复合阻燃体系在阻燃聚碳酸酯/聚对苯二甲酸丁二醇酯合金中的应用机理  

Application Mechanism of Composite Flame Retardant System in Polycarbonate/Polybutylene Terephthalate Alloy

作　　者：周健[1] 吴承旭[1] 王国军[1] 李磊[1] 董观秀[1] 杨润苗[1] 

机构地区：[1]江苏技术师范学院材料工程学院,江苏常州213001

出　　处：《高分子材料科学与工程》2012年第12期106-109,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(40973046)

摘　　要：采用磷酸酯(PX-220)作为阻燃剂,聚四氟乙烯(PTFE)、硼酸锌(ZB)作为阻燃协同剂,聚碳酸酯(PC)和聚对苯二甲酸丁二醇酯(PBT)为基体,通过熔融挤出混合,获得阻燃PC/PBT合金。研究了磷酸酯/PTFE和磷酸酯/ZB复合阻燃剂对PC/PBT合金阻燃性能、热分解行为的影响,分析了磷酸酯、PTFE和ZB在阻燃PC/PBT合金中的阻燃机理,采用扫描电镜(SEM)观察阻燃PC/PBT合金的燃烧物表面形态。研究结果表明,磷酸酯/PTFE和磷酸酯/ZB复合阻燃剂在PC/PBT合金中具有优良的阻燃协同作用,使该阻燃材料的氧指数达到30以上;垂直燃烧达到V-0级。TG曲线表明,磷酸酯的加入提高了PC/PBT合金的热分解温度,延缓了PC/PBT合金燃烧速度。合金材料燃烧炭层形貌扫描电镜(SEM)说明,复合阻燃剂能增加炭层密度,提高阻燃效果。The flame-retardant polycarbonate （PC）/polybutylene terephthalate （PBT） alloy were prepared through melting and extruding method using phosphate （PX-220） as flame retardant, polytetrafluoroethylene （PTFE） and zinc borate（ZB） as cooperating flame retardant, PCand PBT as the matrix. The influence of composite flame-retardant phosphate/ZB and phosphate/PTFE on flame-retardant property and thermal decomposition of flame- retardant PC/PBT alloy were studied, The combustible surface feature of flame-retardant PC/PBT alloy was observed by scanning electron microscope （SEM）. The results show that composite flame retardant phosphate/PTFE and phosphate / ZB have the excellent flame-retardant cooperating effect, the oxygen index of PC/PBT alloy exceeds 30% and perpendicular burning property achieves V-0 level. TG curves indicate that the thermal decomposition temperature of PC/PBT alloy increases and burning velocity of PC/PBT alloy is delayed after the addition of phosphate. The thickness of the char layer complex increases with the addition of the composite flame retardant.

关 键 词：阻燃机理 复合阻燃剂 协同效应 热分解 

分 类 号：TQ314.248[化学工程—高聚物工业]