Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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The Study on the Shelf Life of the Combustible Cartridge Case by the Stabilizer(DPA, ECL) and Migration of Nitroglycerin

니트로글리세린의 이동과 안정제(DPA, ECL)에 의한 소진탄피 저장수명 연구

  • Lim, Hoyoung (Directorate of Quality Management, Defense Agency for Technology and Quality) ;
  • Jang, Ilho (Directorate of Quality Management, Defense Agency for Technology and Quality) ;
  • Seo, Jihyun (Ammunition Technical Research Center, Ammunition Support Command) ;
  • Jung, Yonggeun (Ammunition Technical Research Center, Ammunition Support Command) ;
  • Jo, Minsoo (Quality Assurance 2nd Team, Hanwha Co.) ;
  • Han, Changho (Quality Assurance 2nd Team, Hanwha Co.)
  • 임호영 (국방기술품질원 품질경영본부) ;
  • 장일호 (국방기술품질원 품질경영본부) ;
  • 서지현 (육군 탄약지원사령부 탄약기술연구소) ;
  • 정용근 (육군 탄약지원사령부 탄약기술연구소) ;
  • 조민수 ((주)한화 여수사업장 품질보증 2팀) ;
  • 한창호 ((주)한화 여수사업장 품질보증 2팀)
  • Received : 2019.03.15
  • Accepted : 2019.06.21
  • Published : 2019.08.05
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Abstract

It is well known that nitroglycerin(NG) may evaporate and migrate from the triple base propellant grains in storage. This physical process makes it double base environment to the CCC(combustible cartridge case) which is based on nitrocellulose(NC) without NG. Meanwhile, it is not appropriate to use diphenylamine(DPA) as a stabilizer for CCC in this double base environment because of incompatibility between DPA and NG. So we estimated the shelf life to study the effect of NG migration from propellant to CCC by following the procedures in the STANAG 4257. And we found out that CCC with ethylcentralite(ECL) has 7.5 years longer shelf life than with DPA, when NG migrates to CCC from triple base propellant grains.

Keywords

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Fig. 1. Procedure of making specimen for accelerated aging test

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Fig. 2. Procedure of making specimen

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Fig. 3. Chamber for accelerated aging test

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Fig. 4. Consumption of DPA in CCC

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Fig. 5. Consumption of DPA in CCC with TBP

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Fig. 6. Consumption of ECL in CCC

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Fig. 7. Consumption of ECL in CCC with TBP

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Fig. 8. Arrhenius plot of the reaction rate constants of the DPA consumption in CCC

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Fig. 9. Arrhenius plot of the reaction rate constants of the DPA consumption in CCC with TBP

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Fig. 10. Arrhenius plot of the reaction rate constants of the ECL consumption in CCC

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Fig. 11. Arrhenius plot of the reaction rate constants of the ECL consumption in CCC with TBP

Table 1. Accelerate aging test conditions of CCC

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Table 2. Consumption of DPA in CCC

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Table 3. Consumption of DPA in CCC with TBP

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Table 4. Reaction rate constants of the consumption of DPA on the temperature

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Table 5. Consumption of ECL in CCC

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Table 6. Consumption of ECL in CCC with TBP

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Table 7. Reaction rate constants of the consumption of ECL on the temperature

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Table 8. Kinetic parameters of the consumption of DPA

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Table 9. Kinetic parameters of the consumption of ECL

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