| 초록 |
Epoxy was one of the most widely used thermosetting resins due to outstanding mechanical, dielectric, and adhesive properties. However, epoxy has inherent brittleness and low impact strength. To solve above problems, many investigations have been paid to enhance the toughness of epoxy such as the blending of rubber, core-shell and IPN method. IPN method can improve the toughness without phase separation and decreased mechanical properties. Poly(ethylene glycol) is frequently used for IPN formation with epoxy because it is easy to have physically bonding with epoxy for impact dispersion. In this study, a flexible prepolymer was synthesized via thiol-ene reaction of poly(ethylene glycol)dimethacrylate(PEGDMA) and POSS-SH. Polyhedral oligomeric silsesquioxane(POSS) which is one of the organic-inorganic hybrid materials has excellent thermal stability and mechanical properties. After then, Diglycidyl ether bisphenol A (DGEBA) was mixed with various ratios of prepolymer using curing agent. |
