| 초록 |
Thermosetting resins, such as modified epoxy, unsaturated polyester and vinylester can be cured by thermal process involved room temperature, UV radiation and the combination of above two methods. Their major advantages of UV curing process are high-speed process, low energy consumption due to the operation at room temperature, and environmental friendliness by avoiding solvent exposure. In this study, interfacial properties of glass fiber/epoxyacrylate and vinylester composites were investigated using micromechanical and surface wettability tests. Optimum UV curing time was established by measuring mechanical properties and interfacial shear strength (IFSS). In order to improve IFSS, the surface of glass fiber was treated by amino-silane coupling agent and they were correlated with their mechanical properties and work of adhesion including polar- and nonpolar terms with the base-acid interaction. Surface treatment and drying conditions are not same as the thermal curing condition. Interfacial control due to UV radiation and their analysis is very important parameter. For both the untreated and treated cases, IFSS and work of adhesion of glass fiber/epoxyacrylate composite were higher than those of vinylester system. Total mechanical performance and IFSS should be optimized for UV curing composite systems. Acknowledgment: This work was financially supported from CAMP of the 21st C Frontier R&D program by MST, through ERI, GNU. |
