Co-agglomerated crystals of 2,2 ',4,4 ',6,6 '-hexanitro-stilbene/-azobenzene with attractive nitramines

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F23%3A39920212" target="_blank" >RIV/00216275:25310/23:39920212 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1385894722066815?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1385894722066815?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2022.141200" target="_blank" >10.1016/j.cej.2022.141200</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Co-agglomerated crystals of 2,2 ',4,4 ',6,6 '-hexanitro-stilbene/-azobenzene with attractive nitramines

Popis výsledku v původním jazyce

Co-agglomerated crystals (CACs) of trans-2,2,4,4 &apos;,6,6 &apos;-hexanitrostilbene (HNS) and trans-2,2 &apos;,4,4 &apos;,6,6 &apos;-hexani-troazobenzene (HNAB) with RDX, fl-HMX, BCHMX and epsilon-CL-20 have been prepared. Powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), Raman studies and differential thermal analysis (DTA) have confirmed that this process leads to the formation of co-crystals (CCs), in which HMX is present in its delta-form, CL-20 in its fl-form and trans-HNS changes its conformation to cis-form. In most cases, these significant structural changes and intermolecular-orientations have improved the impact sensitivities, mainly in some CACs with cis-HNS; for CL-20, on the other hand, the insertion of HNS or HNAB into its crystal lattice is destabilizing. Logical relationships between some FTIR, Raman vibrational modes of the CACs studied and parameters of their initiation and detonation have shown greater information about corresponding molecular structural relation-ships. The detonation energies of these co-crystals are in most of cases higher than that of correspond to the percentage of the coformers in them. It has been shown that this co-agglomeration can reduce the sensitivity of nitramines (with the exception of CL-20) roughly to the level of the sensitivity of analogous plastic-bonded explosives (PBXs), with the high-performance parameters of the resulting CACs being maintained. From a practical point of view, the combination of HMX and HNS appears to be the most optimal; these CACs at a molar ratio of 1.00/0.11 have exhibited the impact sensitivity of 47 J and the calculated detonation velocity 8.98 km. s-1.

Název v anglickém jazyce

Co-agglomerated crystals of 2,2 ',4,4 ',6,6 '-hexanitro-stilbene/-azobenzene with attractive nitramines

Popis výsledku anglicky

Co-agglomerated crystals (CACs) of trans-2,2,4,4 &apos;,6,6 &apos;-hexanitrostilbene (HNS) and trans-2,2 &apos;,4,4 &apos;,6,6 &apos;-hexani-troazobenzene (HNAB) with RDX, fl-HMX, BCHMX and epsilon-CL-20 have been prepared. Powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), Raman studies and differential thermal analysis (DTA) have confirmed that this process leads to the formation of co-crystals (CCs), in which HMX is present in its delta-form, CL-20 in its fl-form and trans-HNS changes its conformation to cis-form. In most cases, these significant structural changes and intermolecular-orientations have improved the impact sensitivities, mainly in some CACs with cis-HNS; for CL-20, on the other hand, the insertion of HNS or HNAB into its crystal lattice is destabilizing. Logical relationships between some FTIR, Raman vibrational modes of the CACs studied and parameters of their initiation and detonation have shown greater information about corresponding molecular structural relation-ships. The detonation energies of these co-crystals are in most of cases higher than that of correspond to the percentage of the coformers in them. It has been shown that this co-agglomeration can reduce the sensitivity of nitramines (with the exception of CL-20) roughly to the level of the sensitivity of analogous plastic-bonded explosives (PBXs), with the high-performance parameters of the resulting CACs being maintained. From a practical point of view, the combination of HMX and HNS appears to be the most optimal; these CACs at a molar ratio of 1.00/0.11 have exhibited the impact sensitivity of 47 J and the calculated detonation velocity 8.98 km. s-1.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

1873-3212

Svazek periodika

457

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

18

Strana od-do

141200

Kód UT WoS článku

000925238800001

EID výsledku v databázi Scopus

2-s2.0-85146095099