聚磷酸铵
粉尘爆炸
热重分析
聚丙烯
点火系统
质量分数
最小点火能量
材料科学
热解
核化学
热稳定性
化学工程
化学
分析化学(期刊)
阻燃剂
复合材料
燃烧
环境化学
有机化学
物理
热力学
工程类
作者
Jie Yang,Yuan Yu,Yunhao Li,Qingwu Zhang,Liju Zheng,Taiyu Luo,Yifan Suo,Juncheng Jiang
标识
DOI:10.1016/j.psep.2019.08.015
摘要
This study experimentally investigated that the inerting effect of Ammonium Polyphosphate (APP) on characteristics of Polypropylene (PP) dust explosion. The results indicated that the maximum explosion pressure (Pmax), the explosion index (Kst) and the minimum explosion concentration (MEC) of PP powders were 8 bar, 257 bar m/s and 25 g/m3, respectively. Moreover, the minimum ignition energy (MIE) and the minimum ignition temperature (MIT) were 10 mJ and 335 °C, correspondingly for PP dust cloud. The explosion of PP powders could be inerted completely by 80 wt% APP. In addition, the MIE of PP powders increased when the mass fraction of APP increased. Furthermore, APP had a significant inerting effect on the MIT of PP dust cloud. The MIT of PP powders increased by 80 °C when the mass fraction of APP increased to 80 wt %. Thermal analysis results showed that the introduction of APP could improve the thermal stability of PP. Furthermore, thermogravimetric analysis/infrared (TG-IR) spectroscopy was employed to gain insights into the pyrolysis mechanism of the PP/APP mixtures. The TG-IR results showed that the volatilized products formed in the pyrolysis were H2O and NH3 which could dilute and consume oxygen in gas phase.
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