High Heat Resistance Can Be Deceiving: Dripping Behavior of Polyamide 4.6 in Fire
Abstract: Polyamide 4.6 (PA46) is a high‐heat‐resistant polymer, but it has no dripping resistance under fire. Three commercial grades of PA46 are investigated under UL 94 vertical fire test conditions. Their performances are discussed based on the materials' structural, thermal, and rheological properties. PA46 presents flaming drops, whereas dripping is prevented in the flame‐retarded PA46. Friction‐modified PA46 has increased flaming dripping. Temperature profiles of the specimens under fire and the temperature of the drops are measured by thermocouples. A UL 94 vertical test configuration consisting of two flame applications is designed to assess the quantitative dripping behavior of the set of materials by the particle finite element method (PFEM). Polymer properties (activation energy and Arrhenius coefficient of decomposition, char yield, density, effective heat of combustion, heat of decomposition, specific heat capacity, and thermal conductivity) in addition to rheological responses in high temperatures are estimated and measured as input parameters for the simulations. The dripping behavior obtained by simulated materials corresponds with the experimental results in terms of time and drop size. A consistent picture of the interplay of the different phenomena controlling dripping under fire appears to deliver a better understanding of the role of different materials’ properties.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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High Heat Resistance Can Be Deceiving: Dripping Behavior of Polyamide 4.6 in Fire ; day:12 ; month:05 ; year:2023 ; extent:11
Macromolecular materials and engineering ; (12.05.2023) (gesamt 11)
- Creator
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Turski Silva Diniz, Analice
Marti, Julio Marcelo
Schartel, Bernhard
- DOI
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10.1002/mame.202300091
- URN
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urn:nbn:de:101:1-2023051215122945636410
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:53 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Turski Silva Diniz, Analice
- Marti, Julio Marcelo
- Schartel, Bernhard
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