文献类型：期刊文献

中文题名：ZDP/纳米Al2O3阻燃改性PET挤出发泡材料的研制

英文题名：Development of ZDP/nano-Al2O3 Flame Retardant Modified PET Extrusion Foaming Material

作者：高亮[1];葛宇凯[1];许志美[1];刘涛[1];赵玲[1,2]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237;[2]新疆大学化学化工学院,乌鲁木齐830046

年份：2019

卷号：47

期号：7

起止页码：14

中文期刊名：工程塑料应用

外文期刊名：Engineering Plastics Application

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

语种：中文

中文关键词：聚对苯二甲酸乙二酯;二乙基次磷酸锌;纳米三氧化二铝;协效阻燃;挤出发泡

外文关键词：poly(ethylene terephthalate);zinc diethylphosphinate;nano-Al2O3;synergistic flame retardancy;extrusion foaming

摘要：以二乙基次磷酸锌(ZDP)为阻燃剂,nano-Al2O3为协效剂,采用共混法制备阻燃聚对苯二甲酸乙二酯(PET),并通过超临界CO2进行挤出发泡制备阻燃PET发泡材料。使用极限氧指数(LOI)、热重分析和剪切流变行为表征材料阻燃性能与可发泡性,并通过扫描电子显微镜观测发泡材料的结构形貌与燃烧炭层形貌。结果表明,当ZDP质量分数为7.5%,nano-Al2O3质量分数为1%时,PET材料LOI值提高到28.6%,挤出发泡后的LOI值为27.9%,发泡倍率达到4.23倍,平均泡孔直径为106μm,泡孔密度为6.23×10^6个/cm^3。nano-Al2O3与ZDP具有明显的协效作用,nano-Al2O3的加入显著改变了体系的热降解行为,残炭率明显提高。流变结果显示加入质量分数为7.5%的ZDP和1%的nano-Al2O3后,阻燃PET损耗因子在流变场的低频区接近于1,且低于纯PET,挤出发泡结果也表明该材料具有熔融可发泡性,且燃烧后的炭层形貌比较致密稳定。
Flame retardant poly(ethylene terephthalate)(PET)was modified by blending method with zinc diethylphosphite(ZDP)as flame retardant and nano-Al2O3 as synergistic agent,and flame retardant PET foaming materials were prepared by extrusion foaming with supercritical CO2.The limiting oxygen index(LOI),thermosgravimetric analysis and shear rheological behavior were investigated to characterize flame retardant properties and foaming ability and scanning electron microscopy was used to observe the morphology of the foamed cells and the burning carbon layer.The results show that when the mass fraction of flame retardant ZDP is 7.5% and nano-Al2O3 is 1%,the LOI value of the PET sample increases to 28.6%,after extrusion foaming,the LOI value is 27.9%,expansion ratio reaches 4.23 times,average pore diameter is 106μm and pore density is 6.23×10^6 cell/cm^3.Nano-Al2O3 and ZDP have obvious synergistic effect,the addition of nano-Al2O3 changes the thermal degradation behavior of the system,and increases the carbon residue rate obviously.The rheological analysis shows that the loss factor of the system is close to 1 in the low frequency region of the rheological field and lower than pure PET after adding 7.5% ZDP and 1% nano-Al2O3.The extrusion foaming results also show that the system has melting foamability,and the morphology of the burned carbon layer is compact and stable.