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Open AccessArticle

Nitramine-Group-Containing Energetic Prepolymer: Synthesis, and Its Properties as a Binder for Propellant

1
Department of Polymer Science & Chemical Engineering, Pusan National University, Pusan National University, Busan 609-735, Korea
2
Department of Chemistry, Kwangwoon University, Seoul 139-701, Korea
3
Advanced Propulsion Technology Center, Agency for Defense Development, Daejeon 305-600, Korea
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(12), 1966; https://doi.org/10.3390/polym11121966
Received: 23 October 2019 / Revised: 21 November 2019 / Accepted: 27 November 2019 / Published: 29 November 2019
(This article belongs to the Section Polymer Applications)
A composite solid propellant which generates high propulsive force in a short time is typically composed of an oxidizer, a metal fuel powder and a binder. Among these, the binder is an important component. The binder maintains the mechanical properties of propellant grains and endures several thermal and mechanical stresses in the engine. Several studies have been reported for the development of energetic propellant binders for increasing the propellant′s propulsive force. While several materials have been studied for the synthesis of energetic prepolymers, a nitramine-group-containing prepolymer is a suitable candidate because these types of prepolymers are less toxic and more cost-effective when compared to the traditional glycidyl azide polymers (GAP) and triazole-based prepolymers. Considering the lack of studies for the binder using a nitramine-group-containing prepolymers, we synthesized a nitramine-group-containing monomer and polymerized a nitramine-group-containing prepolymer. The prepolymer was then used for the preparation of the binder and its thermal and mechanical properties, as well as the effect of the plasticizer, were studied. The binder that was prepared using the prepolymer containing a nitramine-group showed very high elongation, tensile strength. Nitrate-ester (NE)-type plasticizer could reduce the glassy transition temperature (Tg)of the binder successfully. Also, high-energy is released due to the decomposition of the nitramine-group at around 245 °C, thus exhibiting the efficiency of the nitramine-group-containing prepolymer as an excellent energetic binder material. View Full-Text
Keywords: propellant; binder; nitramine-group-containing polymer; energetic polymer; mechanical properties propellant; binder; nitramine-group-containing polymer; energetic polymer; mechanical properties
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MDPI and ACS Style

Hwang, K.; Mun, H.; Jung, J.Y.; Cho, H.L.; Kim, S.J.; Min, B.S.; Jeon, H.B.; Kim, W. Nitramine-Group-Containing Energetic Prepolymer: Synthesis, and Its Properties as a Binder for Propellant. Polymers 2019, 11, 1966.

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