DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, SB | - |
dc.contributor.author | Shin, GJ | - |
dc.contributor.author | Chi, JH | - |
dc.contributor.author | Zin, WC | - |
dc.contributor.author | Jung, JC | - |
dc.contributor.author | Hahm, SG | - |
dc.contributor.author | Ree, M | - |
dc.contributor.author | Chang, T | - |
dc.date.accessioned | 2016-04-01T09:09:47Z | - |
dc.date.available | 2016-04-01T09:09:47Z | - |
dc.date.created | 2009-02-28 | - |
dc.date.issued | 2006-09-07 | - |
dc.identifier.issn | 0032-3861 | - |
dc.identifier.other | 2006-OAK-0000010711 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/29568 | - |
dc.description.abstract | Novel aromatic polypyromellitimides bearing (n-alkyloxy)biphenyloxy side chains were prepared by two-step polycondensation of 1,4-phenylenediamine (PDA) and biphenyl-4,4'-diamine (BZ) with 3,6-bis[4'-(n-alkyloxy)biphenyl-4-oxy]pyromellitic dianhydrides (CmB-PMDAs, m = 6, 8, 10, 12), which had been synthesized by the nucleophilic substitution of N,N'-diphenyl-3,6-dibromopyromellitimides with sodium 4-(n-alkyloxy)biphenoxides. Inherent viscosities of the poly(amic acid)s were in the 0.26-0.62 dL/g range. Poly{1,4-phenylene-3,6-bis[4'(n-alkyloxy)biphenyl-4-oxy]pyromellitimide}s (CmB-PPIs) and poly{4,4'-biphenyl-3,6-bis[4'-(n-alkyloxy)biphenyl-4-oxy]pyromellitimide}s (CmB-BPIs) obtained in films by thermal imidization of the corresponding poly(amic acid)s were characterized by FT-IR spectroscopy and elemental analysis, and their crystalline structure and thermal properties were measured and discussed with respect to the side chain length. After the polyimide films were surface-treated by rubbing with velvet fibers, standard liquid crystal (LC) cells containing 4-cyano-4'-n-pentyl-biphenyl (5CB) were fabricated and their LC-aligning properties were investigated in terms of pretilt angle. The pretilt angles were remarkably affected by side chain length and on surface of the polyimides with m = 6 and 8 LCs aligned parallel to the rubbing direction while on surface of the polyimides with m = 10 and 12 they aligned nearly or completely vertical to the rubbing direction. (c) 2006 Elsevier Ltd. All rights reserved. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.relation.isPartOf | POLYMER | - |
dc.subject | polyimides | - |
dc.subject | polypyromellitimides | - |
dc.subject | aromatic polyimides | - |
dc.subject | DEFINED BRUSH POLYIMIDE | - |
dc.subject | FULLY RODLIKE BACKBONE | - |
dc.subject | SEGMENTAL REORIENTATIONS | - |
dc.subject | SURFACE-MORPHOLOGY | - |
dc.subject | ALIGNMENT | - |
dc.subject | NANOFILMS | - |
dc.subject | SEQUENCE | - |
dc.subject | FILMS | - |
dc.subject | ROD | - |
dc.title | Synthesis, characterization and liquid-crystal-aligning properties of novel aromatic polypyromellitimides bearing (n-alkyloxy)biphenyloxy side chains | - |
dc.type | Article | - |
dc.contributor.college | 신소재공학과 | - |
dc.identifier.doi | 10.1016/j.polymer.2006.07.036 | - |
dc.author.google | Lee, SB | - |
dc.author.google | Shin, GJ | - |
dc.author.google | Chi, JH | - |
dc.author.google | Zin, WC | - |
dc.author.google | Jung, JC | - |
dc.author.google | Hahm, SG | - |
dc.author.google | Ree, M | - |
dc.author.google | Chang, T | - |
dc.relation.volume | 47 | - |
dc.relation.issue | 19 | - |
dc.relation.startpage | 6606 | - |
dc.relation.lastpage | 6621 | - |
dc.contributor.id | 10133873 | - |
dc.relation.journal | POLYMER | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | POLYMER, v.47, no.19, pp.6606 - 6621 | - |
dc.identifier.wosid | 000241171800019 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 6621 | - |
dc.citation.number | 19 | - |
dc.citation.startPage | 6606 | - |
dc.citation.title | POLYMER | - |
dc.citation.volume | 47 | - |
dc.contributor.affiliatedAuthor | Zin, WC | - |
dc.contributor.affiliatedAuthor | Ree, M | - |
dc.contributor.affiliatedAuthor | Chang, T | - |
dc.identifier.scopusid | 2-s2.0-33747770267 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 52 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | DEFINED BRUSH POLYIMIDE | - |
dc.subject.keywordPlus | SEGMENTAL REORIENTATIONS | - |
dc.subject.keywordPlus | SURFACE-MORPHOLOGY | - |
dc.subject.keywordPlus | ALIGNMENT | - |
dc.subject.keywordPlus | NANOFILMS | - |
dc.subject.keywordPlus | SEQUENCE | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordAuthor | polyimides | - |
dc.subject.keywordAuthor | polypyromellitimides | - |
dc.subject.keywordAuthor | aromatic polyimides | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Polymer Science | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.