Nanoclay synergy in flame retarded/glass fibre reinforced polyamide 6

Date

2009-12-01

Author

IŞITMAN , Nihat Ali
GUNDUZ, Huseyin Ozgur
Kaynak, Cevdet

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Exfoliated clay nanocomposites of flame retarded/glass fibre reinforced polyamide 6 were prepared by twin-screw extrusion compounding. A flame retardant system based on phosphorus compounds and zinc borate was used at various levels in glass fibre reinforced PA6 and nanocomposites. Thermal stability and combustion behaviours were evaluated by TGA, LOI, UL94 and cone calorimetry. Substitution of a certain fraction of the flame retardant with nanoclays was found to significantly reduce the peak heat release rate and delay ignition in the cone calorimeter. Moreover, remarkable improvements were obtained in LOI along with maintained UL94 ratings. Residue characterization by FTIR, XRD and SEM ascribed the enhanced flame retardancy of nanocomposite formulations to the formation of a glassy boron/aluminium phosphate barrier reinforced by clay layers at the nanoscale. The physically strong and consolidated barriers formed from nanocomposites were much more effective in impeding heat and mass transfer compared to those from conventional formulations.

Subject Keywords

Flame Retardancy, Nanocomposite, Synergy, Phosphorus Compounds, Polyamide

URI

https://hdl.handle.net/11511/36887

Journal

POLYMER DEGRADATION AND STABILITY

DOI

https://doi.org/10.1016/j.polymdegradstab.2009.08.010

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

N. A. IŞITMAN, H. O. GUNDUZ, and C. Kaynak, “Nanoclay synergy in flame retarded/glass fibre reinforced polyamide 6,” POLYMER DEGRADATION AND STABILITY, pp. 2241–2250, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36887.