An ESR study of the gamma radiolysis of aromatic polyesters containing isomeric naphthalene links
DC Field | Value | Language |
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dc.contributor.author | Hill, DJT | - |
dc.contributor.author | Choi, BK | - |
dc.contributor.author | Ahn, HK | - |
dc.contributor.author | Choi, EJ | - |
dc.date.accessioned | 2024-02-27T13:02:36Z | - |
dc.date.available | 2024-02-27T13:02:36Z | - |
dc.date.issued | 2001-07 | - |
dc.identifier.issn | 0969-806X | - |
dc.identifier.uri | https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/27055 | - |
dc.description.abstract | Six polyesters were synthesised from 4,4 ' -oxy-bis(benzoyl chloride) and 1,4-, 1,5-, 1,6-, 2,3-, 2,6-, and 2,7-naphthalenediol isomers. The structures of the polyesters were characterised by means of IR, inherent viscosities in tetrachloroethane (TCE), solutions at 303 K and thermal analysis. The glass transition temperatures were in the range of 425-494 K by DSC thermal analysis. All of the polyesters were irradiated in an AECL Gammacell 220 unit at a dose rate of approximately 6.7 kGy/h to doses in the range of 0-15 kGy at 77 and 300 K. ESR spectroscopy was used to examine the radicals formed during radiolysis and to measure their yields. The G-values for radical formation in the polyesters were found to be in the range 0.18-1.41 at 77 K and 0.19-0.78 at 300 K. At 77 K, up to 15% of the radicals formed on radiolysis were found to be photo-bleachable anion radicals. Annealing experiments were carried out in order to identify the neutral radicals, which were assigned to naphthyl- or phenyl- and phenoxyl-type radicals. (C) 2001 Elsevier Science Ltd. All rights reserved. | - |
dc.format.extent | 7 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | An ESR study of the gamma radiolysis of aromatic polyesters containing isomeric naphthalene links | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1016/S0969-806X(01)00438-8 | - |
dc.identifier.wosid | 000171084000026 | - |
dc.identifier.bibliographicCitation | RADIATION PHYSICS AND CHEMISTRY, v.62, no.1, pp 195 - 201 | - |
dc.citation.title | RADIATION PHYSICS AND CHEMISTRY | - |
dc.citation.volume | 62 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 195 | - |
dc.citation.endPage | 201 | - |
dc.type.docType | Article; Proceedings Paper | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Nuclear Science & Technology | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nuclear Science & Technology | - |
dc.relation.journalWebOfScienceCategory | Physics, Atomic, Molecular & Chemical | - |
dc.subject.keywordPlus | ELECTRON-SPIN-RESONANCE | - |
dc.subject.keywordPlus | RADIATION | - |
dc.subject.keywordPlus | ACID) | - |
dc.subject.keywordAuthor | aromatic polyesters | - |
dc.subject.keywordAuthor | synthesis | - |
dc.subject.keywordAuthor | sensitivity to gamma-radiolysis | - |
dc.subject.keywordAuthor | ESR study | - |
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