Experimental and theoretical study of uniaxial deformation of amorphous poly(ethylene terephthalate) above glass transition temperature

Abstract : Uniaxial deformation of amorphous thick and massive poly(ethylene terephthalate) (PET) samples above the glass transition temperature has been studied in the temperature range relevant to the stretch–blow moulding process of PET bottles. A video controlled system coupled to a novel clamping device, together with accurate control of the thermal gradient in the material, make it possible to determine true stress v. true strain data at constant true strain rate up to very high strains of ∼2.5. The mechanical response of PET in these conditions is modelled as a molecular network exhibiting a rubber-like behaviour. Sufficiently far from the alpha transition, it is shown that the Edwards and Vilgis model is able to reproduce experimental data accurately, which also offers a relevant insight into the nature of the molecular networks. Closer to the alpha transition, this purely hyperelastic model needs refining and improving to take into account an additional non-elastic contribution.
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Plastics, Rubber and Composites, Maney Publishing, 2013, 11th International Conference on Deformation, Yield and Fracture of Polymers, 30 (2), pp.48 - 55. 〈10.1179/146580101101541435〉
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01654657
Contributeur : Brigitte Hanot <>
Soumis le : lundi 4 décembre 2017 - 11:33:32
Dernière modification le : mardi 27 mars 2018 - 16:06:17

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Eric Gorlier, Jean-François Agassant, Jean-Marc Haudin, Noëlle Billon. Experimental and theoretical study of uniaxial deformation of amorphous poly(ethylene terephthalate) above glass transition temperature. Plastics, Rubber and Composites, Maney Publishing, 2013, 11th International Conference on Deformation, Yield and Fracture of Polymers, 30 (2), pp.48 - 55. 〈10.1179/146580101101541435〉. 〈hal-01654657〉

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