Abstract:This paper describes the thin-layer flexible explosive tapes made fro a micron or submicron explosive particles.The advantages of the tape are:small critical thickness,using little explosive,high detonation velocity,high initiating ability,small destructibility on neighbouring instruments,etc. Experimental results obtained for detonation properties of the tape are as follow: Detonation velocity:8030m/s(0.04—0.06 in thickness) Critical thickness:30μm(2mm in width) Turning ability for detonation propagation:≥135^。 Initiating ability: Thin-layer explosive tape can reliably initiate PETN/wax 95/5 pellets.

Abstract:In study of polynitrocompounds it is found that a dense crystal must not necessarily be constructed from dense molecules,and the main factors affecting the crystal structure are the electronic structure of their molecules.The correlation between the value of non-bonded intramolecular contact and the magnitude of the respective intermolecular contact seems to be unusual for this kind of Compounds.Alkoxydiazene-N-oxide and 1, 1, 4, 4,-tetranitrobutanediol-2,3 derivatives were taken as examples in this study.The obtained results concluded that the intramolecular interaction can stabilize the crystal conformation,while the increase in the intermolecular contact decreases the crystal density.

Abstract:The preliminary results of diamond synthesized by the detonation of TNT-RDX explosive were reported.The content of diamond in the black solid product collected from the wall of the container after detonation was 27～30％.By treatment with mixed acids the product containing more than 90％ diamond was obtained,the yield was about 6％.TEM results indicated that the particle size of diamond is 3～15nm.

Abstract:This paper introduces the physico-chemical properties of lead,copper and ammonium salts of NTO.Their contribution to burning rate,pressure exponent and energy in RDX-CMDB propellant were researched.It is found that NTO salt is a new type energetic plateau combustion catalyst in higher pressure range.

Abstract:The tensile stress-strain curves of explosive JO-9159 were determined by using the method of adherence-tension and globe-grip tension at different rate,temperature and loading course.The tensile stress-strain curves of TNT/RDX 40/60 at different crosshead rate and temperature were given as well.The data from every curve were fitted according to the plasticity theory and derivated the mathematic model showing definite physical meaning.

Abstract:The presence of minimum value of initiation impulse in K-I curve is proved by the examination of firing current(I) and initiation impulse(K)of commercial electric detonators.The definition of initiation impulse involved in the standard GB8031 is further supplemented;the importance to define the term of indexes of minimum initiation impulse and maximum no-fire initiation impulse is suggested,and the reason is elucidated that the value of firing probability should be changed from 99.99％ into 50% during measuring the firing current in 100ms with up-and-down method.

Abstract:High speed photography was used to determine the random variables of electrical detonator properties such as action time,and their synchronism was characterized with the initiation time difference (ITD) obtained therefrom.Studying the functional relation between the batch detonators’ initiation synchronism standard deviation (ISSD)and the samples’ITD shows,when the ISSD of the batch detonators is given, the ITD of samples consisting of n detonators will not exceed the stipulated probability. On the contrary,if the samples’ITD does not exceed the stipulated probability,the ISSD of batch detonator can be found out,and the measuring error is less or equal to 0.03μs.This method is valuable for both research and application of electrical detonators.

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