The high efficiency two stage intumescent-contractive flame retardant on ABS
The high efficiency two stage intumescent-contractive flame retardant on ABS
复制标题
DOI：
10.1016/j.polymdegradstab.2012.09.013
复制
发表时间：
2013
影响因子：
5.9
通讯作者：
Haiqing Yin;Dan-dan Yuan;Xufu Cai
中科院分区：
文献类型：
--
作者：
Haiqing Yin;Dan-dan Yuan;Xufu Cai
以聚对苯二甲酸乙酯（PETA）或聚对苯二甲酸乙酯（PPTA）与聚磷酸铵（APP）为原料制备了一段无卤阻燃剂，当负荷量在30%及以上时，体系对丙烯腈-丁二烯-苯乙烯（ABS）树脂具有良好的阻燃性，但一旦质量分数降低，体系的阻燃性就不能保持原有的阻燃性。为了提高这类阻燃剂的效率，我们将PETA与PPTA混合，并引入红磷作为第二酸源。该体系有膨胀和收缩两种炭化过程。通过极限氧指数（LOI）、UL-94垂直燃烧和热重分析（TGA）测试研究了IFR-ABS复合材料的可燃性和热稳定性。结果表明，当APP、PETA、PPTA和红磷的质量分数分别为12%、4%、1.33%和2.66%时，阻燃ABS的LOI为27，UL-94垂直燃烧试验达到V-0。TGA曲线表明两者之间存在明显的合作关系。利用红外光谱（FTIR）和扫描电镜（SEM）研究了炭化的结构和机理。
One stage halogen-free flame retardant was prepared by poly(p-ethylene terephthalamide) (PETA) or poly(para-phenylene terephthanlamide) (PPTA) and ammonium polyphosphate (APP), the system had a good flame retardancy on acrylonitrile-butadiene-styrene (ABS) resin when loading was 30% or more, but once mass fraction decreased, the system did not maintain previous flame retardancy. To improve the efficiency of this kind of flame retardant, we mixed PETA with PPTA and introduced red phosphorus to play as the second acid source. This system had two charring process—swell and shrink. The flammability and thermal stability of IFR-ABS composites were investigated by limiting oxygen index (LOI), UL-94 vertical burning and thermo gravimetric analysis (TGA) test. Results showed that this IFR system had both good flame retardant and anti-dripping abilities for ABS, when the mass fractions of APP, PETA, PPTA and red phosphorus were only 12%, 4%, 1.33% and 2.66% respectively, the LOI of flame retardant ABS was 27 and UL-94 vertical burning test reached V-0. The TGA curves suggested that there was a distinct cooperation. Additionally, the structure and the mechanism of charring were studied by FTIR and SEM.