This thesis is focused on the synthesis and the characterization of a polyimine based on vanillin derivative. As illustrated in Figure 1, vanillin reacted with 4,4'-oxydianiline (ODA) to produce the intermediate monomer, V-ODA (vanilline-4,4'-oxydianiline), which was subsequently used for polymer synthesis. In this reaction the ethanol was used as the solvent and the reaction take 6 hours at 80°C, finally the V-ODA separated by filtration and left to dry for 24 hours. The structure of V-ODA confirmed by 1H NMR and FTIR analyses. Thermogravimetri analysis (TGA) showed good thermal stability, and Differential Scanning Calorimetry (DSC) confirmed the absence of residual solvent.