| Summary: | 碩士 === 東海大學 === 化學工程與材料工程學系 === 100 === In this study, the photoinitiator, oligomers, and monomers with different proportions were mixed. The epoxy resins were cured by UV-A ultraviolet under a circulating nitrogen atmosphere. The completeness of curing was examined by using FTIR. Applying of TGA, TMA, and AFM for the initial degradation temperature, the glass transition temperature, the thermal expansion coefficient, and the average roughness helps to obtain the best curing condition.
When the Irgacure 250 photoinitiator content was fixed at 2 wt. % and the percentage between oligomers and monomers changed, the initial degradation temperature, the glass transition temperature, the thermal expansion coefficient, and the average roughness of the resins with D-1217 monomer increased with increasing monomer percentage. Nevertheless, these variation trends were contrary to those of the samples with D-669 monomer.
When the Chivacure 1176 photoinitiator content was fixed at 2 wt. % and the percentage between oligomers and monomers changed, no matter which monomer was used, the thermal expansion coefficient and the average roughness of the samples increased with increasing monomer percentage, but the initial degradation temperature of the samples decreased with increasing monomer percentage. The glass transition temperature of the resins with D-1217 monomer increased with increasing monomer percentage, but this variation trend was contrary to that of the samples with D-669 monomer.
When the Irgacure 250 photoinitiator content changed and the amounts of oligomers and monomers were fixed, no matter which monomer was used, the initial degradation temperature and the average roughness of the samples increased with increasing photoinitiator percentage. The glass transition temperature and the thermal expansion coefficient of the resins with D-1217 monomer increased with increasing photoinitiator percentage, but these variation trends were contrary to those of the samples with D-669 monomer.
When the Chivacure 1176 photoinitiator content changed and the amounts of oligomers and monomers were fixed, no matter which monomer was used, the glass transition temperature and the average roughness of the samples increased with increasing photoinitiator percentage, but the thermal expansion coefficient of the samples decreased with increasing photoinitiator percentage. The initial degradation temperature of the resins with D-1217 monomer increased with increasing photoinitiator percentage, but this variation trend was contrary to that of the samples with D-669 monomer.
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