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Yang Q.,Southwest University of Science and Technology | Peng B.-H.,Southwest University of Science and Technology | Liang G.,Luzhou North Chemical Industries Co. | Luo Q.-P.,Southwest University of Science and Technology | Pei C.-H.,Southwest University of Science and Technology
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2012

Nitrated bacterial cellulose (NBC) was synthesized from bacterial cellulose (BC) by nitric-sulfuric acid method. The results showed that the network structure of BC were not obviously degraded by this method and the stability of nitrated bacterial cellulose reached the standard for A degree of nitrocellulose. The thermal decomposition activation energy calculated by differential scanning calorimetry results is 212.53 kJ/mol, and the thermal stability of nitrated bacterial cellulose is better than nitrocellulose. Source


Xu W.,North University of China | An C.,North University of China | Wang J.,North University of China | Dong J.,Luzhou North Chemical Industries Co. | Geng X.,Binzhou University
Propellants, Explosives, Pyrotechnics | Year: 2013

A new insensitive booster explosive based on 2,6-diamino-3,5- dinitropyrazing-1-oxide (LLM-105) was prepared by a solvent-slurry process with ethylene propylene diene monomer (EPDM) as binder. SEM (scanning electron microscopy) was employed to characterize the morphology and particle size of LLM-105 and molding powder. The mechanical sensitivity, thermal sensitivity, shock wave sensitivity, and detonation velocity of the LLM-105/EPDM booster were also measured and analyzed. The results show that both mechanical sensitivity and thermal sensitivity of LLM-105/EPDM are much lower than that of conventional boosters, such as PBXN-5 and A5. Its shock wave sensitivity is also lower than that of PBXN-5 and PBXN-7. When the density of charge is 95 % TMD, its theoretical and measured detonation velocities are 7858 m s-1 and 7640 m s-1, respectively. These combined properties suggested that LLM-105/EPDM can be used as an insensitive booster. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


He X.-J.,University of Sichuan | He X.-J.,Luzhou North Chemical Industries Co. | Xu X.,Luzhou North Chemical Industries Co. | Du L.-P.,Luzhou North Chemical Industries Co. | And 2 more authors.
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2011

In order to improve mechanical property of nitroamine propellant containing a large amount of high-energy solid filler, a certain amount of thermoplastic elastomer (TPE) was added. Through low-temperature drop weight test, charpy impact test for impact-resistance measuring and the closed-bomb test, the mechanical property and static combustion performance of nitroamine propellant containing the thermoplastic elastomer were studied. Results show that thermoplastic elastomer is able to effectively improve low-temperature tenacity and impact-resistance strength of the nitroamine propellant, and burning rate of the nitroamine propellant can be decreased by about 10%, burning rate pressure exponent of the nitroamine propellant can be reduced by about 2%. Source


Zhu L.,Luzhou North Chemical Industries Co. | Wu Y.,Assembly Military Representative Office in the Luzhou Area | Dong J.,Luzhou North Chemical Industries Co. | Mao C.-Y.,Assembly Military Representative Office in the Luzhou Area | You D.,Luzhou North Chemical Industries Co.
Binggong Xuebao/Acta Armamentarii | Year: 2012

Variable burning rate propellant is composed of layers of propellants which has the different burning rates. In order to explain the progressive combustibility of variable burning rate propellant, the three double-layer variable burning rate propellant samples were prepared, which had different inner to-outer layer thickness ratios. The shape feature amount and shape function were calculated. The graphic results of σ-Z and ω-Z show that, with the decrease in the thickness of combustion layer, the combustion area is gradually increased, and the growth rate of gas volume increases. Compared with the classic 5/7 propellant, the variable burning rate propellant has a more significant increase in growth surface, and a stronger progressive combustibility. p-t values of the samples were measured by closed bomb test, and Γ-Ψ curve was drawn. The results show the conditions of the progressive combustibility of samples with different inner-to-outer layer thickness ratios. The result from the closed bomb test result is consistent with the theoretical analysis. Source


Zhu L.,Luzhou North Chemical Industries Co. | Ou J.-Y.,Luzhou North Chemical Industries Co. | Yang X.-Y.,Luzhou North Chemical Industries Co. | Wang Y.-J.,Luzhou North Chemical Industries Co.
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2012

Al powder, RDX and catalysts was coated by nitrocellulose and formed composite spherical green powder. The modified double-based propellant product was produced by the composite spherical green powder. The effects of the composite spherical green powder on mechanical and combustion properties of formed propellant were studied. Results show that their mechanical properties are much better than that of double-based spherical green powder made propellant. Their low temperature elongation at break from is increased from 7.84% to 26.86%, the max ensile strength at high temperature is close to double increase, and the temperature pressure index is decreased from 0.38 to 0.30. Source

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