Blending Mechanism of PS-b-PEO and PS Homopolymer at the Air/Water Interface and Their Morphological Control

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dc.contributor.authorKim, Baekmin Q.ko
dc.contributor.authorJung, Yunjiko
dc.contributor.authorSeo, Myungeunko
dc.contributor.authorChoi, Siyoung Q.ko
dc.date.accessioned2018-10-19T00:29:58Z-
dc.date.available2018-10-19T00:29:58Z-
dc.date.created2018-09-27-
dc.date.created2018-09-27-
dc.date.issued2018-09-
dc.identifier.citationLANGMUIR, v.34, no.35, pp.10293 - 10301-
dc.identifier.issn0743-7463-
dc.identifier.urihttp://hdl.handle.net/10203/245888-
dc.description.abstractWe report a blending mechanism of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) and PS homopolymer (homoPS) at the air/water interface. Our blending mechanism is completely different from the well-known "wet-dry brush theory" for bulk blends; regardless of the size of homoPS, the domain size increased and the morphology changed without macrophase separation, whereas the homoPS of small molecular weight (MW) leads to a transition after blending into the block copolymer domains, and the large MW homoPS is phase-separated in bulk. The difference in blending mechanism at the interface is attributed to adsorption kinetics at a water/spreading solvent interface. Upon spreading, PS-b-PEO is rapidly adsorbed to the water/spreading solvent interface and forms domain first, and then homoPS accumulates on them as the solvent completely evaporates. On the basis of our proposed mechanism, we demonstrate that rapid PS-b-PEO adsorption is crucial to determine the final morphology of the blends. We additionally found that spreading preformed self-assemblies of the blends slowed down the adsorption, causing them to behave similar to bulk blends, following the "wet-dry brush theory". This new mechanism provides useful information for various block copolymer-homopolymer blending systems with large fluid/fluid interfaces such as emulsions and foams.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.subjectAIR-WATER-INTERFACE-
dc.subjectLIVING RADICAL POLYMERIZATION-
dc.subjectLANGMUIR-BLODGETT MONOLAYERS-
dc.subjectOXIDE) DIBLOCK COPOLYMER-
dc.subjectTHIN-FILM BLENDS-
dc.subjectBLOCK-COPOLYMERS-
dc.subjectRAFT PROCESS-
dc.subjectCOPOLYMER/HOMOPOLYMER MIXTURES-
dc.subjectSURFACE MICELLES-
dc.subjectMOLECULAR-WEIGHT-
dc.titleBlending Mechanism of PS-b-PEO and PS Homopolymer at the Air/Water Interface and Their Morphological Control-
dc.typeArticle-
dc.identifier.wosid000444060500011-
dc.identifier.scopusid2-s2.0-85052317693-
dc.type.rimsART-
dc.citation.volume34-
dc.citation.issue35-
dc.citation.beginningpage10293-
dc.citation.endingpage10301-
dc.citation.publicationnameLANGMUIR-
dc.identifier.doi10.1021/acs.langmuir.8b02192-
dc.contributor.localauthorSeo, Myungeun-
dc.contributor.localauthorChoi, Siyoung Q.-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusAIR-WATER-INTERFACE-
dc.subject.keywordPlusLIVING RADICAL POLYMERIZATION-
dc.subject.keywordPlusLANGMUIR-BLODGETT MONOLAYERS-
dc.subject.keywordPlusOXIDE) DIBLOCK COPOLYMER-
dc.subject.keywordPlusTHIN-FILM BLENDS-
dc.subject.keywordPlusBLOCK-COPOLYMERS-
dc.subject.keywordPlusRAFT PROCESS-
dc.subject.keywordPlusCOPOLYMER/HOMOPOLYMER MIXTURES-
dc.subject.keywordPlusSURFACE MICELLES-
dc.subject.keywordPlusMOLECULAR-WEIGHT-
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