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Micellar transformations of poly(styrene-b-isoprene) block copolymers in selective solvents

dc.rights.licenseopen
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorDI COLA, Emanuela
hal.structure.identifierGroupe matière condensée et matériaux [GMCM]
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
dc.contributor.authorLEFEBVRE, Christelle
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 1 LCPO : Polymerization Catalyses & Engineering
dc.contributor.authorDEFFIEUX, Alain
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorNARAYANAN, Theyencheri
hal.structure.identifierCentre de Recherches sur les Macromolécules Végétales [CERMAV]
dc.contributor.authorBORSALI, Redouane
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2009
dc.identifier.issn1744-683X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/20711
dc.description.abstractEnThe morphology of micelles formed from linear and cyclic poly(styrene-b-isoprene) copolymers (PS166-b-PI278) has been studied in solvents with different selectivity for the two block components: heptane and decane, good solvents for the PI block, and DMF, a good solvent for the PS block. Using small and ultra small angle X-ray scattering experiments, SAXS and USAXS, respectively, morphological changes were monitored as a function of the temperature. While micelles formed in DMF were stable and no morphological changes occurred as a function of the temperature, transformations from cylinder-like micelles to vesicles-like objects were observed in both decane and heptane above 60 degrees C for the linear PS-b-PI copolymer. The transition occurred through intermediate steps, where the coexistence between different micellar morphologies was observed. On the contrary, the morphology of the block copolymers with the cyclic architecture was found to be independent of temperature and concentration. For linear blocks, a demicellization was detected at higher temperatures (above 80 degrees C) and the process was fully reversible when the solution was cooled down to ambient temperature. These results are consistent with complementary dynamic light scattering (DLS) observations.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.subject.enSMALL-ANGLE SCATTERING
dc.subject.enSPONTANEOUS VESICLE FORMATION
dc.subject.enTHREAD-LIKE MICELLES
dc.subject.enCRYO-TEM
dc.subject.enMICROPHASE SEPARATION
dc.subject.enDIBLOCK COPOLYMERS
dc.subject.enDYNAMICS
dc.subject.enCOLLOIDS
dc.subject.enSAXS
dc.title.enMicellar transformations of poly(styrene-b-isoprene) block copolymers in selective solvents
dc.typeArticle de revue
dc.identifier.doi10.1039/b812025k
dc.subject.halChimie/Polymères
bordeaux.journalSoft Matter
bordeaux.page1081-1090
bordeaux.volume5
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue5
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00380448
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00380448v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Soft%20Matter&rft.date=2009&rft.volume=5&rft.issue=5&rft.spage=1081-1090&rft.epage=1081-1090&rft.eissn=1744-683X&rft.issn=1744-683X&rft.au=DI%20COLA,%20Emanuela&LEFEBVRE,%20Christelle&DEFFIEUX,%20Alain&NARAYANAN,%20Theyencheri&BORSALI,%20Redouane&rft.genre=article


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