超临界CO_2发泡阻燃聚苯乙烯研究  

Study on Flame Retardant Polystyrene Foamed by Supercritical Carbon Dioxide

作　　者：王亚桥 王文博[1] 余科松 陈鹏[1] 周洪福[1] 王向东[1] WANG Yaqiao;WANG Wenbo;YU Kesong;CHEN Peng;ZHOU Hongfu;WANG Xiangdong(School of Materials Science and Engineering, Beijing Technology and Business University, Beijing 100048. China)

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《中国塑料》2017年第12期46-50,共5页China Plastics

基　　金：北京工商大学2017年研究生科研能力提升计划

摘　　要：采用水滑石(HT)为热稳定剂,以超临界CO_2为发泡剂,研究了六溴环十二烷(HBCD)阻燃聚苯乙烯(PS)的阻燃机理和发泡行为。结果表明,在一定加工条件下,适量的HT可以显著提高HBCD的热稳定性,但是过量的HT会降低PS的阻燃性能;加工工艺尤其是剪切流场的强度及加工温度对HBCD的热稳定性有重要影响;采用超临界CO_2进行发泡成型后的阻燃PS泡沫的极限氧指数可达到30%以上。Polystyrene （P S ） was modified with hexabromocyclododecane （HBCD） as a flame retardant and then was foamed by using supercritical CO2 as a foaming agent and hydrotalcite（HT） as a thermal stabilizer. The flame-retardant mechanism and foaming behavior of flame-retardant PS were studied. The results indicated that the thermal stability of HBCD could be improved by adding a proper amount of HT. However, the excessive amount of HT reduced the flameretardancy of PS. The thermal stability of HBCD was significantly influenced by the processing technologies and especially by shear flow field and processing temperature. The flame-retardant PS achieved a limiting oxygen index above 30 vol % through foaming with supercritical carbon dio-xide.

关 键 词：六溴环十二烷 水滑石 热稳定性 阻燃 聚苯乙烯泡沫 

分 类 号：TQ328.4[化学工程—合成树脂塑料工业]