阻燃高抗冲聚苯乙烯热降解研究  

Thermal Decomposition of Flame-retarded High Impact Polystyrene

作　　者：吴中伟[1] 焦清介[1] 臧充光[1] 兰慧[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《化学通报》2008年第12期940-945,共6页Chemistry

摘　　要：利用热失重-红外联用仪(TGA-IR)分析了高抗冲聚苯乙烯(HIPS)的热降解过程,结合热裂解气相色谱-质谱联用仪(Py-GC/MS)分析了HIPS的热裂解产物,利用化学方程式阐述了HIPS自由基降解反应。对十溴二苯乙烷、三氧化二锑复配阻燃体系的热降解过程进行了研究,讨论了阻燃HIPS的凝聚相阻燃、气相阻燃机理。实验表明,HIPS燃烧时主要发生β-断裂,大量烟雾主要由苯乙烯、甲苯、α-甲基苯乙烯、苯乙烷、丁二烯等组成,其中凝聚相主要是1,3,5-三苯基苯乙烯及其他部分低聚物。在不同的温度下,阻燃HIPS的热裂解产物不同,在较高的温度下,小分子化合物明显增多。The thermal decomposition process and decomposed products of high impact polystyrene （HIPS） were analyzed by using TGA-IR and Py-GC/MS, respectively. Moreover, the radical reaction mechanism of the degradation of HIPS was discussed. The degradation process of flame-retarded system of decabromdiphenyl ethane （DBDPE） and antimony trioxide （Sb2O3 ） and the flame-retarded mechanism of condensed phase and gas phase for flame-retarded HIPS were investigated. The results showed that the β-scission of HIPS happened in combustion mainly; a mass of smog was composed of styrene, toluene, a-methyl-styrene, ethylbenzene, butadiene and so on. The condensed phase was composed of the products of 1,3,5-triphenyl-benzene and other oligomers. At different temperature, the pyrolyzed products of flame-retarded HIPS were different, and the small molecular compounds evidently increased at high temperature.

关 键 词：高抗冲聚苯乙烯 热降解 十溴二苯乙烷 阻燃 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业] TQ323.6