{"id":1127,"date":"2016-06-21T13:19:32","date_gmt":"2016-06-21T16:19:32","guid":{"rendered":"https:\/\/www.nachodelatorre.com.ar\/mosconi\/?p=1127"},"modified":"2016-06-21T13:19:32","modified_gmt":"2016-06-21T16:19:32","slug":"un-estudio-de-las-propiedades-de-detonacion-impulso-sensibilidad-al-impacto-y-sintesis-de-anta-nitrada-y-derivados-de-nto","status":"publish","type":"post","link":"https:\/\/www.fie.undef.edu.ar\/ceptm\/?p=1127","title":{"rendered":"Un estudio de las propiedades de detonaci\u00f3n, impulso, sensibilidad al impacto y s\u00edntesis de ANTA nitrada y derivados de NTO"},"content":{"rendered":"

Los derivados nitrados del 5-amino- 3-nitro- 1,2,4-triazol (ANTA) y del 3-nitro- 1,2,4-triazol- 5-ona (NTO) han sido te\u00f3ricamente caracterizados con respecto a su desempe\u00f1o como explosivos y propulsantes. La velocidad y presi\u00f3n de detonaci\u00f3n de los derivados, calculadas con el software EXPLO5, estaban al mismo nivel o ligeramente por encima del rendimiento del 1,3,5- trinitroperhidro-1,3,5- triazina (RDX). Los resultados mostraron que composiciones de 1,3,4-trinitro- 1,2,4-triazol- 5-ona y GAP pueden dar impulsos espec\u00edficos por encima de 2600 m\/s en propulsores de cohete.<\/p>\n

