热重分析
共聚物
材料科学
极限氧指数
阻燃剂
聚苯乙烯
苯乙烯
高分子化学
丙烯酸酯
热稳定性
热分解
单体
量热法
傅里叶变换红外光谱
化学工程
燃烧
有机化学
化学
复合材料
聚合物
烧焦
工程类
物理
热力学
作者
Yu Sun,Yazhen Wang,Li Liu,Tianyuan Xiao
出处
期刊:Materials
[MDPI AG]
日期:2019-12-27
卷期号:13 (1): 127-127
被引量:10
摘要
A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.
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