There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 2685 | - |
dc.citation.number | 10 | - |
dc.citation.startPage | 2681 | - |
dc.citation.title | POLYMER | - |
dc.citation.volume | 40 | - |
dc.contributor.author | Han, H | - |
dc.contributor.author | Chung, H | - |
dc.contributor.author | Gryte, CC | - |
dc.contributor.author | Shin, TJ | - |
dc.contributor.author | Ree, M | - |
dc.date.accessioned | 2023-12-22T12:11:32Z | - |
dc.date.available | 2023-12-22T12:11:32Z | - |
dc.date.created | 2020-01-23 | - |
dc.date.issued | 1999-05 | - |
dc.description.abstract | Poly(amic diethyl ester) [PAE] precursors of four different polyimides with various chain rigidities were synthesized and thermally converted to the polyimides in thin films: rodlike poly(p-phenylene pyromellitimide) [PMDA-PDA] and poly(4,4'-biphenylene pyromellitimide) [PMDA-BZ], pseudo-rodlike poly(p-phenylene biphenylenetetracarboximide) [BPDA-PDA] and semiflexible poly(4,4-oxydiphenylene pyromellitimide) [PMDA-ODA PAE]. For the polyimide films, water sorption behaviors were investigated by gravimetry and then compared with those of the polyimides prepared from the corresponding poly(amic acid) [PAA] precursors. In addition, their morphological structures were examined by X-ray diffraction. For all the polyimides, both water sorption and morphological structure were dependent upon the history of precursor origin. All the polyimides except PMDA-ODA revealed relatively higher diffusion coefficient of water, higher water sorption, lower intermolecular packing order and lower population of a more ordered phase in the PAE-derived polyimide films than the corresponding PAA-derived polyimide films. For PMDA-ODA, the variations in the water diffusion and sorption due to the precursor origin were relatively small in spite of a relatively large change in the morphological structure. Overall, the effect of precursor origin on the water diffusion and sorption is significantly high in the rodlike or pseudo-rodlike polyimides having a high chain rigidity and high intermolecular packing order, but relatively low in the semiflexible polyimide with a relatively low chain rigidity. In comparison, regardless of the precursor origins, the diffusion coefficient of water was in the decreasing order PMDA-ODA > PMDA-PDA > PMDA-BZ > BPDA-PDA and, however, the water sorption was in the decreasing order PMDA-PDA > PMDA-BZ > PMDA-ODA > BPDA-PDA. These water diffusion and sorption behaviors were understood by considering their chemical affinities to water in addition to the morphological structures. | - |
dc.identifier.bibliographicCitation | POLYMER, v.40, no.10, pp.2681 - 2685 | - |
dc.identifier.doi | 10.1016/S0032-3861(98)00481-9 | - |
dc.identifier.issn | 0032-3861 | - |
dc.identifier.scopusid | 2-s2.0-0000066275 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/30913 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0032386198004819?via%3Dihub | - |
dc.identifier.wosid | 000078290700024 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.title | Effects of precursor origins on water sorption behaviors of various aromatic polyimides in thin films | - |
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.keywordAuthor | water sorption | - |
dc.subject.keywordAuthor | diffusion coefficient | - |
dc.subject.keywordAuthor | polyimides | - |
dc.subject.keywordPlus | IMIDIZATION HISTORY | - |
dc.subject.keywordPlus | THICKNESS | - |
dc.subject.keywordPlus | HUMIDITY | - |
dc.subject.keywordPlus | MIXTURES | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.