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DC Field | Value | Language |
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dc.citation.endPage | 1941 | - |
dc.citation.number | 4 | - |
dc.citation.startPage | 1930 | - |
dc.citation.title | MACROMOLECULES | - |
dc.citation.volume | 43 | - |
dc.contributor.author | Wakita, Junji | - |
dc.contributor.author | Jin, Sangwoo | - |
dc.contributor.author | Shin, Tae Joo | - |
dc.contributor.author | Ree, Moonhor | - |
dc.contributor.author | Ando, Shinji | - |
dc.date.accessioned | 2023-12-22T07:12:49Z | - |
dc.date.available | 2023-12-22T07:12:49Z | - |
dc.date.created | 2020-01-23 | - |
dc.date.issued | 2010-02 | - |
dc.description.abstract | The intermolecular aggregation structures of fully aromatic polyimides (Ar-PIs) prepared from pyromillitic dianhydride (PMDA) and those of semialiphatic polyimides (Al-PIs) from 4,4'-diamino-cyclohexylmethane (DCHM) were characterized by a grazing incidence wide-angle X-ray scattering (GIWAXS) technique. The aggregation structures of both Ar- and Al-PI thin films formed on Si substrates were identified as a mixture of it liquid-crystalline-like ordered domain and an amorphous matrix. For Ar-PIs whose glass transition temperatures (T-g) are higher than the imidization temperature (T-i), the aggregation structures are significantly influenced by the three-dimensional structures of the PI chain. Rodlike molecular structures with high planarity are prerequisites for the growth of ordered domains of Ar-PIs, whereas an Ar-PI having a bent and nonplanar structure displays the highest intensities of an amorphous halo. In addition, the bulky -CF3 groups in the diamine moiety increase the interchain distance in the ordered domains. On the other hand, for Al-PIs whose T(g)s arc lower than T-i, the degrees of interchain ordering in the ordered domains were higher than those of Ar-PIs, but the orientation of the ordered domains was decreased significantly by decreasing their T(g)s. This is due to the vigorous motion of PI chains during thermal imidization. | - |
dc.identifier.bibliographicCitation | MACROMOLECULES, v.43, no.4, pp.1930 - 1941 | - |
dc.identifier.doi | 10.1021/ma902252y | - |
dc.identifier.issn | 0024-9297 | - |
dc.identifier.scopusid | 2-s2.0-77249097323 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/30891 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/ma902252y | - |
dc.identifier.wosid | 000274529800036 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Analysis of Molecular Aggregation Structures of Fully Aromatic and Semialiphatic Polyimide Films with Synchrotron Grazing Incidence Wide-Angle X-ray Scattering | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | ORGANOSILICATE DIELECTRIC FILMS | - |
dc.subject.keywordPlus | COPOLYMER THIN-FILMS | - |
dc.subject.keywordPlus | CRYSTALLINE-STRUCTURE | - |
dc.subject.keywordPlus | THICKNESS DEPENDENCE | - |
dc.subject.keywordPlus | THERMAL IMIDIZATION | - |
dc.subject.keywordPlus | LIQUID-CRYSTALLINE | - |
dc.subject.keywordPlus | CHAIN ORIENTATION | - |
dc.subject.keywordPlus | DIFFRACTION | - |
dc.subject.keywordPlus | POLYFLUORENE | - |
dc.subject.keywordPlus | ALIGNMENT | - |
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