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The flame retardant and smoke suppression effect of fullerene by trapping radicals in decabromodiphenyl oxide/Sb 2 O 3 flame‐retarded high density polyethylene
Author(s) -
Guo Zhenghong,
Zhao Liping,
Fang Zhengping
Publication year - 2017
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.2433
Subject(s) - fire retardant , cone calorimeter , high density polyethylene , decabromodiphenyl ether , flammability , materials science , brominated flame retardant , radical , polyethylene , combustion , smoke , thermal stability , chemical engineering , composite material , chemistry , organic chemistry , char , engineering
Summary To improve the large release of smoke and heat for brominated flame retardants (BFRs) in fire hazard, fullerene (C 60 ) had been introduced in high density polyethylene (HDPE)/bromine flame retardant (Deca/Sb 2 O 3 , BFR in short) system in this study. The effects of C 60 on the thermal properties, flame retardant properties, rheological behaviors, and smoke release behaviors in HDPE/BFR blends were researched. During polymer thermal degradation, C 60 and BFR exhibited the trapping radical ability in condensed phase and gaseous phase, respectively. The intergrated effects of C 60 and BFR on the thermal stability and flammability of HDPE were studied by thermo‐gravimetry and cone calorimeter. It was indicated that the introduction of C 60 improved the thermal and thermo‐oxidative stability of HDPE/BFR blends. A remarkable advantage of adding C 60 was to reduce the peak heat release rate and the average specific extinction area, especially at higher concentration of C 60 . The analysis of rheological behaviors and pyrolysis products revealed that C 60 can capture alkyl radicals, chain radicals, and bromine radicals in the condensed phase, which was in favor of terminating the thermo‐oxidative decomposition and inhibiting the heat and smoke release of HDPE/BFR blends during combustion.