期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 134, 期 1, 页码 -出版社
WILEY
DOI: 10.1002/app.44356
关键词
flame retardance; foams; polystyrene
资金
- National Natural Science Foundation of China [51573117]
- Science and Technology Support Program of Sichuan Province [2015GZ0067]
- State Key Laboratory of Polymer Materials Engineering [sklpme2016-3-01]
Expandable polystyrene (EPS) foam is largely used as the thermally insulating external wall in buildings and constructions, but it is extremely flammable because of the presence of almost 98% air into its porous structure, its high surface-area-to-mass ratio, and its elemental composition. Lots of serious fire disasters caused by EPS foam have posed great threats to people's properties and lives in recent years. Thus, a halogen-free, flame-retardant EPS is urgently needed, and its preparation is still a global challenge. To solve the problem that it is easy for EPS foam to form melt dripping and difficult for it to generate a char layer during the combustion process, a macromolecular nitrogen-phosphorus intumescent flame retardant (MNP) was selected to prepare flame-retardant EPS foam and good mechanical and flame-retardant properties were obtained. The scanning electron microscopy characterization revealed that MNP could penetrate into the gap between the beads, and a thin physical coating layer formed on the surface of the bead. The data from the thermogravimetry-Fourier transform infrared test indicated that a nitrogenous noncombustible gas was generated by the pyrolysis of MNP. When the MNP content increased to 30%, the limiting oxygen index and the smoking density rate of the EPS-MNP foam were 28.8 and 23.6, respectively, and a UL94V-0 classification was achieved. In addition, the heat-release rate, total heat-release, smoke produce rate, and carbon dioxide production of the EPS-MNP foams all decreased obviously; this was attributed to the flame-retardant effects of MNP in both the condensed and gas phases. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44356.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据