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http://dx.doi.org/10.5806/AST.2017.30.5.234

Thermal residues analysis of plastics by FT-near infrared spectroscopy  

Lee, So Yun (National Fire Service Academy, Fire Research Laboratory)
Cho, Won Bo (Department of Pharmacy, Dongduk Women's University)
Kim, Hyo Jin (Department of Pharmacy, Dongduk Women's University)
Publication Information
Analytical Science and Technology / v.30, no.5, 2017 , pp. 234-239 More about this Journal
Abstract
Identifying the components of residues that are not completely burned at the sites of fires site can provide valuable information for tracing the causes of fires. In order to clarify the types of plastic combustion residues found at the scenes of fires, we studied the residue formed after the combustion of polyethylene (PE) and acrylonitrile butadiene styrene (ABS). Plastic samples were burned at 200, 300, 350, 400, and $500^{\circ}C$ for 3 min using a cone calorimeter, and the changes in weight and combustion products were observed. The powder products obtained by lyophilization and pulverization of the combustion products obtained at each temperature were analyzed by a Fourier transform-near infrared (FT-NIR) spectrometer. When the PE samples were burned, the weight did not change up to $350^{\circ}C$, however a significant change in the weight could be measured above $400^{\circ}C$. The principal component analysis (PCA) of the FT-NIR spectra of the PE and ABS samples obtained at each temperature confirmed that the combustion residues at each temperature were PE and ABS, respectively. Therefore, the types of unburned plastics found at the sites of fires can be confirmed rapidly by near infrared spectroscopy.
Keywords
Plastic; Fire residues; Cone calorimeter; Near infrared spectrometer (NIRS); Principle component analysis (PCA);
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