Regulating Effect of Exfoliated Clay on Intumescent Char Structure and Flame Retardancy of Polypropylene Composites
Regulating Effect of Exfoliated Clay on Intumescent Char Structure and Flame Retardancy of Polypropylene Composites
复制标题
剥落粘土对聚丙烯复合材料膨胀炭结构及阻燃性能的调节作用
DOI：
10.1021/acs.iecr.6b00480
复制
发表时间：
2016-05-25
影响因子：
4.2
通讯作者：
Li, Juan
中科院分区：
文献类型：
--
作者：
Hu, Yapeng;Wang, Xiangmei;Li, Juan
通过在蒙脱土片层中引入镍离子和三聚氰胺甲醛，制备了剥离型蒙脱土（E-MMT）。采用改性蒙脱土（E-MMT）对聚丙烯（PP）/膨胀型阻燃剂（IFR）复合材料的阻燃性能进行了调节。所使用的IFR由聚磷酸铵（APP）和成炭剂1，3，5-三嗪-2，4，6-三吗啉基（TTM）组成。结果表明，E-MMT对PP/IFR复合材料具有良好的协同阻燃作用。当IFR含量为16wt%、E-MMT含量为3wt%时，PP复合材料通过了UL 94 V-0级测试。此外，E-MMT不仅改善了IFR和PP/IFR共混物的残炭，而且改变了残炭的微观形态，使PP/IFR共混物的表面致密残炭转变为微孔残炭。这种微孔炭对PP与外界的热、质隔离效果很好，因而具有较好的阻燃性能。
An exfoliated montmorillonite (E-MMT) was prepared by introducing Ni2+ and melamine formaldehyde into layers of MMT. The E-MMT was applied to regulate the flame retardant properties of polypropylene (PP)/intumescent flame retardant (IFR) composites. The IFR used consists of ammonium polyphosphate (APP) and a charring agent, 1,3,5-triazine-2,4,6-trimorpholinyl (TTM). The results revealed that the E-MMT has good synergistic effect on flame retardancy of PP/IFR composites. The PP composites with 16 wt % IFR and 3 wt % E-MMT can pass the UL94 V-0 test. Moreover, the E-MMT not only improves the char residues of IFR and PP/IFR blend but also changes the micromorphology of char, turning the compact surface char produced by PP/IFR into microporous char. This microporous char is so good for isolating heat and mass between PP and the outside that a better flame retardant property is obtained.