Controlling the distribution of fire retardants in poly(lactic acid) by fused filament fabrication in order to improve its fire behaviour

This study focused on the development of skin/core structures with flame-retarded poly (lactic acid) (PLA) compositions, by additive manufacturing. For this purpose, the technique of Fused Filament Fabrication (FFF) was chosen. Plate samples were also manufactured by injection moulding for compariso...

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Bibliographic Details
Published in:Polymer degradation and stability 2019-05, Vol.163, p.143-150
Main Authors: Regazzi, Arnaud, Pucci, Monica Francesca, Dumazert, Loic, Gallard, Benjamin, Buonomo, Sylvain, Ravel, Romain, Lopez-Cuesta, José-Marie
Format: Article
Language:English
Subjects:
3-D printers
3D printing
Additive manufacturing
Bio-based polymers
Cone calorimeters
Engineering Sciences
Fire behaviour
Flame retardants
Fused deposition modeling
Injection molding
Mechanical properties
Plates (structural members)
Polylactic acid
Porosity
Three dimensional printing
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Summary:This study focused on the development of skin/core structures with flame-retarded poly (lactic acid) (PLA) compositions, by additive manufacturing. For this purpose, the technique of Fused Filament Fabrication (FFF) was chosen. Plate samples were also manufactured by injection moulding for comparison purpose. The nature of the flame retardants (FR), their contents and their distribution in the samples were varied. The fire behaviour was investigated by cone calorimeter tests. The microstructure was characterized and related to the fire performances of each flame-retarded PLA structure. The results showed a significant decrease of the time to ignition (TTI) of 3D printed samples compared to the injected ones, due to their higher porosity. However, for a given total FR content, concentrating FR close to the radiated surface proved to be a promising solution in order to optimize fire performance while preserving the mechanical properties of neat PLA. [Display omitted]
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2019.03.008