Journal
POLYMER DEGRADATION AND STABILITY
Volume 93, Issue 11, Pages 2019-2024Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2008.02.013
Keywords
Polyamide-6; Nanocomposite; Fire retardant; Solid state NMR; Dispersion
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The obvious aspect of nanodispersion and its role when investigating fire retardancy is not often clearly commented upon in the literature. Polymer clay nanocomposites can exhibit different morphologies and these might have consequences for their fire behaviour. Using solid state NMR to quantify the nanodispersion of organoclay in polyamide-6 (PA-6), we have prepared by melt blending PA-6/clay nanocomposite exhibiting different nanomorphologies. NMR results are consistent with transmission electron microscopy (TEM) images but the advantage of NMR is that it is representative of the whole sample and provides a precise quantification. PA-6 nanocomposites exhibit significant reduction of PHRR but the nanomorphology (exfoliation, intercalation and presence of tactoids) does not play any significant role. In other words, we have clearly shown that if nanodispersion is achieved, polymer/clay nanocomposite should exhibit fire retardant properties. (c) 2008 Elsevier Ltd. All rights reserved.
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