Design of highly tough poly(L-lactide)-based ternary blends for automotive applications
Abstract
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 (dn0.5 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
Origin : Publication funded by an institution
Licence : CC BY - Attribution
Licence : CC BY - Attribution