Red phosphorus as a flame retardant for a thermoplastic nitrogen-containing polymer
1984; Elsevier BV; Volume: 20; Issue: 11 Linguagem: Inglês
10.1016/0014-3057(84)90134-4
ISSN1873-1945
AutoresJ.R.A. Broadbent, Marcelo M. Hirschler,
Tópico(s)Fire dynamics and safety research
ResumoStudies were made of the flame-retardant and smoke-suppressant activity of red phosphorus, in the presence of a brominated (decabromobiphenyl) and/or a nitrogenated (melamine) compound, on acrylonitrile-butadiene-styrene terpolymer. These studies were complemented by simultaneous thermal analyses of the polymeric systems. Red phosphorus is oxidised on heating and the thermal decomposition of any system containing this additive includes a substantial weight gain stage at ca 700 K. Melamine is volatilised very early on and thereafter acts only as a smoke suppressant in the gas phase. Decabromobiphenyl and red phosphorus interact positively in decreasing the flammability of the substrate, particularly at atomic ratios not lower than stoichiometric. The acrylonitrile content in ABS is very important, suggesting that the additives act mainly in the gas phase but that they also form some sort of charry layer on the polymer surface.
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