| 학회 |
한국고분자학회 |
| 학술대회 |
2003년 가을 (10/10 ~ 10/11, 부경대학교) |
| 권호 |
28권 2호, p.326 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
Beam Damage of Polycarbonate in the Environmental Scanning Electron Microscope : an FT-IR study |
| 초록 |
The environmental scanning electron microscope(ESEM) allows the examination of surfaces of virtually any specimen as wet and insulating, because it allows the introduction of a gaseous environment in the specimen chamber. Specimen damage from the electron beam poses a considerable problem in electron microscopy. This damage is particularly acute in ESEM. Water molecules ionized by electron beam as an imaging gas in the specimen chamber produce hydrogen and hydroxyl free radicals which attack the organic material of the sample. In this work to elucidate the beam damage, areas of polycarbonate films were exposed to the electron beam at varying dose and exposure times under the dehydrating conditions and different imaging gases(water vapor or nitrogen). In other to investigate the beam damage, the chemical changes of the polycarbonate(PC) due to the electron-beam irradiation were observed by using FT-IR. The most obvious chemical and physical changes occurred as a result of the electron beam exposure were the formation of volatile products and mass loss, the appearance of unsaturated structures, chain scission and cross-linking. In the presence of water, free-radical-initiated reactions led to hydrolysis and oxidation of PC.
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| 저자 |
조혜진1, 류주환2, 송시용1, 신세문1, 최길영1
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| 소속 |
1한국화학(연), 2충남대 |
| 키워드 |
Beam Damage |
| E-Mail |
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