文献类型：期刊文献

英文题名：Effect of modified layered double hydroxide on the flammability of intumescent flame retardant PP nanocomposites

作者：Shen, Hui[1];Wu, Wei[1];Wang, Zhengyi[1];Wu, Wenzheng[1];Yuan, Yue[1];Feng, Yanling[1]

机构：[1]East China Univ Sci & Technol, Sino German Joint Res Ctr Adv Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：138

期号：40

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20212310449008);WOS:【SCI-EXPANDED(收录号:WOS:000656272400001)】；

语种：英文

外文关键词：composites; nanoparticles; nanowires and nanocrystals; synthesis and processing techniques; thermal properties; thermogravimetric analysis

摘要：The dodecyl sulfate intercalated CaMgAl-hydrotalcites (layered double hydroxides [LDHs]) were successfully prepared by co-precipitation method, and characterized by X-ray diffraction analysis, infrared spectroscopy (Fourier transform infrared spectra [FT-IR]), thermogravimetry (TG-DTA), scanning electron microscope, and Brunner-Emmet-Teller (BET). The prepared LDHs were added to the intumescent flame retardant (IFR) polypropylene (PP) nanocomposites, and the limiting oxygen index method (LOI), vertical combustion method (UL-94), cone calorimetry (CCT), and other test methods were used to study its thermal stability and combustion performance. The results showed that when the flame retardant was composed of 23 wt% IFR and 2 wt% O-SDS-LDHs, the LOI value of the material was increased to 31.5%, reaching the V-0 level, and the flame retardant performance was significantly improved. The results also showed that there was a significant synergistic effect between IFR and O-SDS-LDHs, which could improve the thermal stability and graphitization degree of PP nanocomposites. In addition, the peak heat release rate, total heat release, and total smoke production of the PP/IFR/O-SDS-LDHs system were 177 kW/m(2), 101 MJ/m(2), and 15.4 m(2), respectively, which were 82.2%, 51.0%, and 23.0% lower than those of pure PP, respectively. These improvements could be attributed to the presence of dense and continuous char layer formed by the synergistic effect.