Polyhydroxyesterimides from Renewable Resources: Synthesis, Characterization, Properties

Abstract

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, ¹H-NMR, and ¹³C-NMR methods. Thermal stability of the obtained polymers was also investigated and showed that they are reasonably thermostable.

Keywords:

• Diels-Alder adduct
• polyesters
• polyimides
• renewable resources

Notes

^a DA-diamine.

T_M – maximum peak temperature °C.

++ soluble at room temperature.

+ soluble by heating.

− insoluble.

+ − partial soluble or swelling.