Journal
POLYMER DEGRADATION AND STABILITY
Volume 97, Issue 3, Pages 248-256Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2011.12.021
Keywords
Fire retardancy; Biodegradability; PLA; Clay; Polymer nanocomposites
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Funding
- 'Marie Curie Amarout Europe Programme' fellowship (FP7 Marie Curie Action - People COFUND Program)
- Nanyang Technological University
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To understand and improve the fire retardancy behavior of polylactic acid, we have incorporated two structurally different additives, sepiolite and organically modified montmorillonite. A novel approach (combination of electrospinning and extrusion/injection molding) is employed to address critical issues like char enhancement as well as the homogeneity/uniformity of the inorganic barrier during combustion of polymer nanocomposites. Fundamental knowledge is gained on the mechanisms of fire retardancy, particularly with samples of different thicknesses (thermally thin versus thermally intermediate/thick). Volumetric imaging of the residues provided a deeper understanding of the formation or the evolution of the inorganic barrier. Considerable insight on the dependency of biodegradation on the environment (primarily) and on the compromising effect of high aspect ratio nanoparticles is also obtained. This knowledge has a broader scientific impact and is critical to design the new generation of eco-benign flame retardant and biodegradable polymer nanocomposites. (C) 2012 Elsevier Ltd. All rights reserved.
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