| 초록 |
In this work, the dielectric characteristics and cure behaviors of DGEBA/PET blend system were investigated. The degree of conversion for the blend system was measured using FT-IR. The cure kinetics were investigated by measurement of the cure activation energies (Ea) with dynamic DSC method. The dielectric constant of the blend system was examined by dielectric analysis (DEA). The fracture toughness was investigated by measuring the critical stress intensity factor (KIC). As a result, the Ea of the blend system was increased with increasing the PET content, showing a maximum value at 10 phr PET. The dielectric constant of the blend system was decreased with increasing the PET content. The flexure strength of the blend system was superior to that of the neat DGEBA. These results were probably due to the increase of cross-linking density of the blend system, resulting from the formation of hydrogen bonding between hydroxyl groups of DGEBA and carbonyl groups of PET. |
