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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 524 | - |
dc.citation.startPage | 515 | - |
dc.citation.title | CARBON | - |
dc.citation.volume | 191 | - |
dc.contributor.author | Lee, Jung-Eun | - |
dc.contributor.author | Choi, Jiwon | - |
dc.contributor.author | Lee, Dong Je | - |
dc.contributor.author | Lee, Sung | - |
dc.contributor.author | Chae, Han Gi | - |
dc.date.accessioned | 2023-12-21T14:12:57Z | - |
dc.date.available | 2023-12-21T14:12:57Z | - |
dc.date.created | 2022-02-17 | - |
dc.date.issued | 2022-05 | - |
dc.description.abstract | The radial microstructure development of polyacrylonitrile-based carbon fibers is traced during continuous carbonization from 400 to 1400 °C. Based on the changes in the microstructure and mechanical properties of the fibers, it is confirmed that they undergo four distinctive stages depending on the temperature: (1) further cyclization in a remained unstabilized structure (400–600 °C), (2) crosslinking by dehydrogenation (600–800 °C), (3) crosslinking by denitrogenation (1000–1200 °C), and (4) development of turbostratic structure (1200–1400 °C). A structural analysis of the surface, skin, and core regions reveals that the innermost structure (core) originates from a high degree of structural relaxation. In contrast, densification is dominated in the outermost structure (surface). Such a radial heterogeneity is attributed to gas evolution along the radial direction of the fibers during the high-temperature carbonization and fiber shrinkage. The tensile strength exhibits a strong relationship with the crystal sizes as compared to the degree of disorder and amorphous structures, indicating that the crystal growth by densification has a greater influence on the tensile properties than the structure relaxation. | - |
dc.identifier.bibliographicCitation | CARBON, v.191, pp.515 - 524 | - |
dc.identifier.doi | 10.1016/j.carbon.2022.02.023 | - |
dc.identifier.issn | 0008-6223 | - |
dc.identifier.scopusid | 2-s2.0-85124614094 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/57244 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0008622322001087?via%3Dihub | - |
dc.identifier.wosid | 000760335400003 | - |
dc.language | 영어 | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Radial microstructure development of polyacrylonitrile (PAN)-based carbon fibers | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical;Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry;Materials Science | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Polyacrylonitrile (PAN) | - |
dc.subject.keywordAuthor | Carbonization | - |
dc.subject.keywordAuthor | Tensile property | - |
dc.subject.keywordAuthor | Radial heterogeneity | - |
dc.subject.keywordAuthor | Carbon fiber | - |
dc.subject.keywordPlus | RAMAN-SPECTROSCOPY | - |
dc.subject.keywordPlus | CONTINUOUS STABILIZATION | - |
dc.subject.keywordPlus | DENSIFICATION MECHANISM | - |
dc.subject.keywordPlus | HIGH-MODULUS | - |
dc.subject.keywordPlus | EVOLUTION | - |
dc.subject.keywordPlus | TRANSFORMATION | - |
dc.subject.keywordPlus | CARBONIZATION | - |
dc.subject.keywordPlus | GRAPHITE | - |
dc.subject.keywordPlus | GRAPHENE | - |
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