摘要:

AbstractAn evaluation on coating HMX crystals with three different polymeric binders using the “solvent slurry process” was conducted. Three polymers employed were:–a thermoplastic copolymer [Kel‐F 3700],–a thermoplastic elastomer [kraton‐G 1650] and–a polyurethane [Impranil DLH].Kel‐F 3700 presented an electrostatic hazard and was too insoluble for application by the slurry process. Kraton‐G 1650 presented a similar electrostatic hazard and its process yield was low. Impranil DLH produced a high yield using the bat

ISSN:0721-3115    

DOI:10.1002/prep.19920170602

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractA method will be proposed for determining the detonation velocity for a very large charge, using only a small specimen. In detail will be described the background theory, the layout of test charges, the test set‐up used, and the results obtaine

ISSN:0721-3115    

DOI:10.1002/prep.19920170603

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractThermal analysis and FT‐IR spectrometry were used to characterize the urethane reaction mechanism of polyglycidyl azide (GAP) propellants with powdered amorphous boron. The amorphous boron added GAP propellant with trimethylol propane (TMP) vigorously gassed of during the cure process and did not complete its urethane reaction. Although it was curable by excess amount of isocyanates, voids or bubbles were trapped inside the propellant grain. Since the powdered amorphous boron was relatively hygroscopic compared to other crystalline metal powders, it might contain boron surface impurities, namely, water, boric acid, and/or boron oxide which disturbed the urethane reaction. TMP was also relatively hygroscopic and played an interesting role on the propellant processing, which was used for cross‐link and surface treatment agent of powdered amorphous bo

ISSN:0721-3115    

DOI:10.1002/prep.19920170604

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractThe UK Health and Safety Executive's (HSE) Explosion and Flame Laboratory in buxton has its roots in coal‐mining safety, undertaking research into mining explosives in 1926. But today, in support of the HSE's duties across a wise range of industries, energetic materials research at Buxton covers testing, detonation, chemical analysis, thermal stability, blast characteristics, characterization, classification, thermal radiation and deflagration studies encompassing mining and commercial explosives and energetic and self‐reactive substances. International collaboration occurs on a number of fronts and is increasingly sought in pursuing HSE's aims in safety promot

ISSN:0721-3115    

DOI:10.1002/prep.19920170605

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractCastable aluminized plastic‐bonded explosive (PBX) is a multiple components blending. To find an optimum mixture blending (formulation) for PBX to meet several required specifications is formidable. This is due to the fact that there are unlimited candidate formulations from which an appropriate one could be chosen. In general, trial and error type of engineering judgement is still the primary approach to reach the desired goal.This paper, however, employs a statistical approach namedMixture Experimentsas well as an optimization routine calledEurekato find the optimum formulation, which meets five required specifications. Finally, two confirmation runs are performed. The results justify that the theroretical solution derived from the systematic statistical approach is indeed applicabl

ISSN:0721-3115    

DOI:10.1002/prep.19920170606

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractProbit analysis is an efficient method for analyzing sensitiveness test data. If the aim is to determine themedian stimulus value, the choice of stimulus scale is of minor importance. If, on the other hand, extreme frequencies are to be predicted, great care should be taken in the selection of an appropriate stimulus scale. A scale incorporating an upper and a lower stimulus level corresponding to explosion probability 1 and 0, respectively, is suggested. In an illustrative example this scale is shown to involve considerably less bias than either a simple linear or logarithmic scale.

ISSN:0721-3115    

DOI:10.1002/prep.19920170607

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractThe critical temperature of thermal explosion for 3‐nitro‐1,2,4‐triazol‐5‐one (NTO) and its ethylenediammonium salt (ENTO), potassium salt (KNTO), copper salt (CuNTO) and lead salt (PbNTO) were obtained using the stationary theory of thermal explosion, the calculation formula of estimating the critical temperature of thermal explosion under non‐isothermal DSC condition, and the determination method for the critical temperature of thermal explosion of small‐scale solid explosive and its data treatment method. The results of the four methods are agreeable to each other, whose differences are within 5%. The results indicate that the heat‐resistance ability of NTO and its salts and of the common explosives, cyclotetramethylenetetranitramine (HMX), cyclotrimethylenetrinitramine (RDX), pentaerythritoltetranitrate (PETN) and tetryl decreases in the order HMX>NTO>ENTO>KNTO>RDX>PETN>tet

ISSN:0721-3115    

DOI:10.1002/prep.19920170608

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractDucted rockets operate with the combustion of fuel‐rich gas generated in a primary combustor and the ram‐air induced from the atmosphere to a secondary combustor. Thus, the combustion performance depends on the mixing and reaction processes of the fuel‐rich gas and the air flow in the secondary combustor. The energetic solid fuels examined in this study consisted of ammonium perchlorate based composite propellants containing boron particles. The combustion efficiency of boron particles in the secondary combustor was determined as a function of air‐mixing process and air/fuel ratio. Two types of air‐inlet were used to evaluate the combustion of boron particles. Combustion tests conducted by direct connect flow indicate that the combustion efficiency increased significantly when a multi‐port consisting of two forward‐ports and two rear

ISSN:0721-3115    

DOI:10.1002/prep.19920170609

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

摘要:

AbstractTyhe influences of acidity and dipentaerythritol hexanitrate (DiPEHN) on the thermal sensitivity of pentaerythritol tetranitrate (PETN) was studied using differential scanning calorimetry (DSC). Decomposition kinetics of PETN with or without DiPEHN, acidic PETN and DiPEHN were also studied by SC to evaluate Arrhenius parameters. The presence of sulphuric acid impurity decreased the thermal stability as well as the activation energy, whereas the nitric acid influence was negligible. Thermal stability of PETN was not affected by the presence of DiPEHN. DiPEHN showed better thermal stability and higher decomposition energy compared to PETN.

ISSN:0721-3115    

DOI:10.1002/prep.19920170610

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19920170611

出版商:WILEY‐VCH Verlag GmbH    

年代:1992

数据来源: WILEY