Nylon-6/epoxy resin composite with multiphase morphology has been successfully prepared via polymerization of caprolactam in N-methylpyrrolidone using N-acetyl caprolactam as the initiator. This was followed by reactive blending of appropriate amount of the plastic with epoxy resin. The structure of nylon-6 prepared by solution polymerization is predominantly [200, 020] crystalline form with [002] crystalline form as the minor phase. Subsequently, nylon-6/epoxy composite was prepared at 150 degrees C in a Teflon mold. A remarkable heterogeneous morphology of the fractured surface of the film was observed, consisting of multilayered fiber-like crystals encapsulated in the epoxy resin matrix. Close inspection of the morphology of the composite revealed a preference of nylon-6 to crystallize in the crevices and cracks created in glassy epoxy matrix during processing. The crystals seem to nucleate spontaneously and grow radially into spherulites. POLYM. ENG. SCI., 54:858-866, 2014. (c) 2013 Society of Plastics Engineers