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.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
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)
关键词
阻燃机理
复合阻燃剂
协同效应
热分解
flame-retardant mechanism
composite flame retardant
cooperating effect
thermal decomposition
