印刷线路板热解过程中溴的迁移实验研究
Experimental study on bromine conversion during pyrolysis of printed circuit boards
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摘要: 选取溴化环氧树脂印刷线路板为原料,通过热重红外联用仪和热解-气相色谱/质谱联用仪对其热解过程中溴的迁移规律进行了研究。结果表明,印刷线路板主要热解温度区间在300~380℃,HBr在最大热失重处释放;PCB热解时,含溴化合物主要有溴甲烷、溴苯酚及2-溴, 4-异丙基甲苯。Abstract: The thermal decomposition of a kind of brominated epoxy resin printed circuit boards (PCB) was investigated by TG-FTIR and Py-GC/MS analysis to study the bromine conversion. Results showed that the main pyrolysis temperature zone of PCB was 300~380℃, HBr was mainly released at the mean time. The brominated compounds were mainly bromomethane, bromophenol and 2-Bromo-4-isopropyl-1-methylbenzene.
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Key words:
- printed circuit boards /
- pyrolysis /
- bromine
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