| 초록 |
Recently, high performance epoxy systems have been widely used in industrial areas such as automotive and electronics. In this study, high performance structural adhesives based on epoxy system have been prepared to investigate improved mechanical properties including lap-shear, T-peel and impact-peel strengths at various temperature conditions from -40 to 80℃. Flexible epoxies containing short or long thermoplastic backbones are synthesized and nano-sized functional materials dispersed in flexible epoxies. Nano-sized functional materials include core-shell rubber, surface-treated SiO2, surface-treated CaO and copolymer rubbers. Dicyandiamide as a curing agent and 1-2(2-cyanoethyl)-2-ethyl-4-methylimidazole (2E4Mz-CNS) as a catalyst are used in the epoxy systems. CSR, inorganic particles and copolymer rubbers improved lap-shear T-peel strengths at 23℃. CSR and synthesized flexible epoxy improved impact-peel strengths at 23℃ as well as -40℃. |
