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Nano-building block based-hybrid organic–inorganic copolymers with self-healing properties

Article dans une revue avec comité de lecture
Auteur
POTIER, F.
93591 Université Pierre et Marie Curie - Paris 6 [UPMC]
GUINAULT, Alain
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
DELALANDE, S
136342 PSA Peugeot Citroën
SANCHEZ, C
93591 Université Pierre et Marie Curie - Paris 6 [UPMC]
RIBOT, F.
93591 Université Pierre et Marie Curie - Paris 6 [UPMC]
ROZES, L.
93591 Université Pierre et Marie Curie - Paris 6 [UPMC]

URI
http://hdl.handle.net/10985/8475
DOI
10.1039/c4py00172a
Date
2014
Journal
Polymer Chemistry

Résumé

New dynamic materials, that can repair themselves after strong damage, have been designed by hybridization of polymers with structurally well-defined nanobuilding units. The controlled design of cross-linked poly(n-butyl acrylate) (pBuA) has been performed by introducing a very low amount of a specific tin oxo-cluster. Sacrificial domains with non-covalent interactions (i.e. ionic bonds) developed at the hybrid interface play a double role. Such interactions are strong enough to cross-link the polymer, which consequently exhibits rubber-like elasticity behavior and labile enough to enable, after severe mechanical damage, dynamic bond recombination leading to an efficient healing process at room temperature. In agreement with the nature of the reversible links at the hybrid interface, the healing process can speed up considerably with temperature. 1H and 119Sn PFG NMR has been used to evidence the dynamic nature of these peculiar cross-linking nodes.

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