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Nanoindentation hardness and macroscopic mechanical behaviors in filled elastomeric nanocomposites

Communication sans acte
Author
BENTOUMI, Mohamed
242506 Université Ferhat-Abbas Sétif 1 [Sétif] [UFAS1]
MDARHRI, A.
186562 Laboratoire de Minéralogie et Cosmochimie du Muséum [LMCM]
NOURDINE, A.
764 Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
EL ABOUDI, I.
60436 Laboratoire de Chimie Moléculaire et Environnement [LCME]
BELKYAL, I.
186562 Laboratoire de Minéralogie et Cosmochimie du Muséum [LMCM]
IOST, Alain
ccMONTAGNE, Alex
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/11621
Date
2016

Abstract

Carbon black (CB) filled semi-crystalline ethylene butyl acrylate (EBA) copolymer networks are investigated to probe for the CB particles dependence of the deformation behavior from nano-to micrometers length scales of samples which are submitted to nanoindentation characterization. With respect to this purpose, the phenomenology for hardness (H) response in these materials indicates a typical increase of the hardness by decreasing the indentation depth (h) similar to the observed behavior in elastomeric materials. This behavior can be related to the change of the mesostructure, formed by the heterogeneous three-dimensional interconnected network of polymer and of aggregates of CB particles. Furthermore, The CB amount is found to increase the resistance of composite under the action of a mechanical stress. The H-h curves were then compared to some analytical models and correlated to a tensile macroscopic behavior in order to highlight the involved deformation mechanisms with length scale. A complementary set of characterizations such as profilometry and atomic force microscopy probes were also employed to best understand of those mechanisms.

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