Synthesis of Epoxy Resin from Plant-Based Curcumin

Abstract

The epoxy resin was synthesized from curcumin and epichlorohydrin. The obtained epoxy resin had M_n = 1680, M_w = 2380, M_w / M_n = 1.5.Then, the curing of the epoxy resin was carried out at room temperature using ethylenediamine and the obtained cured epoxy showed fluorescence and excellent physical properties. Structural analysis of the epoxy resin was measured by FT-IR, ¹H and ¹³C NMR. The UVvis absorption spectrum of the cured epoxy confirmed an absorption peak at 460 nm. In addition, the fluorescence spectrum of the cured epoxy was confirmed at 500 nm. The glass transition temperature and thermal weight loss temperature of the cured epoxy were 90°C and 375°C respectively. The stress-strain curves showed that the cured epoxy was brittle and hard.