Fragility and molecular mobility in micro- and nano-layered PC/PMMA films

K. Arabeche 1 Laurent Delbreilh 1 J.-M. Saiter 1 G.H. Michler 2 R. Adhikari 3 E. Baer 4
1 AMME-LECAP EA 4528 International Laboratory - Laboratoire d’Etude et de Caractérisation des Amorphes et des Polymères
2 Martin-Luther-University Halle-Wittenberg
3 Tribhuvan University
4 Case Western Reserve University [Cleveland]
Abstract : The values of the fragility index of polycarbonate/poly(methylmetacrylate) multilayer films have been determined for materials having thicknesses varying from micro- to nano-scales. The influence of the layer thickness reduction down to 12 nm has been shown to have very different influence on the glass transition parameters of the two polymers. Polycarbonate has exhibited a huge sensitivity to such geometric scale modifications while no modification has been observed for PMMA. A large decrease of the fragility index m, has been observed for PC. This modification is proportional to length scale variations of molecular cooperative motions at Tg, ξ(Tg). In regard to the molecular structure of each polymer, these results show that this correlation between fragility index and ξ(Tg) is mainly associated to modifications of intermolecular interactions and local density. These material parameters are influencing the activation volume ΔV# which plays a role on the modification of the fragility index.
Keywords : Glass transition Fragility Nano-layered films
Type de document :
Article dans une revue
Liste complète des métadonnées
https://hal-normandie-univ.archives-ouvertes.fr/hal-02130064
Contributeur : Laurent Delbreilh <>
Soumis le : mercredi 15 mai 2019 - 15:15:12
Dernière modification le : vendredi 30 août 2019 - 01:13:58

Identifiants

Collections

COMUE-NORMANDIE | INSA-ROUEN | UNIROUEN | INSA-GROUPE

Citation

K. Arabeche, Laurent Delbreilh, J.-M. Saiter, G.H. Michler, R. Adhikari, et al.. Fragility and molecular mobility in micro- and nano-layered PC/PMMA films. Polymer, Elsevier, 2014, 55 (6), pp.1546-1551. ⟨10.1016/j.polymer.2014.02.006⟩. ⟨hal-02130064⟩

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

23