| 초록 |
Mesophase pitches consist of molecules including high aromaticity and orientation. So, mesophase pitches based carbon materials have high thermal, electrical properties. Therefore it is important to understand the changes of chemical characteristics of the molecules during preparation of mesophase pitches from isotropic pitches in order to manufacture the high performance carbon materials. In this study, we prepared isotropic pitches from pyrolysis fuel oil with AlCl3 through catalytic modification as precursors of mesophase pitches. And then, prepared pitches were transformed the mesophase pitches through high heat treatment according to various reaction time. Elementary compositions of the mesophase pitches were confirmed by elemental analysis(EA). In addition, their aromaticities were calculated by combination of elemental analysis and fourier transform infrared spectroscopy(FT-IR) results. Crystallinities and molecular structures of the mesophase pitches were examined using X-ray diffraction(XRD) and solid state carbon-13 nuclear magnetic resonance(13C NMR) respectively. |
