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On the bridge hypothesis in the glass transition of freestanding polymer films

hal.structure.identifierGulliver (UMR 7083)
dc.contributor.authorBONNEAU, Haggai
hal.structure.identifierTel Aviv University [TAU]
dc.contributor.authorARUTKIN, Maxence
hal.structure.identifierUniversity of Toronto, Toronto
dc.contributor.authorCHEN, Rainni
hal.structure.identifierUniversity of Waterloo [Waterloo]
dc.contributor.authorFORREST, James
hal.structure.identifierGulliver (UMR 7083)
dc.contributor.authorRAPHAËL, Elie
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorSALEZ, Thomas
dc.date.issued2023
dc.identifier.issn1292-8941
dc.description.abstractEnFreestanding thin polymer films with high molecular weights exhibit an anomalous decrease in the glass-transition temperature with film thickness. Specifically, in such materials, the measured glass-transition temperature evolves in an affine way with the film thickness, with a slope that weakly depends on the molecular weight. De Gennes proposed a sliding mechanism as the hypothetical dominant relaxation process in these systems, where stress kinks could propagate in a reptation-like fashion through so called bridges, i.e. from one free interface to the other along the backbones of polymer macromolecules. Here, by considering the exact statistics of finite-sized random walks within a confined box, we investigate in details the bridge hypothesis. We show that the sliding mechanism cannot reproduce the basic features appearing in the experiments, and we exhibit the fundamental reasons behind such a fact.
dc.description.sponsorshipMouvement brownien au voisinage d'interfaces molles
dc.description.sponsorshipCapteur Interférométrique de Contraintes de Surface - ANR-21-CE06-0029
dc.description.sponsorshipFrottements dans les systèmes complexes - ANR-21-CE06-0039
dc.language.isoen
dc.publisherEDP Sciences: EPJ
dc.title.enOn the bridge hypothesis in the glass transition of freestanding polymer films
dc.typeArticle de revue
dc.identifier.doi10.1140/epje/s10189-023-00272-z
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Mécanique statistique [cond-mat.stat-mech]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des matériaux [physics.class-ph]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des solides [physics.class-ph]
dc.subject.halPhysique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
dc.identifier.arxiv2212.04296
dc.description.sponsorshipEuropeBrownian Motion near Soft Interfaces
bordeaux.journalEuropean Physical Journal E: Soft matter and biological physics
bordeaux.page8
bordeaux.volume46
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-03889405
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03889405v1
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