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|Type:||Artigo de periódico|
|Title:||Poly(vinyl chloride)/Metallic Oxides/Organically Modified Montmorillonite Nanocomposites: Fire and Smoke Behavior|
|Abstract:||Nanocomposites of poly(viny] chloride), metallic oxides (copper, molybdenum, and zinc), and organically modified montrnoriflonite (O-MMT) were prepared in a melt-blending or intercalation-in-the-molten state process, and their morphology was assessed with X-ray diffraction and transmission electron microscopy. The formation of an intercalated/partially exfoliated hybrid microstructure was confirmed in every situation studied. The combustion and smoke emission properties were studied with cone calorimetry, limiting oxygen index, and thermogravimetry (TG) coupled with mass spectroscopy (MS). The results reveal that the metallic oxides had a significant effect on both the combustion properties and smoke suppression, whereas O-MMT only affected these properties discretely. Little interaction was observed in the joint use of these additives. The results also confirm the anticipation of dehydrochlorination, reductive coupling, and benzene suppression mechanisms resulting from the presence of copper, molybdenum, and zinc metals; these were indicated by the increase in carbonaceous char residue and the significant reduction in benzene formation, in this case indicated in the TG/MS measurements obtained. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 116: 946-958, 2010|
poly(vinyl chloride) (PVC)
|Editor:||John Wiley & Sons Inc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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