摘要:

AbstractThe response fo high explosives to accidental stimuli like bullet impact or thermal aggression is largely dependent on their combustibility, then on their combustion mechanism. The need of products with limited DDT hazard has led to the works presented in this paper. The aims were:to develop a tool allowing to detect the unusual burning process leading to the DDTto improve the knowledge about these processes, and about the features of the high explosives which influence these processes.These works have been performed by studying both classical melt cast high explosives and cast cured (plastic bonded) PBXs.

ISSN:0721-3115    

DOI:10.1002/prep.19910160402

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractCombustion behavior of B/MA/AP/HTPB fuel rich propellants containing different coated boron particles was studied with several diagnostic facilities such as windowed strand burner, CO2laser ignition facility, rapid depressurization quenched device, thermal analyzer and micromotor static test. Materials selected for boron coating include LiF, Viton A and silane. Baseline propellant containing uncoated boron was also studied for comparison Results from windowed strand burner and static test show that LiF‐propellant exhibits the most remarkable overall behavior. Ignition study indicates that LiF‐propellant gives the shortest while Viton A‐propellant gives the longest ignition time under the same heat flux. Moreover, mechanisms were proposed to elucidate the experimental results and the observed combustion phen

ISSN:0721-3115    

DOI:10.1002/prep.19910160403

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractA study has been conducted to investigate the relationship between binder molecular structure and the mechanical/rheological properties of solid propellants. Beginning with the mechanical property requirements dictated by the motor grain operating conditions as well as rheological constraints imposed by available processing technology, the approach taken was to work backwards to obtain the ideal molecular structure of a solid propellant binder. Structural/processing requirements were determined from the demands of three typical rocket motor applications: space transfer, launch vehicle/ballistic missile, and tactical air‐to‐air. Three general formulation approaches to meet the demands of these applications were considered. These include traditional composite and nitrate ester plasticized formulation approaches, in addition to a hypothetical all‐binder propellant. For each of these three formulation approaches, a variety of polymer molecular characteristics were defined in terms of molecular weight, crosslink density, solubility parameter, chain stiffness, monomeric friction coefficient, volume fraction filler, and volume fraction plasticizer. Characterization data for ten polymeric binder systems are reported to show how their molecular architecture influences the resulting propellant prope

ISSN:0721-3115    

DOI:10.1002/prep.19910160404

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractA new type of double‐base propellant which contains GAP was studied in order to elucidate the burning rate characteristics and combustion wave structure. This class of propellants is termed “nitro/azide propellants”. Experimental results revealed that the burning rate and temperature sensitivity are increased when 12.5% DEP is replaced with 12.5% GAP. The reaction rate in the dark zone is increased by the replacement of DEPo with GAP. However, the gas phase structure of NG/NC/GAP propellant is fundamentally the same as that of NG/NC/DEP propellant and the basic chemical reaction mechanism in the gas phase zone remains unchanged for both propel

ISSN:0721-3115    

DOI:10.1002/prep.19910160405

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractAfin de mieux maîtriser les phénomènes de cristallisation des huiles nitrées dans les propergols, une étude systématique a été menée sur les quatre esters nitriques suivants: nitroglycérine, trinitrate de butanetriol, trinitrate de triméthyloléthaue, dinitrate de triéthylène glycol. Les essais réalisés ont permis de déterminer les caractéristiques de fusion de ces quatre composés, précisant ainsi les données de la littérature, parfois incomplètes ou variables selon les auteurs. L'incidence de la température sur la crossance cristalline a été étudiée sur les quatre esters nitriques, alors que la nucléation a été plus particulièrement considérée pour la nitroglycérine et le trinitrate de triméthyloléthane, ces deux huiles nitrées pouvant prése

ISSN:0721-3115    

DOI:10.1002/prep.19910160406

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractThe effects of pressure on the chemical reactivity, phase behaviour and thermal decomposition of energetic materials can be studied by a combination of measurement techniques in conjunction with a high pressure diamond anvil cell and the ruby fluorescence method of pressure measurement. These techniques include: (1) optical polarizing microscopy and (2) Fourier transform infrared (FTIR) spectroscopy. Recent results on the study of 1,4‐dinitrocubane and cubane will be presente

ISSN:0721-3115    

DOI:10.1002/prep.19910160407

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractThe role of liquid propellants in insensitive munitions policy has been reviewed. Liquid propulsion systems meet the policy requirements by giving a reaction no more severe than burning and mitigation techniques can be applied to limit even this response.

ISSN:0721-3115    

DOI:10.1002/prep.19910160408

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractOn the basis of the steady state model of detonation, using Becker‐Kistiakowsky‐Wilson equation of state for gaseous products of detonation and Cowan‐Fickett equation of state for solid carbon, algorithm and computer program for the calculation of the detonation properties of CHNO type explosives are developed. The program has been tested by the comparison of the calculated data with experimental ones for some high explosives being of different densities and compositions. The calculated data have also been compared with data obtained by program FOR‐TRAN BK W. Both comparisons gave satisfact

ISSN:0721-3115    

DOI:10.1002/prep.19910160409

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19910160410

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19910160401

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY