| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Preparation and Property of New Fluorocarbon Adhesive |
| YAO Qifa, DU Xiuxin, ZHANG Yanjie, XIA Min, LUO Yunjun
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| Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing 100081, China |
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Abstract The aluminum powder in the propellant can easily form a condensed phase with Al2O3 during the combustion process, which reduces the the specific impulse of propellant and the efficiency of nozzle, and aggravates the ablation of the nozzle. In order to improve the condensed agglomeration of aluminum powder during combustion, the researchers choose to introduce fluorine into the solid propellant. In this article, a fluorine-containing polyol was selected and added to two commonly used propellant adhesives (HTPE and PET). The mechanical properties of polyurethane film were significantly improved. The results of DSC and TG showed that the addition of fluorine-containing polyols did not have a large effect on the low temperature mechanical properties of the film, but showed different results for the thermal decomposition of the first stage. The introduction of the fluorine-containing polyol advanced the thermal decomposition of the first stage of the HTPE, but delayed the decomposition of the first stage of the PET polyurethane film. The laser ignition of the sample propellant and the surface element analysis of the flameout of the combustion sample showed that the introduction of the fluorine-containing polyol effectively improved the agglomeration of the condensed phase of the aluminum powder and increased the combustion efficiency.
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Published: 26 April 2020
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| Fund:This work was financially supported by the National Defense Science and Technology Key Laboratory Fund for Explosives and Combustion (6142603030504) and the Fundamental Research Funds for the Central Universities (3052017010). |
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Corresponding Authors:
Min Xia, an associate professor at the School of Mate-rials Science, Beijing Institute of Technology, and a master's tutor. He is mainly engaged in research work on energetic materials and solid propellants.
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| About author:: Qifa Yao, graduated from the School of Materials Scie-nce and Engineering of Zhengzhou University in 2016 with a bachelor's degree in engineering. He is currently a graduate student at Beijing Institute of Technology, under professor Min Xia. The main research direction is composite solid propellant. |
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2020, Vol. 34 
