摘要:

AbstractScanning electron microscopy (SEM) and X‐ray photoelectron spectroscopy (XPS) have been used to examine the nature and quality of wax‐coated RDX crystals. SEM allows a visual assessment of wax‐coated crystals and comparison of different coating processes. XPS has allowed a semiquantitative determination of the degree of wax coverage by measurement of the carbon to nitrogen photoelectron emissions and calculation of the percentage of wax coverage using a simple mathematical trea

ISSN:0721-3115    

DOI:10.1002/prep.19850100302

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractThere is described the application of an automated vacuum stability test in following the decomposition and the stability of single base propellants. The relations of the propellant decomposition rate, evaluated from the loss of stabilizer, to the decomposition rate measured at the stability test were verified. The data obtained indicate the applicability of the vacuum test to check the chemical stability of propellants.

ISSN:0721-3115    

DOI:10.1002/prep.19850100303

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractEvidence for the existence of an interphasic region in the nitroglycerin‐nitrocellulose matrix immediately surrounding the crystalline nitroguanidine filler in triple base propellant is presented for the first time. This interphasic region displays anomalous thermal expansion and mechanical relaxation behaviour compared to the bulk nitroglycerin‐nitrocellulose matrix in the propellant. The interphasic region accounts for the highly unusual thermal expansion behaviour of triple base propellants containing long needlelike nitroguanidine crystals. An interphasic region does not occur in similar propellant when the nitroguanidine filler is replaced by crystalline RDX. Thus the interphase region is thought to be a manifestation of a significant bindernitroguanidine interaction. Implications for munition survivability stemming from the existence of a separate polymeric interphase are discussed in terms of the thermal and relaxation behaviour of the interphasic binder‐crystalline filler inte

ISSN:0721-3115    

DOI:10.1002/prep.19850100304

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractIt is shown that distance from the virtual origin reached by the shaped charge jet at the moment of particulation is proportional to the square root of the kinetic energy per unit directrix length which is delivered to the liner by the explosive. This relation helps in better understanding some basic shaped charge design problems. It also points at the possible existence of a convenient way for comparing the yield strength in the jet, between different materials.

ISSN:0721-3115    

DOI:10.1002/prep.19850100305

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractThe use of unsaturated polyesters for inhibition of double‐base rocket propellants has become popular in recent years. A direct bonding inhibition system termed as semiflexible unsaturated polyester resin‐4 has been recently developed and reported by us. It has been reported in literature that the use of some fillers such as antimony trioxide, titanium dioxide, lithophone, alumina trihydrate etc. impart better mechanical and heat resistance properties. The effect of 10% to 60% of alumina trihydrate (Al2O3· 3 H2O) on semiflexible unsaturated polyester resin‐4 in respect of gel time, exotherm peak temperature, tensile strength, %‐elongation, nitroglycerin absorption, water absorption, heat resistance and flame retardance has been studied and the result obtained have been discussed. It is observed that 30% of alumina trihydrate imparts desirable properties. The 108 mm and 148 mm‐diameter propellant sustainers inhibited with resin‐4 containing 30% alumina trihydrate and conditioned at ambient, sub‐zero temperature (−40°C for 18 hr) and high temperature (+50°C for 18 hr) were statically evaluated. The pressure‐time profiles at all temperatures have been found to be flat and neutral which infer that the inhibition system

ISSN:0721-3115    

DOI:10.1002/prep.19850100306

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

Abstract2,4,6‐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

ISSN:0721-3115    

DOI:10.1002/prep.19850100307

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

摘要:

AbstractAmmonium nitrate doped with diammine copper dinitrate and stored for 10 years was reinvestigated by DTA and TMA. The phase transition IV/II and IV/III, which are of interest for the practical use, still occur above 50°C. In spite of moisture contents between 0.4% and 1.4% no caking was observed

ISSN:0721-3115    

DOI:10.1002/prep.19850100308

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19850100301

出版商:WILEY‐VCH Verlag GmbH    

年代:1985

数据来源: WILEY