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Guo F.,Xian Aerospace Chemical Propulsion Factory
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2015

Poly (methyl methacrylate)-b-poly(butyl acrylate) was synthesized via ultraviolet light (UV)-initiated copolymerization of methyl methacrylate and butyl acrylate using 1, 1- diphenylethylene (DPE) as control agent of free radical. The block polymer obtained was characterized by infrared spectroscopy (IR), nuclear magnetic resonance (NMR), and size-exclusion chromatography with multi-angle laser light scattering (SEC-MALLS). The polymerization mechanism was also studied. It is found that DPE could control the UV-initiated polymerization of methyl methacrylate and exist as semi-quinoid structure in poly (methyl methacrylate) with controlled molecular weight and narrow molecular weight distribution. The DPE-containing poly (methyl methacrylate) could initiate polymerization of butyl acrylate, and formed poly (methyl methacrylate)-b-poly (butyl acrylate) under UV irradiation. ©, 2015, Chengdu University of Science and Technology. All right reserved. Source

Wang C.,Northwestern Polytechnical University | Liu H.,China Aerospace Science and Technology Corporation | Yang D.,China Aerospace Science and Technology Corporation | Chen C.,Xian Aerospace Chemical Propulsion Factory
Applied Mechanics and Materials | Year: 2012

To speed the domestic research on double pulse motor, and specify the research direction, analyzed the pulse separation device(PSD) of external double pulse motors, classified them according to certain characteristics, expounded research status of domestic double pulse motor, pointed out problems in the study. With the future needs of the missile force, proposed suggestions of future development for domestic research on double pulse motor, and specified the research direction of it. © (2012) Trans Tech Publications, Switzerland. Source

Chu H.,Xian Jiaotong University | Huang T.,Xian Aerospace Chemical Propulsion Factory | Li X.Y.,Xian Aerospace Chemical Propulsion Factory | Wang G.J.,Xian Aerospace Chemical Propulsion Factory | Wang S.Z.,Xian Jiaotong University
Advanced Materials Research | Year: 2013

This paper deals with the wastewater from solid propellant production containing high level of ammonia nitrogen. The chemical treatment had been made in laboratory, by the selected process, the removal rate of NH3-N is above 92%. © (2013) Trans Tech Publications, Switzerland. Source

Wang G.-J.,Xian Aerospace Chemical Propulsion Factory | Hu R.-Z.,Xian Aerospace Chemical Propulsion Factory | Chu H.,Xian Aerospace Chemical Propulsion Factory
Binggong Xuebao/Acta Armamentarii | Year: 2012

A remote controlled high-pressure water cleaning device, the optimizing cleaning process parameters and a cleaning procedure were established for the safe handling and reuse of the retired or scrapped solid rocket motor. The high-pressure water cleaning device can safely separate the case of solid rocket engine combustion chamber from the propellant. The cleaning efficiency of propellant is greater than 0.8 tons/day. The cases of combustion chamber can be used to recharge. The waste water generated in the cleaning process can achieve the third grade national emission standard after treatment. The separated propellant can be used as the industrial explosives which meet the technical requirements of industrial explosives. The technology can be used to not only eliminate the security risk from dealing the motor propellant with burning way, but also recycle the chamber cases and propellant. Source

Bi J.,Xian Aerospace Chemical Propulsion Factory | Zhang X.-H.,Xian Aerospace Chemical Propulsion Factory | Wang Z.-H.,Xian Aerospace Chemical Propulsion Factory | Zang L.-D.,Xian Aerospace Chemical Propulsion Factory
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2012

To reduce the water content in PGDN(1, 2-propanediol dinitrate)/DBS(dibutyl sebacate) mixed solution, the effect of pressure, spraying times, material temperature and ventilation condition on dewatering effect were investigated using spraying method. The stability test was done. The results show that the water content in mixed solution can be reduced from 0.2428% to 0.0614% under the conditions of 100 g mixed solution, pressure of 0.08 MPa, material temperature of 71 °C and ventilation. The mass recovery of mixed solution after spaying is 100%. Abel value of mixed solution after heating for 15 min in water bath at 80 °C does not change, indicating that the water content in mixed solution can be reduced greatly according to the optimized parameters and this spraying method does not cause material loss or reduction of the stability of the mixed solution. Source

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