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Micellar aggregation in blends of linear and cyclic poly(styrene-b-isoprene) diblock copolymers

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hal.structure.identifierUniv Mons, Belgique, Serv Chim Mat Nouveaux
dc.contributor.authorOUARTI, Nadia
hal.structure.identifierUniv Mons, Belgique, Serv Chim Mat Nouveaux
dc.contributor.authorVIVILLE, Pascal
hal.structure.identifierUniv Mons, Belgique, Serv Chim Mat Nouveaux
dc.contributor.authorLAZZARONI, Roberto
hal.structure.identifierUniv Fed Santa Catarina, Dept Quim
dc.contributor.authorMINATTI, Edson
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
dc.contributor.authorSCHAPPACHER, Michel
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
hal.structure.identifierTeam 1 LCPO : Polymerization Catalyses & Engineering
dc.contributor.authorDEFFIEUX, Alain
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
hal.structure.identifierCentre de Recherches sur les Macromolécules Végétales [CERMAV]
dc.contributor.authorPUTAUX, Jean-Luc
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
hal.structure.identifierTeam 3 LCPO : Polymer Self-Assembly & Life Sciences
dc.contributor.authorBORSALI, Redouane
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2005
dc.identifier.issn0743-7463
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/20687
dc.description.abstractEnThe morphology of micelles formed from blends of linear and cyclic poly(styrene-b-isoprene) (PS-b-PI) block copolymers has been investigated in solution using dynamic light scattering (DLS) and in thin solid deposits by atomic force microscopy (AFM) and transmission electron microscopy under cryogenic conditions (cryo-TEM). Micelles of the pure cyclic PS290-b-PI110 copolymers are wormlike cylindrical objects built by unidirectional aggregation of 33 nm wide sunflower micelles, while the linear block copolymer having the same volume fraction and molar mass forms spherical micelles 40 nm in diameter. The DLS, AFM, and cryo-TEM results consistently show that the addition of the linear copolymer (even for amounts as low as 5% w/w) to the cyclic copolymer rather favors the formation of spherical micelles at the expense of the cylindrical aggregates. Those results clearly show that the linear block copolymer chains can be used to stabilize the thermodynamically unstable elementary sunflower micelle. The thermal stability of the micelles (from the pure copolymers and from the blends) has been examined in solid deposits with in situ AFM measurements. Coalescence starts at about 70 degrees C, and the surface roughness shows a two-step decrease toward a fully homogeneous and flat structure.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enWORMLIKE MICELLES
dc.subject.enFORMING COPOLYMERS
dc.subject.enHOMOPOLYMER BLENDS
dc.subject.enSELECTIVE SOLVENTS
dc.subject.enEXCLUDED-VOLUME INTERACTIONS
dc.subject.enSMALL-ANGLE NEUTRON
dc.subject.enBLOCK-COPOLYMER
dc.subject.enORDERED STRUCTURE
dc.subject.enPHASE-EQUILIBRIA
dc.subject.enLIGHT-SCATTERING
dc.title.enMicellar aggregation in blends of linear and cyclic poly(styrene-b-isoprene) diblock copolymers
dc.typeArticle de revue
dc.identifier.doi10.1021/la050935z
dc.subject.halChimie/Polymères
bordeaux.journalLangmuir
bordeaux.page9085-9090
bordeaux.volume21
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue20
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00394115
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00394115v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Langmuir&rft.date=2005&rft.volume=21&rft.issue=20&rft.spage=9085-9090&rft.epage=9085-9090&rft.eissn=0743-7463&rft.issn=0743-7463&rft.au=OUARTI,%20Nadia&VIVILLE,%20Pascal&LAZZARONI,%20Roberto&MINATTI,%20Edson&SCHAPPACHER,%20Michel&rft.genre=article


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