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Characterization of Plastic Bonded Explosives by Pyrolysis-Gas Chromatography and Multivariate Data Analysis, Development of the Procedure (Karakterisering van kunststof gebonden explosieven met pyrolyse-gaschromatografie en multivariate data analyse. Ontwikkeling van de procedure).
PRINS MAURITS LABORATORIUM TNO RIJSWIJK (NETHERLANDS)
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A further development of the procedure based on pyrolysis-gas chromatography Py-GC for the characterization of plastic bonded explosives PBXs is described. After grinding, the PBX samples were pressed on a pyrolysis wire followed by Py-GC analysis. The peak areas obtained were normalized and submitted to multivariate data analysis. The use of principal component analysis PCA was tested on 5 samples which differed slightly in composition and age. The results were promising and showed that PCA is a powerful tool for the differentiation between PBX samples. The pressure by which the samples were pressed on the pyrolysis wire appeared to be an important parameter. This parameter was optimized together with the pyrolysis temperature and the amount of sample. The optimization experiment was carried out with 2 PBX samples which differed only in crosslink density. It turned out that it was difficult to find optima in the parameters resulting in a maximal difference between the 2 samples. The following settings of the parameters were selected 5.2 tonnes, 75 mg and 610 C.
APPROVED FOR PUBLIC RELEASE