting new compounds were characterized by differential scanning calorimetry (DSC) and thermogravimetry (TGA). The polymers exhibited film-forming ability. The quality of these films was studied by atomic force microscopy (AFM), and their mechanical properties (tensile strength, tensile modulus) were investigated.