溴化聚苯乙烯对PBT/EPDM合金的阻燃改性

采用溴化聚苯乙烯阻燃剂对PBT/EPDM合金进行改性,研究了阻燃剂含量对PBT/EPDM合金力学、阻燃性能和热稳定性的影响.研究结果表明:随着阻燃剂含量的增加,PBT/EPDM合金的阻燃等级、极限氧指数均有显著提高.TGA曲线显示,随着阻燃剂的增加,起始失重温度和最大热失重速率温度均向高温移动,且最终的残留率均明显增多.同时,随着阻燃剂的增加,PBT/EPDM合金的拉伸强度呈先上升后下降趋势,合金的断裂伸长率和冲击强度呈下降趋势.

Flame Retardant of Brominated Polystyrene Resin in the PBT/EPDM Alloy

PBT was modified with the brominated polystyrene,and effects of contents of flame retardant on mechanical properties,flame-resistant properties and thermal stabilities of PBT/EPDM alloy were researched.The result showed that with the increasing of flame retardant,the flame retardant grades and the limiting oxygen index values of PBT/EPDM alloy were improved obviously.In the TGA cure,it could be seen that addition of flame retardant improved its initial weight loss temperature and maximum weight loss velocity temperature.The contents of residual carbon in the end were also increased.At the same time,the tensile strength was firstly improved,and then reduced,while the impact strength and elongation at break were reduced.