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463<\/div>\n
A Study of the Detonation Properties, Propellant Impulses, Impact Sensitivities…<\/div>\n
5-nitrimino-3-nitro-1,2,4-triazole, 1,3-dinitro-1,2,4-triazol-5-one and 3,4-dinitro-<\/div>\n
1,2,4-triazol-5-one were suggested. When NTO was dissolved in a<\/div>\n
mixture of<\/div>\n
nitric acid and acetic anhydride the compound decomposed. NTO did not seem<\/div>\n
to decompose if chloride-assisted nitration was used and the temperature was<\/div>\n
kept below 15<\/div>\n
\u00b0<\/div>\n
C. The FTIR spectrum of a<\/div>\n
derivative obtained indicated that<\/div>\n
an N\u2212NO<\/div>\n
2<\/div>\n
bond had been formed in the molecule. However, the derivative was<\/div>\n
not stable for more than 24<\/div>\n
h at room temperature.<\/div>\n
5<\/div>\n
Experimental Section<\/div>\n
NTO was used as received from Chemring Nobel. Sigma-Aldrich supplied<\/div>\n
acetic anhydride and concentrated nitric acid. The FTIR spectra were recorded<\/div>\n
on a<\/div>\n
Nicolet FTIR (iS10) with diamond ATR. The absorbance bands were<\/div>\n
characterized as broad (b), strong (s), medium (m) and weak (w).<\/div>\n
5.1<\/div>\n
Nitration of NTO in the presence of zinc chloride<\/div>\n
Acetic anhydride (1.86<\/div>\n
g) was added dropwise to nitric acid (0.69<\/div>\n
g) at 0<\/div>\n
\u00b0<\/div>\n
C.<\/div>\n
The solution was stirred for 30<\/div>\n
min before zinc chloride (0.15<\/div>\n
g) was dissolved<\/div>\n
in the mixture. After stirring for 30 min, small portions of NTO (0.30<\/div>\n
g) were<\/div>\n
added. This mixture was stirred for 1<\/div>\n
h, heated to 15-18<\/div>\n
\u00b0<\/div>\n
C and stirred overnight.<\/div>\n
Finally, it was heated to 40<\/div>\n
\u00b0<\/div>\n
C and stirred for 2<\/div>\n
h. During the reaction the<\/div>\n
colour of the slurry-like mixture changed from yellow to weak-red and then to<\/div>\n
white. The slurry was poured into a<\/div>\n
beaker containing ice-cold water and the<\/div>\n
precipitate was filtered off and washed with water. The precipitate dissolved<\/div>\n
rapidly and decomposed during the washing step. The procedure was repeated<\/div>\n
using chloroform instead of water. The precipitate was more stable in this solvent<\/div>\n
and was therefore filtered off and dried under vacuum.<\/div>\n
IR (ATR):<\/div>\n
\u1fe6<\/div>\n
= 3363 (b),<\/div>\n
2215 (w), 1542 (s), 1455(s), 1408 (s), 1301(s), 1028 (m), 957 (w), 809 (w) cm<\/div>\n
\u22121<\/div>\n
.<\/div>\n
Acetic anhydride (1.57<\/div>\n
g) was added dropwise to nitric acid (0.57 g) at<\/div>\n
0<\/div>\n
\u00b0<\/div>\n
C. After 30<\/div>\n
min stirring, zinc chloride (0.27<\/div>\n
g) was dissolved in the mixture,<\/div>\n
followed by stirring for 30<\/div>\n
min. After addition of NTO (0.59<\/div>\n
g) in small portions,<\/div>\n
the mixture was stirred for 1<\/div>\n
h, then heated to 15<\/div>\n
\u00b0<\/div>\n
C and stirred overnight.<\/div>\n
Thereafter, the white slurry was poured into cold chloroform and filtered off.<\/div>\n
The precipitate was dried under vacuum, washed with acetone, filtered and dried.<\/div>\n
FTIR (ATR):<\/div>\n
\u1fe6<\/div>\n
= 3207 (b), 1717 (m), 1639 (w), 1546 (s), 1456 (m), 1411 (m),<\/div>\n
1369 (m), 1290 (s), 1108 (w), 1022 (m), 977 (m), 861 (w) cm<\/div>\n
\u22121<\/div>\n
.<\/div>\n
Nitric acid (0.36<\/div>\n
g) was cooled to 0<\/div>\n
\u00b0<\/div>\n
C and acetic anhydride (2.06<\/div>\n
g) was<\/div>\n
then added dropwise. The mixture was stirred for 20<\/div>\n
min before zinc chloride<\/div>\n
<\/div>\n
464<\/div>\n
T.L. Jensen, J.F. Moxnes, E.F. Kj\u00f8nstad, E. Unneberg<\/div>\n
(0.20<\/div>\n
g) was added followed by stirring for 30<\/div>\n
min at 0<\/div>\n
\u00b0<\/div>\n
C. Subsequently, small<\/div>\n
portions of NTO (0.38<\/div>\n
g) were added and the mixture was stirred for 5<\/div>\n
h at 0-5<\/div>\n
\u00b0<\/div>\n
C,<\/div>\n
poured into cold chloroform (5.0<\/div>\n
g), filtered off, washed with chloroform (10.0<\/div>\n
g)<\/div>\n
and dried under vacuum. The product consisted of small white crystals. FTIR<\/div>\n
(ATR):<\/div>\n
\u1fe6<\/div>\n
= 3257 (b), 1716 (s), 1634 (w), 1545 (s), 1463 (w), 1412 (w), 1369 (m),<\/div>\n
1305 (s), 1282 (s), 1199 (m), 1128 (w), 1003 (m), 978 (m) cm<\/div>\n
\u22121<\/div>\n
.<\/div>\n
5.2<\/div>\n
Nitration of NTO in the presence of ammonium chloride<\/div>\n
Acetic anhydride was dripped into nitric acid at 0<\/div>\n
\u00b0<\/div>\n
C. After stirring for 30<\/div>\n
min,<\/div>\n
ammonium chloride was added. The mixture was stirred for 30<\/div>\n
min before the<\/div>\n
addition of small portions of NTO, followed by stirring for 1<\/div>\n
h. The mixture<\/div>\n
was then heated, first to room temperature and stirred for 4<\/div>\n
h, then to 35-40<\/div>\n
\u00b0<\/div>\n
C<\/div>\n
and stirred for 1<\/div>\n
h. The white slurry was poured onto crushed ice, filtered off<\/div>\n
and dried. FTIR (ATR):<\/div>\n
\u1fe6<\/div>\n
= 3194 (m), 1690 (s), 1539 (m), 1471 (m), 1338 (s),<\/div>\n
1279 (m), 1186 (m), 1108 (w), 1005 (m) cm<\/div>\n
\u22121<\/div>\n
.<\/div>\n
FTIR spectrum of NTO (ATR):<\/div>\n
\u1fe6<\/div>\n
= 3194 (m), 1690 (s), 1541 (m), 1471 (m),<\/div>\n
1338 (s), 1280 (m), 1187 (m), 1109 (w), 1006 (m) cm<\/div>\n
\u22121<\/div>\n
<\/div>\n

Fuente:<\/strong> http:\/\/www.wydawnictwa.ipo.waw.pl<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Los derivados nitrados del 5-amino- 3-nitro- 1,2,4-triazol (ANTA) y del 3-nitro- 1,2,4-triazol- 5-ona (NTO) han sido te\u00f3ricamente caracterizados con respecto a su desempe\u00f1o como explosivos… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[29,24],"tags":[],"_links":{"self":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/1127"}],"collection":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1127"}],"version-history":[{"count":0,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/1127\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}