Red Phosphorus-Controlled Decomposition for Fire Retardant PA 66

  • The thermal degradation and the combustion behavior of glass fiber-reinforced PA 66 materials containing red phosphorus were investigated. Thermogravimetry (TG), TG coupled with FTIR, and TG coupled with mass spectroscopy were used to investigate the thermal decomposition. The flame retardant red phosphorus was investigated with respect to the decomposition kinetics and the release of volatile products. The combustion behavior was characterized using a cone calorimeter. Fire risks and fire hazards were monitored versus external heat fluxes between 30 and 75 kW/m2. Red phosphorus acts in the solid phase and its efficiency depends on the external heat flux. The use of red phosphorus results in an increased amount of residue and in a corresponding decrease in total heat release. The decrease of the mass loss rate peak results in a corresponding decrease of the peak heat release. With increasing external heat flux applied the first effect on the total heat release decreases linearly,The thermal degradation and the combustion behavior of glass fiber-reinforced PA 66 materials containing red phosphorus were investigated. Thermogravimetry (TG), TG coupled with FTIR, and TG coupled with mass spectroscopy were used to investigate the thermal decomposition. The flame retardant red phosphorus was investigated with respect to the decomposition kinetics and the release of volatile products. The combustion behavior was characterized using a cone calorimeter. Fire risks and fire hazards were monitored versus external heat fluxes between 30 and 75 kW/m2. Red phosphorus acts in the solid phase and its efficiency depends on the external heat flux. The use of red phosphorus results in an increased amount of residue and in a corresponding decrease in total heat release. The decrease of the mass loss rate peak results in a corresponding decrease of the peak heat release. With increasing external heat flux applied the first effect on the total heat release decreases linearly, whereas the second effect on the peak heat release expands linearly. The investigation provides insight into the mechanisms of how the fire retardant PA 66 is achieved by red phosphorus controlling the degradation kinetics. Taking into account that a decrease of the volatile products also leads to a decrease of heat production in the flame zone and that the char acts as heat transfer barrier, a reduced pyrolysis temperature is suggested as a further feedback effect.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Bernhard Schartel, Ralf Kunze, Dietmar Neubert
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Journal of applied polymer science
Jahr der Erstveröffentlichung:2002
Verlag:Wiley InterScience
Verlagsort:Hoboken, NJ
Jahrgang/Band:83
Ausgabe/Heft:10
Erste Seite:2060
Letzte Seite:2071
Freie Schlagwörter:Cone calorimeter; Fire retardancy; PA 66; Red phosphorus; TG-FTIR
Veranstaltung:8th European Conference on fire retardant polymers
Veranstaltungsort:Alessandria, Italy
Beginndatum der Veranstaltung:2001-06-24
Enddatum der Veranstaltung:2001-06-27
DOI:https://doi.org/10.1002/app.10144
ISSN:0021-8995
ISSN:1097-4628
Verfügbarkeit des Volltexts:Weder Volltext-PDF noch papiergebundenes Belegexemplar vorhanden ("No Access")
Datum der Freischaltung:19.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:14.10.2002