DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shin, TJ | - |
dc.contributor.author | Lee, B | - |
dc.contributor.author | Youn, HS | - |
dc.contributor.author | Lee, KB | - |
dc.contributor.author | Ree, M | - |
dc.date.accessioned | 2016-03-31T13:11:38Z | - |
dc.date.available | 2016-03-31T13:11:38Z | - |
dc.date.created | 2009-02-28 | - |
dc.date.issued | 2001-12-11 | - |
dc.identifier.issn | 0743-7463 | - |
dc.identifier.other | 2001-OAK-0000002369 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/19278 | - |
dc.description.abstract | The imidization behavior and structural evolution in a microscaled film of poly(3,4'-oxydiphenylene pyromellitamic acid) precursor are studied by time-resolved synchrotron wide-angle X-ray diffraction and infrared spectroscopy to investigate the relationship between thermal imidization and structural evolution in the precursor. The precursor film displays only short-range order, but its polyimide film shows a crystalline structure based on an orthorhombic crystal lattice unit. When the precursor is heated at 2.0 degreesC/min, it undergoes imidization over the temperature range 124-310 degreesC through a two-step process: (i) decomplexation of the amide linkage from residual solvent molecules and other intra- and intermolecular amic acid groups and (ii) imide-ring closure. The maximum rate of imidization occurs at 148.4 degreesC. Anhydride rings are found to form transiently over the range 93-310 degreesC, which are attributed to the nature of the equilibrium between the precursor and its constituent anhydride- and amino-terminated species. The imidization reaction begins prior to the commencement of structural evolution. The structural evolution takes place over 132-380 degreesC as a three-step process: initiation, primary growth, and secondary growth. In particular, the initiation step requires at least 3.2% imidization. The structural evolution is further influenced by the short-range ordered structure formed in the precursor film in the process of film formation. However, the overall crystallinity in the fully imidized film is limited to only 21.4%. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | LANGMUIR | - |
dc.subject | DIFFERENTIAL SCANNING CALORIMETRY | - |
dc.subject | GLASS-TRANSITION BEHAVIORS | - |
dc.subject | AROMATIC POLYIMIDE | - |
dc.subject | MOLECULAR AGGREGATION | - |
dc.subject | CHAIN RIGIDITIES | - |
dc.subject | RESIDUAL-STRESS | - |
dc.subject | THIN-FILMS | - |
dc.subject | ORIENTATION | - |
dc.subject | SCATTERING | - |
dc.subject | PRECURSORS | - |
dc.title | Time-resolved synchrotron X-ray diffraction and infrared spectroscopic studies of imidization and structural evolution in a microscaled film of PMDA-3,4 '-ODA poly(amic acid) | - |
dc.type | Article | - |
dc.contributor.college | BK분자과학사업단 | - |
dc.identifier.doi | 10.1021/LA0108656 | - |
dc.author.google | Shin, TJ | - |
dc.author.google | Lee, B | - |
dc.author.google | Youn, HS | - |
dc.author.google | Lee, KB | - |
dc.author.google | Ree, M | - |
dc.relation.volume | 17 | - |
dc.relation.issue | 25 | - |
dc.relation.startpage | 7842 | - |
dc.relation.lastpage | 7850 | - |
dc.contributor.id | 10115761 | - |
dc.relation.journal | LANGMUIR | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | LANGMUIR, v.17, no.25, pp.7842 - 7850 | - |
dc.identifier.wosid | 000172590800021 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 7850 | - |
dc.citation.number | 25 | - |
dc.citation.startPage | 7842 | - |
dc.citation.title | LANGMUIR | - |
dc.citation.volume | 17 | - |
dc.contributor.affiliatedAuthor | Lee, KB | - |
dc.contributor.affiliatedAuthor | Ree, M | - |
dc.identifier.scopusid | 2-s2.0-0035846789 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 52 | - |
dc.description.scptc | 54 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | DIFFERENTIAL SCANNING CALORIMETRY | - |
dc.subject.keywordPlus | GLASS-TRANSITION BEHAVIORS | - |
dc.subject.keywordPlus | AROMATIC POLYIMIDE | - |
dc.subject.keywordPlus | MOLECULAR AGGREGATION | - |
dc.subject.keywordPlus | CHAIN RIGIDITIES | - |
dc.subject.keywordPlus | RESIDUAL-STRESS | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | ORIENTATION | - |
dc.subject.keywordPlus | SCATTERING | - |
dc.subject.keywordPlus | PRECURSORS | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Materials Science | - |
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