Synergistic Effects of Modified Hydrotalcite on Improving the Fire Resistance of Ethylene Vinyl Acetate Containing Intumescent Flame Retardants
Synergistic Effects of Modified Hydrotalcite on Improving the Fire Resistance of Ethylene Vinyl Acetate Containing Intumescent Flame Retardants
复制标题
改性水滑石对提高乙烯醋酸乙烯酯膨胀型阻燃剂阻燃性能的协同作用
DOI：
10.1002/pc.23964
复制
发表时间：
2018-02-01
影响因子：
5.2
通讯作者：
Gu, Xiaoyu
中科院分区：
文献类型：
--
作者：
Zhang, Sheng;Tang, Wufei;Gu, Xiaoyu
制备了NH 2SO 3 -1插层MgAl-LDH（SA-LDH），并将其与膨胀型阻燃剂（IFR）复合引入到乙烯-醋酸乙烯酯共聚物（伊娃）中，以提高复合材料的阻燃性能。采用红外光谱、X射线衍射、透射电镜和热重分析等方法对SA-LDH的结构和热稳定性进行了表征。通过极限氧指数（LOI）、垂直燃烧UL-94和锥形量热仪测试评价了伊娃复合材料的阻燃性能。当SA-LDH的质量分数为1%时，伊娃/IFR复合材料的氧指数从24.8提高到26.9，热释放速率（HRR）峰值显著降低。通过扫描电镜观察了燃烧后的半焦形貌，发现SA-LDH的存在有利于形成致密的半焦结构。SA-LDH和IFR对提高伊娃复合材料的阻燃性能具有协同作用。(C)2016年塑料工程师学会
The NH2SO3-1 intercalated MgAl-LDH (SA-LDH) was prepared and then introduced into ethylene vinyl acetate (EVA) in association with intumescent flame retardants (IFR) in order to improve the flame retardancy of the composite. The structure and thermal stability of SA-LDH was characterized by Fourier transform infrared, X-ray diffraction, transmission electron microscopy, and thermogravimetry analysis. The flame retardancy of EVA composite was evaluated by limiting oxygen index (LOI), vertical burning UL-94, and cone calorimeter tests. The presence of only 1 wt% SA-LDH could increase the LOI of EVA/IFR composite from 24.8 to 26.9, and significantly reduced the peak HRR value. The morphology of char after combustion was observed by scanning electron microscope, and it revealed that the presence of SA-LDH was beneficial to form compact char structure. It was proposed that there existed synergism between SA-LDH and IFR in improving the fire performance of EVA composite. (C) 2016 Society of Plastics Engineers