Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 27, Issue 6, Pages 781-788Publisher
WILEY
DOI: 10.1002/pat.3714
Keywords
flame-retardant; PLA; DOPO; quenching effect
Categories
Funding
- National Nature Science Foundation [21374003]
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The flame-retardant polylactic acid (PLA) has been prepared via mixing the flame retardant TGIC-DOPO derived from phosphaphenanthrene and triazine groups into matrix. The flame retardancy of TGIC-DOPO/PLA composites was characterized using the limiting oxygen index (LOI), vertical burning test (UL94), and cone calorimeter test. Results reveal that the 10% TGIC-DOPO/PLA composite obtained 26.1% of LOI and passed UL94 V-0 rating. The flame-retardant mechanism of PLA composites was characterized via thermogravimetric analysis (TGA), pyrolysis gas chromatography/ mass spectroscopy, and TGA-Fourier transform infrared. It discloses that TGIC-DOPO promoted PLA decomposing and dripping early, and it also released the fragments with quenching and dilution effects. These actions of TGIC-DOPO contribute to reducing the burning intensity and extinguishing the fire on droplets, thus imposing better flame retardancy to PLA. When TGIC-DOPO was partly replaced by melamine cyanuric with dilution effect and hexa-phenoxy-cyclotriphosphazene with quenching effect in composites respectively, the results confirm that TGIC-DOPO utilize well-combination in dilution effect and quenching effect to flame retard PLA. Copyright (C) 2015 John Wiley & Sons, Ltd.
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