Understanding UL 94 fire behaviour: The battle between glass fibres and melamine cyanurate in polyamide 6

  • The individual and collective impacts of additives in melt dripping behaviour were studied under UL 94 vertical test conditions. A set of polyamide 6 (PA6) based materials compounded with melamine cyanurate (MCA) – a ˝dripping agent˝ – and glass fibre (GF) – a ˝non-dripping agent˝ - was investigated in detail. Dripping quantification was carried out during first and second ignition. The materials and their drops were investigated with respect to thermal decomposition, melt viscosity, and others properties. PA6 with V-2 classification improves to V-0 when MCA is added; and is worsened to HB in presence of glass fibre. Together, PA6/GF/MCA achieved V-2. The non-flaming drops of PA6/MCA are formed by oligomeric fragments. The flaming drops of PA6/GF contain a high amount of glass fibre. The dripping behaviour of PA6/GF/MCA under fire is a complex response of the specimen, but not explained by an easy superposition of the materials’ properties. The dripping behaviour is influenced by theThe individual and collective impacts of additives in melt dripping behaviour were studied under UL 94 vertical test conditions. A set of polyamide 6 (PA6) based materials compounded with melamine cyanurate (MCA) – a ˝dripping agent˝ – and glass fibre (GF) – a ˝non-dripping agent˝ - was investigated in detail. Dripping quantification was carried out during first and second ignition. The materials and their drops were investigated with respect to thermal decomposition, melt viscosity, and others properties. PA6 with V-2 classification improves to V-0 when MCA is added; and is worsened to HB in presence of glass fibre. Together, PA6/GF/MCA achieved V-2. The non-flaming drops of PA6/MCA are formed by oligomeric fragments. The flaming drops of PA6/GF contain a high amount of glass fibre. The dripping behaviour of PA6/GF/MCA under fire is a complex response of the specimen, but not explained by an easy superposition of the materials’ properties. The dripping behaviour is influenced by the interaction and concurrence of the different phenomena.zeige mehrzeige weniger

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Metadaten
Autor*innen:Analice Turski Silva Diniz
Koautor*innen:Bernhard Schartel
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2018
Organisationseinheit der BAM:7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.5 Technische Eigenschaften von Polymerwerkstoffen
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau
Freie Schlagwörter:Dripping; Flammability; Melamine cyanurate; Polyamide; UL 94
Themenfelder/Aktivitätsfelder der BAM:Infrastruktur
Infrastruktur / Fire Science
Veranstaltung:5th International Symposium on Flame-Retardant Materials & Technologies, ISFRMT 2018
Veranstaltungsort:Hangzhou, China
Beginndatum der Veranstaltung:14.06.2018
Enddatum der Veranstaltung:16.06.2018
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:07.08.2018
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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