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Flame‐retardant properties and synergistic effect of ammonium polyphosphate/aluminum hydroxide/mica/silicone rubber composites
Author(s) -
Hu Sheng,
Tan ZhiWei,
Chen Fei,
Li JunGuo,
Shen Qiang,
Huang ZhiXiong,
Zhang LianMeng
Publication year - 2020
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.2831
Subject(s) - ammonium polyphosphate , mica , cone calorimeter , materials science , fire retardant , composite material , flammability , thermogravimetric analysis , thermal decomposition , scanning electron microscope , chemical engineering , combustion , char , chemistry , organic chemistry , engineering
Summary The flammability behaviors of ammonium polyphosphate/aluminum hydroxide/mica/silicone rubber (APP/Al[OH] 3 /mica/SiR) ceramifying composites containing APP, Al[OH] 3 , and mica are investigated by cone calorimeter test. The thermal degradation and the synergistic effect of APP/Al(OH) 3 /mica/SiR composites are investigated by thermal gravimetric analysis, X‐ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and X‐ray photoelectron spectroscopy. APP/Al(OH) 3 /mica/SiR composites with 25 wt% of APP, 20 wt% of Al(OH) 3 , 25 wt% of mica, and 30 wt% SiR presents a much lower total heat release, the value of peak heat release rate (PHRR), the maximum average heat release rate, the longest time to ignition, and time to the PHRR ( t PHRR ), compared with the flame‐retardant properties from composites with filler of APP and mica or APP and Al(OH) 3 alone. The results indicate that there is an excellent synergism in APP, Al(OH) 3 , and mica, which endows APP/Al(OH) 3 /mica/SiR composites with both good flame retardancy and fire prevention. The study on the synergism effect between fire prevention and flame retardancy of APP/Al(OH) 3 /mica/SiR composites indicates that compounds containing P‐O‐Al are formed due to the reaction between APP and Al(OH) 3 during combustion in the early stage and a coherent, dense, and sealed structure is formed due to the reaction in mica, phosphates, and the thermal decomposition products of SiR during combustion in the later stage.