DC Field | Value | Language |
---|---|---|
dc.contributor.author | Heo, K | - |
dc.contributor.author | Jin, KS | - |
dc.contributor.author | Oh, W | - |
dc.contributor.author | Yoon, J | - |
dc.contributor.author | Jin, S | - |
dc.contributor.author | Ree, M | - |
dc.date.accessioned | 2016-04-01T01:51:56Z | - |
dc.date.available | 2016-04-01T01:51:56Z | - |
dc.date.created | 2009-02-28 | - |
dc.date.issued | 2006-08-17 | - |
dc.identifier.issn | 1520-6106 | - |
dc.identifier.other | 2006-OAK-0000006144 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/23876 | - |
dc.description.abstract | In situ grazing incidence small-angle X-ray scattering analysis was successfully performed during the thermal processing of film blends of polymethylsilsesquioxane (PMSSQ) precursor and triethoxysilyl-terminated six-arm poly(epsilon-caprolactone) (mPCL6) porogen. In addition, thermogravimetric analysis of the films was carried out in a nitrogen atmosphere. These measurements provide important information about the structures of the blend films and of the resulting porous films. In particular, they are used in this paper to establish the mechanism of the formation of imprinted pores within the blend films. During the heating run, the sacrificial thermal degradation of the porogen component commenced at 320 degrees C, generating pores in the resulting cured PMSSQ films. Only very limited porogen aggregation occurred during the blend film formation process (spin-coating and subsequent drying), and these porogen aggregates were of relatively small size and narrow size distribution. The observed restriction of the formation of such porogen aggregates was found to result from the favorable hybridization reaction of the porogen's reactive end groups with the reactive functional groups of the PMSSQ precursor, which competes with aggregation via reaction between the porogen molecules. The average radius (or half-size) of the porogen aggregates was in the range 2.45-3.98 nm, depending on the porogen loading (10-40 wt %). The porogen aggregates retained their size and size distribution until thermal degradation, which resulted in the imprinting of nanopores in the cured PMSSQ films with size and size distribution corresponding to those of the porogen aggregates. The porosities of the resulting nanoporous films were in the range 12.4-41.7%, depending on the initial porogen loading. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.subject | DIELECTRIC-CONSTANT MATERIALS | - |
dc.subject | POLYIMIDE | - |
dc.subject | MICROELECTRONICS | - |
dc.subject | BEHAVIOR | - |
dc.subject | POLY(EPSILON-CAPROLACTONE) | - |
dc.subject | REFLECTIVITY | - |
dc.subject | IMIDIZATION | - |
dc.subject | MISCIBILITY | - |
dc.subject | COMPOSITES | - |
dc.subject | PRECURSOR | - |
dc.title | Synchrotron X-ray scattering study of the mechanism of nanopore generation in nanoporous organosilicate thin films imprinted with a reactive six-armed porogen | - |
dc.type | Article | - |
dc.contributor.college | 화학과 | - |
dc.identifier.doi | 10.1021/JP061372I | - |
dc.author.google | Heo, K | - |
dc.author.google | Jin, KS | - |
dc.author.google | Oh, W | - |
dc.author.google | Yoon, J | - |
dc.author.google | Jin, S | - |
dc.author.google | Ree, M | - |
dc.relation.volume | 110 | - |
dc.relation.issue | 32 | - |
dc.relation.startpage | 15887 | - |
dc.relation.lastpage | 15895 | - |
dc.contributor.id | 10115761 | - |
dc.relation.journal | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICAL CHEMISTRY B, v.110, no.32, pp.15887 - 15895 | - |
dc.identifier.wosid | 000239656100039 | - |
dc.date.tcdate | 2018-12-01 | - |
dc.citation.endPage | 15895 | - |
dc.citation.number | 32 | - |
dc.citation.startPage | 15887 | - |
dc.citation.title | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.citation.volume | 110 | - |
dc.contributor.affiliatedAuthor | Ree, M | - |
dc.identifier.scopusid | 2-s2.0-33748575900 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 27 | - |
dc.description.scptc | 31 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | DIELECTRIC-CONSTANT MATERIALS | - |
dc.subject.keywordPlus | POLYIMIDE | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | POLY(EPSILON-CAPROLACTONE) | - |
dc.subject.keywordPlus | REFLECTIVITY | - |
dc.subject.keywordPlus | MISCIBILITY | - |
dc.subject.keywordPlus | COMPOSITES | - |
dc.subject.keywordPlus | ADHESION | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
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.