| 초록 |
Poly(ether ether ketone) (PEEK) is used in space application, nuclear industry because of these has a extraordinary mechanical properties. In this study, the effects of an electron beam irradiation on the mechanical and thermal properties of PEEK were investigated. Irradiations were carried out using an ELV-4 accelerator at an acceleration voltage of 2.5 MeV and a beam current of 4 mA. The glass transition temperature of the irradiated PEEK films increased linearly with the absorbed dose. This indicates the formation of crosslinks, these crosslinks prevent a crystallization on heating to above Tg. Conversely, the tensile strength and elongation for the irradiated PEEK films decreased with the irradiation dose. It was revealed that a tendency to embrittlement affected not only by crosslinking but also by the orientation of molecular chains. Furthemore, decomposition temperatures of the irradiated PEEK films were slightly increased and the residue weight was also increased. |
