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Article

Analysis of the Fire Behavior of Polymers (PP, PA 6 and PE-LD) and Their Improvement Using Various Flame Retardants

1
Federal Testing Center TGM, Department of Plastics Technology and Environmental Engineering, Wexstrasse 19-23, 1200 Wien, Austria
2
Montanuniversitaet Leoben, Polymer Processing, Otto-Gloeckel-Strasse 2, 8700 Leoben, Austria
3
Laboratory for Polymer Engineering (LKT) at TGM, Wexstrasse 19-23, 1200 Wien, Austria
4
Polymer Competence Center Leoben GmbH, Roseggerstraße 12, 8700 Leoben, Austria
*
Author to whom correspondence should be addressed.
Materials 2020, 13(24), 5756; https://doi.org/10.3390/ma13245756
Received: 23 October 2020 / Revised: 10 December 2020 / Accepted: 14 December 2020 / Published: 16 December 2020
(This article belongs to the Special Issue Structure Property Relationship of Polymeric Materials)
The fire behavior of polymers is examined primarily with the time-dependent heat release rate (HRR) measured with a cone calorimeter. The HRR is used to examine the fire behavior of materials with and without flame retardants, especially Polypropylene (PP-Copo) and Polyethylene (PE-LD). Polypropylene is stored for up to 99 days under normal conditions and the heat release rate shows especially changes about 100 s after irradiation with cone calorimeter, which may be caused by aging effects. The effect of crosslinking to the burning behavior of PP was examined too. Polyamides (PA 6) are irradiated with a radiation intensity of 25 kW/m2 to 95 kW/m2 and fire-related principles between radiation intensity and time to ignition can be derived from the measurement results. In order to comprehensively investigate the fire behavior of PP (also with flame retardant additives), the samples were also exposed to a flame, according to UL 94 with small power (50 W) and is inflamed with the power of a few 100 W. The irradiation causes different trigger mechanisms for the flame retardant additives in a plastic than the flame exposure. It is shown that the compound, which is favorable for irradiation, is not necessarily good for flame exposure. It can be seen that expandable graphite alone or with the addition of other additives is a very effective flame retardant for PP. View Full-Text
Keywords: cone calorimeter; UL 94; polyethylene; polypropylene; polyamide; flame retardants; crosslinking; aging cone calorimeter; UL 94; polyethylene; polypropylene; polyamide; flame retardants; crosslinking; aging
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MDPI and ACS Style

Hohenwarter, D.; Mattausch, H.; Fischer, C.; Berger, M.; Haar, B. Analysis of the Fire Behavior of Polymers (PP, PA 6 and PE-LD) and Their Improvement Using Various Flame Retardants. Materials 2020, 13, 5756. https://doi.org/10.3390/ma13245756

AMA Style

Hohenwarter D, Mattausch H, Fischer C, Berger M, Haar B. Analysis of the Fire Behavior of Polymers (PP, PA 6 and PE-LD) and Their Improvement Using Various Flame Retardants. Materials. 2020; 13(24):5756. https://doi.org/10.3390/ma13245756

Chicago/Turabian Style

Hohenwarter, Dieter; Mattausch, Hannelore; Fischer, Christopher; Berger, Matthias; Haar, Bernd. 2020. "Analysis of the Fire Behavior of Polymers (PP, PA 6 and PE-LD) and Their Improvement Using Various Flame Retardants" Materials 13, no. 24: 5756. https://doi.org/10.3390/ma13245756

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