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The impact of metal oxides on the combustion behavior of ethylene – vinyl acetate coploymers containing an intumenscent flame retardant / Lei Wang in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012)

The impact of metal oxides on the combustion behavior of ethylene – vinyl acetate coploymers containing an intumenscent flame retardant [texte imprimé] / Lei Wang, Auteur ; Wei, Yang, Auteur ; Bibo Wang, Auteur . - 2012 . - pp. 7884-7890.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7884-7890
Mots-clés : Flame retardant Combustion
Résumé : The objective of this work was to compare the flame retardancy of intumescent flame retardant ethylene-vinyl acetate (EVA/IFR) composites containing different metal oxides including lanthanide oxide, iron oxide, the mixture of iron oxide and lanthanide oxide, and lanthanum ferrite nanocrystalline (LaFeO3). A novel compound containing iron and lanthanum, LaFeO3 was successfully prepared. The EVA/IFR composites with these different coadditives were then fabricated through a melt blending process. Thermogravimetric analysis data showed that these different coadditives could increase the char residue formation. Cone calorimeter results revealed that these different coadditives and IFR could dearly change the decomposition behavior of EVA and form a char layer on the surface of the composites, consequently resulting in efficient reduction of the flammability parameters, such as heat release rate, total heat release, average mass loss rate, average smoke extinction area, and so on. Moreover, significant improvements were obtained in limited oxygen index and Underwriters Laboratories 94 ratings. Among all of the samples, the fire risk of EVA/IFR/LaFeO3 system was the lowest. The residue characterization demonstrated that LaFeO3 could promote the formation of the homogeneous and compact intumescent char layer.
ISSN : 0888-5885
En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990302

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Mots-clés :	Flame retardant Combustion
Résumé :	The objective of this work was to compare the flame retardancy of intumescent flame retardant ethylene-vinyl acetate (EVA/IFR) composites containing different metal oxides including lanthanide oxide, iron oxide, the mixture of iron oxide and lanthanide oxide, and lanthanum ferrite nanocrystalline (LaFeO3). A novel compound containing iron and lanthanum, LaFeO3 was successfully prepared. The EVA/IFR composites with these different coadditives were then fabricated through a melt blending process. Thermogravimetric analysis data showed that these different coadditives could increase the char residue formation. Cone calorimeter results revealed that these different coadditives and IFR could dearly change the decomposition behavior of EVA and form a char layer on the surface of the composites, consequently resulting in efficient reduction of the flammability parameters, such as heat release rate, total heat release, average mass loss rate, average smoke extinction area, and so on. Moreover, significant improvements were obtained in limited oxygen index and Underwriters Laboratories 94 ratings. Among all of the samples, the fire risk of EVA/IFR/LaFeO3 system was the lowest. The residue characterization demonstrated that LaFeO3 could promote the formation of the homogeneous and compact intumescent char layer.
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=25990302