Epoxy Resin Based on Poly(ethylene terephthalate) Waste: Synthesis and Characterization

Abstract

Aromatic epoxy resin based on poly(ethylene terephthalate), PET, was synthesised by glycolysis of PET with different ratios of diethanolamine or triethanolamine and manganese acetate as a catalyst. The glycolyzed products were reacted with epichlorohydrine to prepare a series of di- and tetraglycidyl epoxy resins with different molecular weights. P-Phenylene diamine and diaminodiphenylether were used as curing agents. The curing reactions and thermal properties of cured aromatic epoxy resins were investigated. Curing and post cure peaks were observed in dynamic DSC thermograms. The crosslinked network was thermally stable up to 470^oC. Preliminary tests indicate that the resins exhibit superior adhesion properties.

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