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dc.contributor.authorABDALLAH-ELHIRTSI, Sofiane
dc.contributor.authorEBRAHIMI, Kambiz
dc.contributor.authorSHIRINBAYAN, Mohammadali
dc.contributor.authorFARZANEH, Sedigheh
dc.contributor.author
 hal.structure.identifier
TCHARKHTCHI, Abbas
14421 Laboratoire d'Ingénierie des Matériaux [LIM]
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
dc.contributor.authorFITOUSSI, Joseph
dc.date.accessioned2014
dc.date.available2014
dc.date.issued2014
dc.date.submitted2014
dc.identifier.issn2073-4360
dc.identifier.otherhttp://www.mdpi.com/2073-4360/6/4/1144
dc.identifier.urihttp://hdl.handle.net/10985/7985
dc.description.abstractIn this study some new concepts regarding certain aspects related to shape memory polymers are presented. A blend of polylactic acid (PLA) (80%) and polybutylene succinate (PBS) (20%) was prepared first by extrusion, then by injection molding to obtain the samples. Tensile, stress-relaxation and recovery tests were performed on these samples at 70 °C. The results indicated that the blend can only regain 24% of its initial shape. It was shown that, this partial shape memory effect could be improved by successive cycles of shape memory tests. After a fourth cycle, the blend is able to regain 82% of its shape. These original results indicated that a polymer without (or with partial) shape memory effect may be transformed into a shape memory polymer without any chemical modification. In this work, we have also shown the relationship between shape memory and property memory effect. Mono and multi-frequency DMA (dynamic mechanical analyzer) tests on virgin and 100% recovered samples of polyurethane (PU) revealed that the polymer at the end of the shape memory tests regains 100% of its initial form without regaining some of its physical properties like glass transition temperature, tensile modulus, heat expansion coefficient and free volume fraction. Shape memory (with and without stress-relaxation) tests were performed on the samples in order to show the role of residual stresses during recovery tests. On the basis of the results we have tried to show the origin of the driving force responsible for shape memory effect.
dc.language.isoen
dc.publisherMDPI
dc.rightsPost-print
dc.subjectpolymers
dc.subjectshape memory effect
dc.subjectproperties memory effect
dc.subjectpolyurethane
dc.titleSome New Concepts of Shape Memory Effect of Polymers
dc.identifier.doi10.3390/polym6041144
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Paris
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des matériaux
ensam.audienceInternationale
ensam.page1144-1163
ensam.journalPolymers
ensam.volume6
ensam.issue4
hal.identifierhal-00980623
hal.version1
hal.statusaccept


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