Verwendung von 5-Phenyl-cyclohexan-l,3-dion-4-carboxanilid ids Stabilisator fur Doublebase-Treibstoffe 5-Phenyl-cyclohexan-1,3-dion-4-carboxanid wird als Stabilisator fiir Doublebase-Treibstoffe eingesetzt und zeigt gute Ergebnisse bei den Stabilitatsuntersuchungen. Die Proben wurden 12 Tage lang bei 100 "C gelagert und mit geeigneten Lijsungsmitteln extrahiert. Die Verteilungschromatographie wurde zur Trennung der verschiedenen Nitroderivate des 1,3-Diketon-Stabilisators herangezogen. Utilisation du 5-ph~nyl-cyclohexane-1,3-dione-4-earboxanilide comme stabilisant d a m les propergols B double base Le 5-phtnyl-cyclohexane-1,3-dione-4-carboxanilide est utilisC comme stabilisant dans les propergols h double base et donne de bons resultats. Les Cchantillons ont Ct C stockes pendant 12 jours h 100°C et trait& au moyen de divers solvants appropriCs. Par separation chromatographique on a identifiC les diffkrentes derives nitrCs du stabilisant constitue par la dicetone 1,3.
Reaktionen mit 2-Methyl-6-phenylthiazolo(3,2-b) -s-triazol-3 (2H) -on und 7-Phenylthiazino (3,2-b) -s-triazol-4(2H, 3H) -on 5-Phenyl-l,2,4-triazoline-3-thione (1) reacts with chloroacetic acid to give 5-phenyl-3-carboxymethylthio-l,2,4-triazole (2). Cyclisation of 2 by the action of acetic anhydride or phosphorous oxychloride yields G-phenylthiazolo[3,3-b]-s-triazol-3(2H)-one (3) 111.
2,4,6-Triphenyl-thialo[3,2-a-]-s-triazin als Stabilisator fur einbasige Treibladungspulver 2,4,6-Triphenyl-thiazolo[3,2-a]-s-triazin wurde als Stabilisator fur einbasige Treibladungspulver eingesetzt und gibt gute Ergebnisse bei den Stabilitatstests. Ein Vergleich der Ergebnisse der Stabilitatsund Lagerungspriifungen bei 80°C, 90°C und 100°C mit den Resultaten derselben Tests unter Verwendung von Diphenylamin anstelle der Thiazol-Verbindung zeigt keine Unterschiede zwischen den beiden Stabilisatoren. La 2,4,6-triph6nyl-thiazolo [3,2-a]-s-triazine comme agent stabilisant des propergols solides ir simple base O n a utilisC la 2,4,6-triphCnyl-thiazolo [3,2-a]-s-triazine comme agent stabilisant de propergols solides a simple base et les Cpreuves de stabilitk ont montrC que ce produit Ctait efficace. Une comparaison des rksultats des Cpreuves de stabilitk et de stockage 8O"C, 90°C et 100°C obtenus avec un propergol stabilisk par ce composk du thiazol et ceux fournis par un propergol stabilisk par L a diphtnylamine, ne prksentent pas de diffkrences.Summary 2,4,6-Triphenyl-2,3,4,7-tetrahydro-thiazolo[3,2-a]-s-triazine is used as a stabilizer for single base propellant and gave good results with the stability tests. Comparing the results of the stability and storage tests at 80"C, 90°C and 100°C with the results of the same tests after using diphenylamine instead of the thiazolo compound gave the same results without difference between the two stabilizers.2,3,4,7-Tetrahydro-2,4,6-triphenyl-thiazolo[3 ,Za]-s-triazine was prepared by the author and the structural assignment has been based(') on IR and NMR. The presence of 3 phenyl rings in the molecule gives a good chance for the absorption of nitrogen oxide gas. The compound is easily soluble in etheralcohol mixture, a process which facilitates the gelatinization of the nitrocellulose, due to simplicity of its grinding into fine powder which helps the homogenity in the mixture to take place easily. Also, the basicity of the molecule encouraged to use it as a stabilizer for single base propellant.The stability tests are carried out on the sample (I) and the results are compared to the reference sample (11) prepared by using 1.2% diphenylamine instead of the thiazolo compound under the same preparation conditions. The results are tabulated as seen in Table 1.To ensure the suitability of the thiazolo compound for using as a stabilizer for single base propellant, some trials were done. For this purpose, suitable quantities of the two samples (I, 11) were stored in 3 apparatus (the same apparatus of the storage test at 100°C) at 3 different temperatures (80 "C, 90"C, and 100°C) by using the same glass tubes of the storage test@) at 100 "C. Samples were taken from the apparatus periodically as shown in Table 2 to separate and to determine the ratio of the rest of stabilizer in each one after its extraction by ether and ethyl alcohol. Table 1. Stability Tests compared with Diphenylamine and Thiazolo Compound The composition mixture of the sample (I) contained different compounds...
5‐Aryl‐3‐carboxymethylthio‐1,2,4‐triazoles 2 are cyclised to 6‐arylthiazolo[3,2‐b]‐s‐triazol‐3(2H)‐ones 3. This structural assignment has been based on IR and NMR spectra. 2‐Arylmethylene‐6‐arylthiazolo[3,2‐b]‐s‐triazol‐3(2H)‐ones 7 were prepared by several methods. Compounds 3 coupled with diazotised anilines to give 2,3‐dihydro‐6‐arylthiazolo[3,2‐b]‐s‐triazole‐2,3‐dione 2‐arylhydrazones 8. The action of amines on 3a opens the thiazolone ring with the formation of substituted (5‐phenyltriazol‐3‐ylthio)‐acetamides 9.
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