摘要:

AbstractTwelve nitro‐ or chloroaromatic amines were oxidized to the nitro analogues by a simplified procedure. Limitations of the method are indicate

ISSN:0721-3115    

DOI:10.1002/prep.19760010502

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractA thin‐layer chromatographic method was developed in connection with the determination of the safe lifetimes of gun propellants. This method enabled the numerous stabilizer reaction products of diphenylamine and ethylcentralite, which were formed on storage, to be qualitatively analysed.Since a correlation could be established between the temperature and the decomposition or formation of certain of these reaction products, it became possible to estimate the time of onset of autocatalytic decomposition of powders and solid propellants from an analysis of the material at much earlier time

ISSN:0721-3115    

DOI:10.1002/prep.19760010503

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractSteady state detonation velocities have been measured in small brass‐confined pressings of PETN. These velocities were found to vary linearly with the reciprocal of the charge diameter and directly with the compact density. For a pressing density of 950 kg/m3the velocity at infinite diameter was calculated to be 5.27 km/s (50.02 kmk) and the Eyring‐type „reaction‐zone length”︁ 0.54 mm

ISSN:0721-3115    

DOI:10.1002/prep.19760010504

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractPicramates of titanium, zirconium and thorium are prepared by treating the aqueous sulphate, chloride and nitrate solutions with sodium picramate. Micro‐analysis, colorimetry and spectrophoto‐ metry are used to establish the compositions (metal : ligand ratio) of these picramates as 1 : 2 (for titanium and zirconium) and 1 : 4 (for thorium). IR studies indicate H2N → Me coordination (where Me denotes the metal). A number of explosive properties of these picramates point to the fact that the zirconium picramate is thermally more stable than the picramates of titanium and th

ISSN:0721-3115    

DOI:10.1002/prep.19760010505

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractLead has for a long time not been employed in explosive cladding because its velocity of sound (c = 1250 m/s) is very low compared to the detonation velocities of conventional explosives (vD ≈ 3000 m/s). I t is shown that by using a carbonite explosive, which has a detonation velocity of less than 1500 m/s, useful explosive cladding can be achieved. The relationship between quantity of explosive and cladding parameters such as angle of collision and plate velocity vp is determined. The interface between lead‐copper and lead‐steel claddings is wave‐like. The wavelength depends on the angle of collision and is larger for lead‐copper claddings than for those between lead

ISSN:0721-3115    

DOI:10.1002/prep.19760010506

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractThe mechanism of the thermal decomposition of hydrazinium diperchlorate (HP‐2) has been investigated in the temperature range 100–200°C. l he decomposition can be represented by the chemical equations:\documentclass{article}\pagestyle{empty}\begin{document}$$\begin{array}{l}{\rm Below 140}^{\rm \circ} {\rm C}\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm N}_{\rm 2} {\rm H}_{\rm 6} {\rm (ClO}_{\rm 4} {\rm)}_{\rm 2} \to {\rm N}_{\rm 2} {\rm H}_{\rm 5} {\rm ClO}_{\rm 4} {\rm + HClO}_{\rm 4}\\{\rm Above 140}^{\rm \circ} {\rm C}\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm 24 N}_{\rm 2} {\rm H}_{\rm 6} {\rm (ClO}_{\rm 4} {\rm)}_{\rm 2} \to 8{\rm NH}_{\rm 4} {\rm ClO}_{\rm 4} {\rm + 42 H}_{\rm 2} {\rm O + 26 HClO}_{\rm 4} {\rm + 14 N}_{\rm 2} {\rm O + 7 Cl}_{\rm 2} {\rm + 6\,N}_{\rm 2} {\rm + H}_{\rm 2} \\\end{array}$$\end{document}The solid state decomposition up to 180°C ensues with an activation energy of 23 kcal/mole whereas above 180°C in the molten state the activation energy is 35 kca

ISSN:0721-3115    

DOI:10.1002/prep.19760010507

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractExplosion times of PETN pressings and PETN/tetryl assemblies have been measured as a function of the length and density of the PETN donor charge and the density of the tetryl acceptor. A charge length of about 3.5 mm is necessary for the PETN explosion wave to reach steady‐state velocity for the densities studied. The initiation of the tetryl pellet is related to the detonation velocity (and presumably peak pressure) as well as the pressure‐distance profile generated in the PETN explosion wave. Higher‐density tetryl charges appear to be more sensitive than

ISSN:0721-3115    

DOI:10.1002/prep.19760010508

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

摘要:

AbstractAn improvement in internal ballistic performance is understood to mean an increase in muzzle velocity for the same weight of projectile and the same peak pressure. Using a thermodynamic model of the internal ballistics a possible method of achieving a significant improvement in performance is demonstrated based on optimizing the properties of the propellant in a charge of conventional design. An example of the application of the theoretical results is discussed.

ISSN:0721-3115    

DOI:10.1002/prep.19760010509

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19760010510

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19760010501

出版商:WILEY‐VCH Verlag GmbH    

年代:1976

数据来源: WILEY