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dc.contributor.author
 hal.structure.identifier
BARTCZAK, Zbigniew
303306 Polska Akademia Nauk [PAN]
dc.contributor.author
 hal.structure.identifier
GRALA, Magdalena
303306 Polska Akademia Nauk [PAN]
dc.contributor.author
 hal.structure.identifier
RICHAUD, Emmanuel
86289 Procédés et Ingénierie en Mécanique et Matériaux [Paris] [PIMM]
dc.contributor.author
 hal.structure.identifier
GADZINOWSKA, Krystyna
303306 Polska Akademia Nauk [PAN]
dc.date.accessioned2017
dc.date.available2017
dc.date.issued2016
dc.date.submitted2017
dc.identifier.urihttp://hdl.handle.net/10985/11554
dc.description.abstractSamples of linear polyethylene, neat and crosslinked by irradiation with electron beam, were subjected to heavy plastic deformation by plane-strain compression up to the true strain exceeding 2 (deformation ratio λ > 8) at room temperature. Structural studies of deformed samples and investigation of long-term strain recovery demonstrated that the deformation of the neat, non-crosslinked HDPE is completely reversible above the melting point of the crystalline phase, provided that the applied true strain does not exceed e = 1.0 (λ = 2.7). At higher applied strains, e > 1, an irreversible deformation component emerged gradually, and at e = 2.1 (λ = 8.2), the permanent, truly irreversible, residual strain was approx. eres = 0.36 (λ = 1.4). In contrast, samples of crosslinked HDPE above Tm exhibited complete reversibility of deformation, irrespectively of an applied strain, and eres ≈ 0. The source of permanent irreversible strain component in neat HDPE is a deformation-induced partial destruction of the molecular network of entangled chains within amorphous interlamellar layers. The principal mechanism found was chain disentanglement, which was supplemented by a very limited chain scission. In the case of crosslinked materials, the dense and relatively homogeneous molecular network appeared robust enough to avoid any damage. Consequently, the strain appeared here fully reversible upon melting of crystalline phase.
dc.language.isoen
dc.publisherElsevier
dc.rightsPost-print
dc.subjectSemicrystalline polymer
dc.subjectPolyethylene
dc.subjectPlastic deformation
dc.subjectMolecular network
dc.subjectEntanglements
dc.titleErosion of the molecular network in the amorphous layers of polyethylene upon high- strain deformation
dc.identifier.doi10.1016/j.polymer.2016.07.068
dc.typdocArticles dans des revues avec comité de lecture
dc.localisationCentre de Paris
dc.subject.halChimie: Polymères
dc.subject.halSciences de l'ingénieur: Mécanique: Matériaux et structures en mécanique
ensam.audienceInternationale
ensam.page552–565
ensam.journalPolymer
ensam.volume99
ensam.peerReviewingOui
hal.identifierhal-01473940
hal.version1


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