摘要
利用热分析技术及卤酸气逸出装置,实验研究了含溴材料热解过程中溴化氢的逸出规律,结果表明:当升温速率为20℃/min时,2.4.6-三溴苯醚、八溴醚和十溴二苯乙烷在40mL/min的氮气气氛下分两个阶段进行热分解,而四溴双酚A、十溴二苯醚和溴化环氧树脂只有一个较明显的热分解阶段。6种含溴材料热解后有2.0%～20.7%的残余。随着停留时间的延长、升温速率的增加和氧含量的减少,溴化氢释放量呈线性增长。而热解温度的升高和空气流量的增加在一定范围内会使溴化氢的释放量增加,超过一定值后又会抑制溴化氢的逸出。
The hydrogen bromide escaping rules in the pyrogena tion process of hrominated flame retardants were studied in the halogen acid gas escaping device with thermal analysis technology. The results showed that when the heating rate is 20℃/ rain, and in the air condition of 40 mL/min nitrogen, 2.4.6-- tribromobenzene ether, dibromopropyl ether and decabromodi phenylethane are decomposed in two phases, tetrabromobisphenola, decabromodiphenyl oxide and brominated epoxy resin are decomposed in one phases. The percent of the giblets of these six kinds of brominated flame retardants is 2. 0%-20. 7%. While the static time of pyrogenation is longer, the heating rate is bigger and the oxygen concentration is smaller, the release quantity of HBr increases in linearity as these factors add up. While the temperature of thermal decomposition or air flux is higher in the certain value, the release quantity of HBr increa ses, and the release quantity of HBr will reduce if the tempera ture of thermal decomposition and air flux exceed that value.
出处
《消防科学与技术》
CAS
北大核心
2012年第9期977-980,共4页
Fire Science and Technology
关键词
含溴材料
溴化氢
TGA
brominated flame retardants
hydrogen bromide
thermogravimetry analysis
