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Poly(urethane-imide-Ester)s PUIEs were prepared by the intermolecular Diels-Alder (DA) reaction of various urethane containing bisfurans (Ia–d) with bismaleimide (IIA,B) having diglycidyl ether of bisphenol-A and F (DGEBA and F) (epoxy) segment. The DA reaction was carried out in 1, 4-dioxane as a solvent, as well as in bulk, followed by aromatization of unaromatized PUIEs intermediates in the presence...