甲基苯基聚硼硅氧烷对PC/ABS合金阻燃性能的影响  

Influence of Methylphenyl Polyborosiloxane on Flame Retardancy of PC/ABS

作　　者：王雪芹[1] 周文君[1] 张敬礼[1] 黄浩[1] 

机构地区：[1]杭州师范大学材料与化学化工学院,浙江杭州310036

出　　处：《中国塑料》2013年第12期41-46,共6页China Plastics

基　　金：浙江省公益性技术应用研究计划项目(2011C31047)

摘　　要：采用二步合成法制备了甲基苯基聚硼硅氧烷(PB)阻燃剂,用热失重分析、锥形量热分析和极限氧指数测试研究了PB对聚碳酸酯/丙烯腈-丁二烯-苯乙烯共聚物(PC/ABS)合金阻燃性能的影响。结果表明,当硅烷/硼酸配比为1∶1时制备的PB阻燃效果最好,在PC/ABS合金中添加5%(质量分数,下同)该PB阻燃剂可使合金的极限氧指数从24.1%提高到34.1%;PB可降低PC/ABS合金的热降解速率,提高残炭量;添加PB可使PC/ABS合金的火灾性能指数提高,显著降低燃烧过程中的热、烟及CO、CO2等有害气体的释放量,有效提高PC/ABS合金的阻燃性能,降低火灾安全隐患。Polyborosiloxane flame retardants （PB） were prepared through a two-step synthesis process. Flame retardancy of the polyborosiloxane in polycarbonate/aerylonitrile-butadiene-styrene copolymer （PC/ABS） alloy was studied using thermogravimetric analysis, cone calorimeter analysis, and limited oxygen index. It was found that the PB prepared from a 1 ： 1 ratio of silane/ boric acid provided the most effective flame retardancy in PC/ABS system. Introducing 5 wt G of PB into PC/ABS alloys increased the limited oxygen index from 24. 1 % to 34. 1 %. Presence of PB reduced the thermal degradation rate and promote the formation of carbon residue during combustion. Moreover, adding PB increased the fire performance index of the PC/ABS alloy, significantly reduced generation of heat and emissions of smoke, CO and CO2 during the combus- tion.

关 键 词：聚碳酸酯 丙烯腈-丁二烯-苯乙烯共聚物 聚硼硅氧烷 极限氧指数 阻燃 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]