Design of highly tough poly(L-lactide)-based ternary blends for automotive applications

Amani Bouzouita (1, 2, 3) , Cédric Samuel (1, 2) , Delphine Notta-Cuvier (3) , Jérémy Odent (1, 2) , Franck Lauro (3) , Philippe Dubois (1, 2) , Jean-Marie Raquez (1, 2)

1 LPCM - Laboratory of Polymeric and Composite Materials, Université de Mons-Hainaut
2 CIRMAP - Centre d'Innovation et de Recherche en Matériaux Polymères
3 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201

Technical renewable poly(L-lactide) (PLA)-based blends represent an elegant way to achieve attractive properties for engi-neering applications. Recently, the miscibility between PLA and poly(methyl methacrylate) (PMMA) gave rise to new formulationswith enhanced thermo-mechanical properties but their high brittleness still remains a challenge to be overcome. This work herefocuses on rubber-toughened PLA/PMMA formulations for injection-molding processes upon the addition of a commercially avail-able ethylene-acrylate impact modifier (BS). The miscibility between PLA and PMMA is not altered by the presence of BS but theincorporation of BS (17% by weight) into a PLA/PMMA matrix could enhance both ductility and toughness of PLA/PMMA blendsfor PMMA content up to 50 w t %. An optimum range of particle sizes (dn0.5 mm) of the dispersed domains for high impacttoughness is identified. These bio-based ternary blends appear as promising alternatives to petro-sourced blends such as ABS-basedblends in engineering injection-molding parts

Mots clés: "biopolymers and renewable polymers"; "blends"; "mechanical properties"; "morphology"

Domaines: Mécanique [physics.med-ph]

Amani Bouzouita, Cédric Samuel, Delphine Notta-Cuvier, Jérémy Odent, Franck Lauro, et al.. Design of highly tough poly(L-lactide)-based ternary blends for automotive applications. Journal of Applied Polymer Science, 2016, 133 (19), ⟨10.1002/app.43402⟩. ⟨hal-03446635⟩