| Nowadays, booster network technology is often used to weapon warhead by targeting and efficient damage. The key points of the technology is the study on the formular of the small critical booster and micro injection charging technology. In this paper, a novel GAP/DNTF based booster formula was successfully loaded to the small size network explosion trench by the use of micro injection charging technology, charging technology was optimized by the injection simulation software Moldflow and its molding effect, safety performance, detonation performance were tested and analyzed. The main contents are as follows:The formulation and programs of preparation were studied at first. It mainly contained the following aspects: the choice of binder and subject explosive, application of particle classification, the select of the curing system, plasticizer, surfactant selection and the determination of these contents.The final formulation of the GAP/DNTF based booster explosive was as follows: the main explosive DNTF(85%), in which the coarse part icles 10-15 ?m, fine particles 2-3 ?m, size grading in a mass ratio of 1:1, binder GAP(8.5%), 1,4-butanediol plasticizer(5.5%), silicone surfactant(0.49%), the curing agent, toluene diisocyanate TDI(0.5%), dibutyl tin dilaurate catalyst T-12( 0.01%).Then computer simulation software Moldflow was used to simulate the charging process of GAP/DNTF based booster, after the use of orthogonal experiment the optimum technology parameters was obtained: injection time 70 s, drug slurry temperature 40 oC, moldind temperature 70 oC. The dwell manner was firstly constant voltage, then linear decreasing. Then the effect of obtained optimization of technology parameters was verified. The dynamic scanning calorimetry experime nts was used for the study of GAP-TDI system by DSC, by extrapolation method the obtained curing technology was as follows: starting from 327 Kand slowly raised to the best curing temperature 346 K for the thermostat curing, and finally raised to 374 K maintained a period of time and guarantee system was completely cured.At last, after injection charging and curing process the GAP/DNTF based explosive was obtained with good density property, mechanical shock sensitivity and sensitivity performance, energy output and detonation reliability.High pressure differential scanning calorimetry method PDSC by K issinger method the decomposition kinetics of DNTF raw materials and GAP /DNTF based booster explosive was studied. Thermal decomposition activation energy, critical temperature and other thermodynamic explosion parameters remained stable compared with the raw material. Sensitivity performance tests showed that the addition of binder significantly reduced the impact sensitivity of booster explosive. The explosion drop height was 45.2 cm from the raw material DNTF 17.8 cm; 50% of small explosion separator thickness decreased from 55.4 cm to 10.5 cm. Steel concave experiments and detonation velocity experiments of the booster explosive was used to test the energy performance. The steel concave value measured twice under this solids content was 1.694 mm and 1.685 mm for an average. GAP/DNTF based booster explosive possess more excellent detonation energy than PBXN-5 booster explosive. Detonation velocity tests showed that the actual test detonation velocity in the 0.8 mm×0.8 mm groove is less than the theoretical detonation velocity. The average theoretical detonation velocity and average measured detonation velocity was 7832 m? s-1 and 7360 m?s-1 respectively.Detonation test results showed that the GAP/DNTF booster under a solids content of 85% in the small size of 0.5 mm × 0.5 mm grooves can still detonate reliably. These properties have important significance for the sophisticated explosive used in micro-network. This booster explosive and charging technology have good applications in micro-explosion network. |
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