Abstract
Tetra functional epoxy resins were prepared by the reaction of diethanolamine with Diels–Alder adducts of rosin ketone. These adducts were reacted with epichlorohydrine in the presence of NaOH as a catalyst to produce epoxy resins. The resins obtained were characterized by IR and 1H NMR spectroscopy. The curing behaviours of these resins with their poly (amide-imide) derivatives were investigated by viscosity measurements. The curing activation energy was calculated from the gel time and critical viscosity measurements. The curing exotherms of the epoxy resins produced with poly (amide-imide) hardeners were investigated. The curing and gel times of the resins produced show slight differences between the synthesized resins. The chemical resistances and mechanical properties of the cured films were evaluated. The produced coats show high stability for salt spray at a duration time of 563 h.
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Atta, A.M., Mansour, R., Abdou, M.I. et al. Synthesis and Characterization of Tetra-Functional Epoxy Resins from Rosin. J Polym Res 12, 127–138 (2005). https://doi.org/10.1007/s10965-004-2936-x
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DOI: https://doi.org/10.1007/s10965-004-2936-x