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김재업

Kim, Jaeup U.
Nanostructured Polymer Theory Lab.
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dc.citation.endPage 8681 -
dc.citation.number 22 -
dc.citation.startPage 8672 -
dc.citation.title MACROMOLECULES -
dc.citation.volume 52 -
dc.contributor.author Kim, Yeongsik -
dc.contributor.author Yong, Daeseong -
dc.contributor.author Lee, Wooseop -
dc.contributor.author Ahn, Hyungju -
dc.contributor.author Kim, Jong Hak -
dc.contributor.author Kim, Jaeup U. -
dc.contributor.author Ryu, Du Yeol -
dc.date.accessioned 2023-12-21T18:22:06Z -
dc.date.available 2023-12-21T18:22:06Z -
dc.date.created 2019-12-02 -
dc.date.issued 2019-11 -
dc.description.abstract Ultrathin random copolymer mats with cross-linkable glycidyl methacrylate units, consisting of styrene (S) and 2-vinylpyridine (2VP), are prepared on bare substrates to tune substrate interactions. Lamella-forming polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) films supported by a balanced (or neutral) interfacial interaction, opposite to those supported on a preferentially attracting substrate, exhibit the sensitivity of the order-to-disorder transition (ODT) to slight variations in thin thickness. A neutral composition of the random copolymers is determined to be S = 48.9 mol % for 81 kg/mol PS-b-P2VP films, favoring lamellae oriented perpendicular to the substrate. On the contrary, the lamellae of 15 kg/mol PS-b-P2VP films supported on a neutral mat prefer a parallel orientation to the surface, presumably because such low-molecular-weight PS-b-P2VP films (close to the weak segregation regime) are under the influence of the surface energy difference between the two blocks and a possible chain-end effect. Intriguingly, this effect of neutral mat interaction leads to thickness-dependent ODTs of the 15 kg/mol PS-b-P2VP films. The ODT temperature (TODT) decreases with decreasing film thickness when the film thickness is less than 13L0 (where L0 is the lamellar spacing) owing to the substrate compatibility effect of a neutral bottom mat toward the PS-b-P2VP films. Especially for the PS-b-P2VP films confined in the one-neutral and dual-neutral conditions, theoretical calculation based on the discrete chain self-consistent field theory supports that the TODT of the films decreases with decreasing film thickness below a certain thickness. -
dc.identifier.bibliographicCitation MACROMOLECULES, v.52, no.22, pp.8672 - 8681 -
dc.identifier.doi 10.1021/acs.macromol.9b01469 -
dc.identifier.issn 0024-9297 -
dc.identifier.scopusid 2-s2.0-85074847851 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/30487 -
dc.identifier.url https://pubs.acs.org/doi/abs/10.1021/acs.macromol.9b01469 -
dc.identifier.wosid 000500039300016 -
dc.language 영어 -
dc.publisher American Chemical Society -
dc.title Order-to-Disorder Transition of Lamella-Forming PS-b-P2VP Films Confined between the Preferential Surface and Neutral Substrate -
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 COPOLYMER THIN-FILMS -
dc.subject.keywordPlus PS-B-PMMA -
dc.subject.keywordPlus BLOCK-COPOLYMERS -
dc.subject.keywordPlus POLYSTYRENE-B-POLY(2-VINYLPYRIDINE) FILMS -
dc.subject.keywordPlus MICRODOMAIN ORIENTATION -
dc.subject.keywordPlus DIBLOCK COPOLYMERS -
dc.subject.keywordPlus BEHAVIOR -
dc.subject.keywordPlus LAYER -

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