Analysis of Products from Thermal Decomposition of Waste Computer Mainboard
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摘要: 采用热重分析仪-傅立叶变换红外光谱仪(TG-FTIR)、管式炉试验系统、气相色谱仪-质谱仪(GC-MS)等研究了电脑主板的热解特性和热处理产物.研究结果表明:废电脑主板热解过程剧烈失重阶段为300~460℃,该温度段约失重20%,加热至600℃后失重非常缓慢.废电脑主板热解产物中既有含8~15个C原子的苯酚等芳香族化合物,也有1~4个C原子的小分子有机化合物,且热解过程中还产生多种含溴有机物;这些热解产物来源于废电脑主板中有机聚合物和四溴双酚A的分解.Abstract: The pyrolysis characteristics and thermal decomposition products of waste computer mainboards were investigated by the TG-FTIR(thermogravimetric analyzer-Fourier transform infrared spectroscopy),a duct-furnace pyrolysis system and the GC-MS(gas chromatography-mass spectrometer).The results show that waste computer mainboards have an acute mass loss from 300 to 460℃ and about 20% of mass is lost at this stage,and the loss velocity over 600℃ is very slow.The thermal decomposition products of a waste computer mainboard include aromatic compounds comprised of 8 to 15 carbon atoms such as phenol,organic compounds with 1 to 4 carbon atoms and bromized organic compounds.These products mainly come from the decomposition of the organic polymer and tetrabromobisphenol A in waste computer mainboards.
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Key words:
- waste computer /
- mainboard /
- brominated flame retardant /
- pyrolysis
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HAMERS T,KAMSTRA J H,SONNEVELD E,et al.In vitro profiling of the endocrine disrupting potency of bmminated flame retardants[J].Toxicological Science,2006,92(1):157-173.[2] CANESI L,LORUSSO L C,CIAECI C,et al.Effects of the brominated flame retardant tetrabromobisphenol-A (TBBPA) on cell signaling and function of mytilus hemocytes involvement of MAP kinases and protein kinase[J].Aquat Tuxicol,2005,75(3):277-287.[3] BARONTINI F,MARSANICH K,PETARCA L,et al.Thermal degradation and decomposition products of electronic boards containing BFRs[J].Industrial and Engineering Chemistry Research,2005,22(12):4186-4199.[4] LUDA M P,BALABANOVICH A I,CAMINO G.Thermal decomposition of fire retardant brominated epoxy resins[J].Journal of Analytical and Applied Pyrolysis,2002,65(1):25-40.[5] FEDERICA B,VALEIRO C.Formation of hydrogen bromide and organo-bromineted compounds in the thermal degradation of electronic boards[J].Journal of Analytical and Applied Pyrolysis,2006,77(1):41-55.[6] BALABANOVICH A I,HORNUNG A,MERZ D.The effect of a curing agent on the thermal degradation of fire retardant brominated epoxy resins[J].Polymer Degradation and Satabiligy,2004,12(2):713-723.[7] 彭绍洪,陈烈强,甘舸,等.废旧电路板真空热解[J].化工学报,2006,57(11):2720-2726.PENG Shaohong,CHEN Lieqiang,GAN Ge,et al.Vacuum pyrolysis of waste printed circuit boards[J].Journal of Chemical Industry and Engineering,2006,57 (11):2720-2726.[8] LAI Yichieh,LEE Wenjhy,LI Hsingwang,et al.Inhibition of polybrominated dibenzo-p-dioxin and dibenzofuran formation from the pyrolysis of printed circuit boards[J].Environmental Science,2007,41 (2):957-962.
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