@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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    dct:description """
              In a general manner, the present thesis focuses on electrostrictive polymers which can be used either as flexible electromechanical actuators or as sensors or energy harvesters. Chapter 1 is a general introduction to electro-mechanical coupled systems. The choice of the materials is described and focuses on dielectric elastomers, polyurethane (PU) with conductive carbon black (CB) nano-particle fillers. Chapter 2 focuses on the film synthesis. CB nano-particles in the form of micelles and solution cast method were employed to provide good filler dispersion. The strain enhancement of a factor of 1.6 was obtained by 0.89 vol% CB doping. Chapter 3 exposes the modeling of electrostrictive actuation and in particular the saturation of the polarization. By modeling the polarization as a nonlinear function depending on two variables (low-level permittivity and saturation field), it is therefore possible to describe several phenomena that cannot be explained by a classical linear and homogeneous approach. Simulations performed using such an approach show a good agreement with experimental results. Chapter 4 presents the comparison between pure PU and composite films. It includes mechanical/electrical characterization as well as XRD or DSC measurements to detect the crystallization level. High dispersion level was visually confirmed. Strains of the order of 50 % were reached. Chapter 5 deals with the effect of electric charge injection by homogeneous electron beam irradiation (HEBI) on the electrostrictive strain. This technique therefore permits a gain of 2 on the obtained strain and seems to significantly reduce the losses in the material as well.
            """ ;
    dct:identifier "NNT: 2011ISAL0067" ;
    dct:issued "2026-05-17T00:23:43.897884"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-17T00:23:43.897889"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Polymères électrostrictifs à forte déformation : Méthode d'élaboration et modélisation" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00701539v1/resource/9da4df21-6f1e-4076-af72-fe1c94797035> ;
    dcat:keyword "actionneur-piezoelectrique",
        "conductive-polymer",
        "couplage-electromecanique",
        "electromechanical-coupling",
        "electrostrictive-polymer",
        "infoeu-reposemanticsdoctoralthesis",
        "permittivite",
        "permittivity",
        "piezoelectric-actuator",
        "polymere-conducteur",
        "polymere-electrostrictif",
        "spiotherengineering-sciences-physicsother",
        "theses" ;
    dcat:landingPage <https://theses.hal.science/tel-00701539> .

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    dct:format "HTML" ;
    dct:issued "2026-05-17T00:23:43.923799"^^xsd:dateTime ;
    dct:modified "2026-05-17T00:23:43.847330"^^xsd:dateTime ;
    dct:title "Polymères électrostrictifs à forte déformation : Méthode d'élaboration et modélisation" ;
    dcat:accessURL <https://theses.hal.science/tel-00701539> .

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    foaf:name "test_moissonnage_selune" .

<https://theses.hal.science/tel-00701539> a foaf:Document .