Polyhydroxyesterimides from Renewable Resources: Synthesis, Characterization, Properties

Novel polyhydroxyesterimides were prepared by the reaction between diglycidyl monomers and diimidodiacids at the molar ratio 1/1 in the presence of triethylbenzylamonim chloride as catalyst. Diimidodiacids (DIMDA) were obtained from Diels-Alder adduct of resin acids with maleic anhydride and two aromatic diamines, at the molar ratio 1:2. The chemical reactions between the diglycidyl monomers (diglycidylether of bisphenol A -DGEBA and diglycidyl ether of hydroquinone-DGEHQ) and diimidodiacids were monitored by using differential scanning calorimetry (DSC). The chemical structures of the obtained monomers and polymers were established by means of elemental analysis, FT-IR, H-1-NMR, and C-13-NMR methods. Thermal stability of the obtained polymers was also investigated and showed that they are reasonably thermostable.