The Effect of 2-Isopropylimidazole on the Impact Resistance of Cured Epoxy Materials Abstract: This study investigates the influence of 2-isopropylimidazole (2-IPI), an imidazole derivative, on the impact resistance of cured epoxy resin systems. Epoxy resins are widely used as structural adhesives and composite matrices due to their excellent mechanical properties, chemical resistance, and thermal stability....