• Journal of the Korean Society of Propulsion Engineers
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• v.2 no.3
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• pp.70-79
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• 1998

The PEG and PCP have been used as a binder of high energy and minimum smoke propellant. In this study, PEG, PCP 0260, PCP 1270 and mixed PEG/PCP as a prepolymer were used, and also used BTTN/DEGDN and BTTN/TMETN as a plasticizer. Before being cured, the solution viscosity of prepolymer and plasticizer was measured with various contents of PCP in PEG and contents of plasticizer at $20^{\cire}C$~$60^{\cire}C$. The results were shown the increased concentration of PCP enhanced the viscosity of solution due to the hydrogen bond of PCP, and the increased contents of plasticizer undoubtedly decrease the viscosity of solution. The cured binders were tested for mechanical properties and measured for glass transition temperature with various concentration of PCP in PEG and contents of plasticizer. The increased concentration of PCP has shown better mechanical properties. This results were attributed to the H-bond. Also, the glass transition temperature was lowered with the higher contents of PCP Finally, with the higher content of PCP in PEG, the better mechanical properties and the lower glass transition temperature and the higher viscosity of solution were shown.

• Journal of the Korean Society of Propulsion Engineers
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• v.23 no.1
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• pp.71-78
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• 2019

This paper describes the formulation and properties of a recently developed energetic thermoplastic (ETPE) propellant, which is composed of 45% of newly synthesized glycidyl azide polymer, energetic plasticizer (DEGDN) and nitramine oxidizer (RDX). Compared to conventional thermoplastic propellants, the new ETPE propellant showed approximately 7% higher performance and exhibited similar mechanical properties but a lower burn rate and a higher pressure exponent.

• Journal of the Korea Institute of Military Science and Technology
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• v.25 no.3
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• pp.321-328
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• 2022

The current development tend of the gun propellants that they should have low sensitivity and high energy. We studied a nitrocellulose based propellant composition that replaced sensitive NG with RDX and DEGDN which high energy and low sensitivity. The important factors in the design of the gun propellant were impetus and flame temperature. NC-based propellant containing RDX showed similar impetus but low flame temperature compared to KM30A1, a triple-based propellant. The developed propellant composition didn't show any abnormal combustion reaction and the characteristics of ballistic resistance were also confirmed.

• Journal of the Korean Society of Propulsion Engineers
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• v.24 no.3
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• pp.41-46
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• 2020

In this study, measurement and analysis results from Differential scanning calorimetry(DSC) and Thermogravimetric analysis(TGA) on the newly developed high-energy thermoplastic elastomer(ETPE) propellant are described, followed by the previous study done under the same title as this paper [1]. The characteristics of high-energy thermoplastic propellant were also verified by conducting thermal analysis, and the LSGT, Shotgun & RQ Bomb test, was carried out as well. High energetic thermoplastic binders containing 45% of GAP(Glycidyl Azide Polymer), energetic plasticizer(DEGDN) and Oxidizer Aonium Perchlorate), RDX(reseach development explosive, cyclotrimethylenetrinitramine) were used to formulate the propellant.

• Journal of the Korea Institute of Military Science and Technology
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• v.27 no.3
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• pp.428-435
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• 2024

The important factors in the design of the gun propellant are impetus, flame temperature and pressure. In this paper, we considered a nitrocellulose based propellant composition that replaced sensitive NG(Nitroglycerin) with RDX(Cyclotrimethylenetrinitramine) and DEGDN(Diethylene glycol dinitrate) which high energy and low sensitivity. Particle size and content of RDX are the two main factors that affect the burning stability of RDX-based propellants. Among them, the characteristics of the propellant according to the particle size of RDX were confirmed. The relative combustion rate(R.Q., Relative Quickness) of the propellant changed according to the RDX particle size, and internal ballistics of properties of propellant were also varied. The particle size of RDX can be confirmed as a major factor in the combustion and internal ballistics characteristics of the propellant.