Thermal degradation and flame retardancy of fumaric acid in thermoplastic polyurethane elastomer

In this paper, fumaric acid (FA) which was a new type of environmental and low‐cost flame retardant was applied for thermoplastic polyurethane elastomer (TPU). The flame‐retardant properties of TPU were tested using limiting oxygen index, cone calorimeter test, smoke density test, and thermogravimet...

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Bibliographic Details
Published in:Polymers for advanced technologies 2019-02, Vol.30 (2), p.475-482
Main Authors: Wei, Zhibiao, Chen, Xilei, Jiao, Chuanmei
Format: Article
Language:English
Subjects:
Composite materials
Cone calorimeters
Constraining
Density
environmental
flame retardant
Flame retardants
Fourier transforms
Fumaric acid
Heat release rate
Infrared spectroscopy
Polyurethane resins
Smoke
Spectrum analysis
Thermal degradation
thermoplastic polyurethane elastomer
Urethane thermoplastic elastomers
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Summary:In this paper, fumaric acid (FA) which was a new type of environmental and low‐cost flame retardant was applied for thermoplastic polyurethane elastomer (TPU). The flame‐retardant properties of TPU were tested using limiting oxygen index, cone calorimeter test, smoke density test, and thermogravimetric/Fourier transform infrared spectroscopy. It has been proved that FA could improve the difficulty of the ignition of the sample; the limiting oxygen index value of the sample (FA‐4) increased by 29.7% when 2.0 wt% FA was added to TPU. The cone calorimeter test showed that FA can greatly reduce heat release and smoke production during the combustion process of TPU composites. For example, compared with the pure TPU, the peak heat release rate and total smoke release of the sample (FA‐4) with 2.0 wt% FA were decreased by 50.8% and 51.5% respectively. The results of smoke density test showed that the luminous flux of the samples contained 0.5 wt% FA was increased by 79.2% compared with the pure TPU. The TG results revealed that the sample of FA‐4 had higher char residue content compared with the sample of TPU. The results of thermogravimetric/Fourier transform infrared spectroscopy proved that FA could decrease the initial decomposition temperature for TPU composites and increase the release of CO2 and H2O. All results of test illustrated that FA had good flame‐retardant effect on TPU.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.4462