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Characterization of impurities in new energetic materials

Charakterisierung von Verunreinigungen in neuen energetischen Materialien
: Bunte, G.; Pontius, H.; Kaiser, M.

Teipel, U. ; Fraunhofer-Institut für Chemische Technologie -ICT-, Pfinztal:
Energetic materials - production, processing and characterization
Pfinztal: ICT, 1998 (Proceedings of the International Annual Conference of ICT 29)
ISSN: 0722-4087
Fraunhofer-Institut für Chemische Technologie (Internationale Jahrestagung) <29, 1998, Karlsruhe>
Fraunhofer-Institut für Chemische Technologie (International Annual Conference) <29, 1998, Karlsruhe>
Fraunhofer ICT ()

Three samples of hexanitrohexaazaisowurtzitane (HNIW, CL 20)from different suppliers (.epsilon.-CL 20 from Thiokol, USA and .epsilon.- and .beta.- CL 20 from SNPE, France) were analyzed with chromatog. and spectroscopic techniques to characterize the chem. and polymorph purity of the materials to compare the different samples. IR-spectroscopic measurements showed that all 3 materials have polymorph purities >95 %. To get information about the chem. purity and possible byproducts or residual solvents the samples were analyzed by HPLC, NMR, and GC-MSD. Solid-Phase Micro Extn. (SPME) was applied for sample prepn. The chem. purity estd. by HPLC anal. was for all CL 20 samples >96 % while the .epsilon.-charge of SNPE had the highest purity (98.3%). From NMR-measurements a formyl-substituted byproduct was identified. From NMR as well as from GC-MSD analyses residual amts. of org. solvents were detected (ethanole or tetrahydrofurane). Furthermore different spare amts. of other org. components were identified after SPME-treatment and characterization with GC-MSD.