Journal
EXPRESS POLYMER LETTERS
Volume 15, Issue 5, Pages 445-458Publisher
BUDAPEST UNIV TECHNOL & ECON
DOI: 10.3144/expresspolymlett.2021.38
Keywords
polymer composites; flame retardancy; thermoplastic polyurethane elastomer; nickel citrate; ammonium polyphosphate
Categories
Funding
- National Natural Science Foundation of China [51776101]
- Project of the State Administration of Work Safety [Shandong-00392017AQ]
- Shandong Provincial Natural Science Foundation of China [ZR2019MEE114]
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The combination of nickel citrate and ammonium polyphosphate improves the flame retardancy of TPU composites and reduces the total heat release.
In this work, nickel citrate (NC) was combined with ammonium polyphosphate (APP) to improve the flame retardance of thermoplastic polyurethane (TPU). And, the influence of nickel citrate on the flame retardance of TPU/APP composites was investigated by cone calorimeter test (CCT), thermogravimetric analysis/infrared spectrometry (TG-IR), scanning electron microscope (SEM), gas chromatography/mass spectrometry (GC-Ms), and X-ray photoelectron spectrometer (XPS), respectively. It has been found the combination of NC and APP improved the flame retardancy and reduced the total heat release (THR) of TPU composites. The THR value of TPU/APP/NC0.5 was reduced by 20.7% at 750 s compared with that of TPU/APP. The flame retardancy of TPU composites and the graphitization degree of char residue from TPU composites were improved by the combination of both NC and APP. This work provided a new way to improve the flame retardancy of polymer composites.
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