| 초록 |
In this study, cycloaliphatic (CAE)/difunctional (DGEBA) epoxy blends with benzylquinoxalinium hexafluoroantimonate (BQH) were cured using an electron-beam technique. And, the effect of DGEBA content to CAE on thermal, mechanical, and morphological properties was investigated. The compositions of CAE/DGEBA blend system were varied within 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100 wt%. The thermal stability of the cured specimens was monitored by thermogravimetric analysis (TGA). Also, the critical stress intensity factor (KIC) of the cured specimens was performed to study the mechanical interfacial properties and the morphological fracture surfaces after KIC tests were observed by using a scanning electron microscope (SEM). As a result, the thermal stability and KIC value were increased as the DGEBA content increased. The maximum KIC value showed at the mixing ratio of 40:60. These results were probably due to the presence of phenyl group of DGEBA backbone.
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