| 초록 |
Lately, epoxy resin is a class of high-performance materials and widely used, because of excellent engineering properties. However, epoxy resin has inherent brittleness and low impact strength due to the high cross-linking density. For this reason, much attention has been paid to the modification of epoxy in until now. One of the typical solutions is IPN Method which it can improve the toughness without phase separation and decreased mechanical properties. Polyhedral oligomeric silsesquioxane(POSS) which is the smallest silica particle has excellent thermal stability and mechanical properties. In this study, a flexible prepolymer was synthesized via thiol-ene reaction of PEGDMA with POSS-SH. For making hybrid epoxy polymer network, diglycidyl ether bisphenol A (DGEBA) and 4,4`-diaminodiphenyl methane(DDM) were mixed with various ratios(0, 5, 10phr) of hybrid prepolymer. The mixture was thermally cured to finally prepare the hybrid DGEBA / PEGDMA hybrid epoxy having IPN formation. |
