One way to reduce sensitivity and also to add special properties to explosives is to perform coating that depends on either the coating agent type or the usage process. In this work, the insensitive composite of penta erythritol tetra nitrate (PETN) was prepared with carbon black (CB) and Triton X-114 (TX114) by a solvent/non-solvent method. Taguchi experimental design (orthogonal array, L9) with using the impact sensitivity (H50) as a response was applied for the process optimization. Effects of the CB mass fraction, solvent flowrate, surfactant type and surfactant concentration were evaluated and the results were quantified by the analysis of variance (ANOVA). The ANOVA analysis predicted that the best H50 was 67.4 ± 1.5 cm for the optimum synthesis conditions of 5.0 wt% CB, 1 mL min-1 flowrate, and TX114 as a surfactant at a concentration of 2.010-3 mol L-1. The experimentally determined value of H50 was 68.0 ± 0.5 cm, which is in good agreement with the predicted value. Finally, thermal analysis and vacuum stability test were applied to the synthesized composite indicating that CB and TX114 are thermally adaptable and chemically compatible with PETN.
One way to reduce sensitivity and also adding special properties to explosives is a coating that depends on either the coating agent type or the usage process. In this work, an insensitive nanocomposite of PETN was prepared with multi-wall carbon nanotube (MWCNT) and Triton X-114 (TX114) by the solvent/nonsolvent method. Taguchi experimental design (orthogonal array, L 9 ) using impact sensitivity (H 50 ) investigation was applied to the process optimization. The variable effects of MWCNT mass fraction, solvent (acetone) flow rate, surfactant type and surfactant concentration were evaluated and then the re-sults were quantified by the analysis of Variance (ANOVA). ANOVA data predicted the best H 50 was 84.03 � 3.43 cm that was obtained for the optimum conditions of 5.0 wt% MWCNT, 1 mL min À 1 flow rate, TX114 as surfactant with a concentration of 1.0 × 10 À 3 mol Lit À 1 . Practical results of H 50 were obtained 84.0 � 0.5 cm that were in agreement with the predicted H 50 . Finally, thermal analysis and vacuum stability test were applied to the synthesized nanocomposite and the obtained results indicate MWCNT and TX114 are thermal adaptable and chemically compatible with PETN.Keywords: Desensitized PETN · Taguchi design · Impact sensitivity · Thermal analysis · Multi-wall carbon nanotube [a] M.Figure 7. DSC curves with Kissinger plots of PETN (a1-2) and the sensitized nanocomposite (b1-2).
Coating and Thermal Kinetic Studies of PETN ParticlesPropellants Explos. Pyrotech. 2019,
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