Preparation and Characterization of Desensitized ?-HNIW in Solvent-Antisolvent Recrystallizations

• Autorzy: Jiang X. , Guo X. , Ren H. , Jiao Q.
• Języki publikacji: PL

Abstrakty

EN

The solubility of hexanitrohexaazaisowurtzitane (HNIW) in solvent and solvent-antisolvent mixtures, and the temperature at which the HNIW's polymorph transforms were studied. The solubility of HNIW in solvent-antisolvent mixtures was measured at 30 C and these data were fitted to a generalized solubility curve. Recrystallization experiments were conducted at 30 C in the case of saturation with the volume ratio of ethyl acetate to petroleum ether (chloroform) ranging from 0:1 to 4:1. Desensitized HNIW was obtained by ethyl acetate and petroleum ether crystallization and characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), High Performance Liquid Chromatography (HPLC) and Scanning Electron Microscopy (SEM). The FTIR and XRD spectra confirmed the structural features of ε-HNIW. The blocklike ε-HNIW grains had an average particle size of 160 ?m and high purity (98.52%). The decomposition of ε-HNIW was observed in the temperature range of 225-246 C by Differential Scanning Calorimetry (DSC). Furthermore, the impact and friction sensitivity tests suggested that the desensitized ε-HNIW was less sensitive than raw HNIW. Small scale gap tests with desensitized ε-HNIW showed that these crystals are less sensitive to shock initiation.

Słowa kluczowe

EN

ε -HNIW; supersaturation; crystal morphology; thermal decomposition; reduced sensitivity

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2012
• Tom: Vol. 9, nr 3
• Strony: 219--236
• Opis fizyczny: Bibliogr. 26 poz., fig.

Twórcy

autor

Jiang X.

autor

Guo X.

autor

Ren H.

autor

Jiao Q.

• State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China,

Bibliografia

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