[19a-Z02-1~8] 1.5 Instrumentation, measurement and Metrology

[19a-Z02-7] [Highlight]Spin-state observation and degradation-mechanism study of CFRP composite materials
by electron spin resonance spectroscopy

〇Dong Xue¹, Yue Nakamura¹, Satoshi Inai¹, Yuki Kaneko¹, Haruhisa Akiyama², Toshiaki Miura², Yukihiro Shimoi², Yusuke Imai², Daisuke Shimamoto², Yoshiki Sugimoto², Kazuhiro Marumoto^1,3 (1.Univ. of Tsukuba, 2.AIST, 3.TREMS, Univ. of Tsukuba)

Keywords:Carbon fiber-reinforced plastic, Electron spin resonance, Deterioration mechanism

Carbon fiber-reinforced plastic (CFRP) composites have attracted much attention because of its light weight and high rigidity compared to other structural materials. The CFRP composites are used in aircraft and electric vehicles. Also, it is essential structural material for improving energy efficiency by reducing material weight. Polymers contain defects and unpaired electrons at the ends of molecular chains. The number of unpaired electrons are thought to change with material deterioration. In other words, by using unpaired electrons as probes, material deterioration can be monitored at the molecular level. However, conventional research has not yet been conducted to analyze and control the deterioration state of rigid composites from microscopic viewpoint at molecular level. In this study, electron spin resonance (ESR) spectroscopy was used to measure and analyze CFRP composites at the molecular level to elucidate the deterioration mechanism.