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Nanoclay and carbon nanotubes as potential synergists of an organophosphorus flame-retardant in poly(methyl methacrylate)
Date
2010-09-01
Author
Isitman, Nihat Ali
Kaynak, Cevdet
Metadata
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This study explores whether nanoparticles incorporated in polymers always act as synergists of conventional flame-retardant additives. For this purpose, two different filler nanoparticles, namely organically modified layered-silicate clay minerals or nanoclays and multi-walled carbon nanotubes, were incorporated in poly(methyl methacrylate) filled with an organophosphorus flame-retardant that acts through intumescence. Effective dispersion techniques specific to each nanoparticle were utilized and prepared samples were thoroughly characterized for their nanocomposite morphologies. Nanoclays were shown to outperform carbon nanotubes in respect of improving the fire properties of intumescent formulations assessed by cone calorimeter analysis. An intriguing explanation for the observed behaviour was the restriction of intumescence by strong carbon nanotube networks formed on the flaming surfaces during combustion contrary to enhanced intumescent chars by nanoclays. Carbon nanotubes surpassed nanoclays considering the thermal stability of intumescent formulations in thermogravimetry whereas mechanical properties were significantly superior with nanoclays to those with carbon nanotubes.
Subject Keywords
Mechanical properties
,
Thermal stability
,
Nanocomposite
,
Flame retardancy
,
Carbon nanotube
,
Nanoclay
URI
https://hdl.handle.net/11511/46671
Journal
POLYMER DEGRADATION AND STABILITY
DOI
https://doi.org/10.1016/j.polymdegradstab.2010.06.013
Collections
Department of Metallurgical and Materials Engineering, Article
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N. A. Isitman and C. Kaynak, “Nanoclay and carbon nanotubes as potential synergists of an organophosphorus flame-retardant in poly(methyl methacrylate),”
POLYMER DEGRADATION AND STABILITY
, pp. 1523–1532, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46671.