Brittle-to-ductile transition of PLA induced ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Brittle-to-ductile transition of PLA induced by macromolecular orientation
Auteur(s) :
Xu, Shanshan [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tahon, Jean-Francois [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
De Waele, Isabelle [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Stoclet, Grégory [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Gaucher, Valerie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tahon, Jean-Francois [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
De Waele, Isabelle [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Stoclet, Grégory [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Gaucher, Valerie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Titre de la revue :
Express Polymer Letters
Nom court de la revue :
Express Polym. Lett.
Numéro :
14
Pagination :
1034-1047
Éditeur :
Department of Polymer Engineering, Scientific Society of Mechanical Engineering
Date de publication :
2020-02-18
ISSN :
1788-618X
Discipline(s) HAL :
Chimie/Matériaux
Chimie/Polymères
Chimie/Polymères
Résumé en anglais : [en]
This work deals with the influence of biaxial orientation on the mechanical behavior of Polylactide (PLA) films.
Comparisons between a crystallizable grade and a non-crystallizable one have been made in order to separate ...
Lire la suite >This work deals with the influence of biaxial orientation on the mechanical behavior of Polylactide (PLA) films. Comparisons between a crystallizable grade and a non-crystallizable one have been made in order to separate the effect of macromolecular orientation from the potential influence of the crystalline phase induced during the thermomechanical treatment. While unstretched PLAs exhibited brittle behavior at room temperature, it was observed for both types of PLA the strains at break for biaxially drawn films were remarkably enhanced to values over 100%. This study highlights for the first time, in the case of PLA, that a critical molecular chain orientation of the amorphous phase is the necessary condition to induce a ductile behavior. In-situ small-angle X-ray scattering (SAXS) experiments and post-mortem microscopic observations have revealed that it is a change of elementary plastic deformation mechanisms that is at the origin of this Brittle-to-Ductile (B-D) transition.Lire moins >
Lire la suite >This work deals with the influence of biaxial orientation on the mechanical behavior of Polylactide (PLA) films. Comparisons between a crystallizable grade and a non-crystallizable one have been made in order to separate the effect of macromolecular orientation from the potential influence of the crystalline phase induced during the thermomechanical treatment. While unstretched PLAs exhibited brittle behavior at room temperature, it was observed for both types of PLA the strains at break for biaxially drawn films were remarkably enhanced to values over 100%. This study highlights for the first time, in the case of PLA, that a critical molecular chain orientation of the amorphous phase is the necessary condition to induce a ductile behavior. In-situ small-angle X-ray scattering (SAXS) experiments and post-mortem microscopic observations have revealed that it is a change of elementary plastic deformation mechanisms that is at the origin of this Brittle-to-Ductile (B-D) transition.Lire moins >
Langue :
Anglais
Audience :
Internationale
Établissement(s) :
Université de Lille
CNRS
INRA
ENSCL
CNRS
INRA
ENSCL
Collections :
Équipe(s) de recherche :
Ingénierie des Systèmes Polymères
Date de dépôt :
2020-11-05T16:20:18Z
2020-11-07T21:09:03Z
2020-11-16T10:18:11Z
2020-11-07T21:09:03Z
2020-11-16T10:18:11Z