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Reduction in smoke emitted and fire hazard presented by flexible poly (vinyl chloride) through novel synthesis of SnO 2 supported by activated carbon spheres
Author(s) -
He Shaorui,
Wu Weihong,
Zhang Mengjiao,
Han Hongda,
Jiao Yunhong,
Qu Hongqiang,
Xu Jianzhong
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4362
Subject(s) - cone calorimeter , thermogravimetric analysis , materials science , char , vinyl chloride , fire retardant , smoke , thermal stability , composite number , chemical engineering , composite material , pyrolysis , polymer , organic chemistry , copolymer , chemistry , engineering
A novel catalyst consisting of SnO 2 supported by activated carbon spheres (ACS), referred to as “ACS@SnO 2 ,” was demonstrated as being much more efficient than either ACS or SnO 2 alone. As such, it is capable of improving the thermal stability and flame retardancy of flexible poly (vinyl chloride) (fPVC). The resulting ACS@SnO 2 composite exhibits a higher reactivity and excellent stability due to the presence of evenly dispersed SnO 2 particles attached to the ACS, as well as the high degree of graphitization of the ACS. Smoke suppression and the synergistic flame‐retardant effect of the ACS@SnO 2 on the fPVC were thoroughly investigated by performing a cone calorimeter test and thermogravimetric analysis. The cone calorimeter test data reveal that the addition of the ACS@SnO 2 greatly improved the flame retardancy of the fPVC, with 32% and 58.4% decreases in the peak heat release rate and smoke production rate, respectively. This is attributed to the formation of a continuous and compact protective layer and the synergistic effects of the ACS and SnO 2 in promoting the ability of the fPVC to isolate heat and oxygen. Furthermore, the ACS@SnO 2 /fPVC composite produced greatly increased amounts of char residue, thereby attenuating the fire hazard presented by fPVC composites.