废电脑主板热解产物分析

Analysis of Products from Thermal Decomposition of Waste Computer Mainboard

采用热再分析仪-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，且热解过程巾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．

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 mainhoards.