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In this work, three samples of fluoroelastomers/glycidyl azide polymer/hexanitrohexaazaisowurtzitane (F 2602 /GAP/CL-20) energetic fibers with F 2602 /GAP:CL-20 ratios of 1:9, 2:8, and 3:7 were prepared by the electrospinning method. The morphologies and structures of the samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The results revealed that F 2602 /GAP/CL-20 energetic fibers showed a three-dimensional network structure, and four elements C, N, O, and F were observed on the surface. The surface of the fiber F 2602 /GAP:CL-20 = 1:9 was uniform and smooth. Differential scanning calorimetry was used to analyze the thermal decomposition properties of the samples. The apparent activation energy of the F 2602 /GAP/CL-20 energetic fiber was 399.86 kJ/mol, indicating high thermal stability. TG-MS analysis results show that the thermal decomposition products of F 2602 /GAP/CL-20 are mainly C 2 H 6 , H 2 O, N 2, and CO 2 . The results of the energy performance evaluation showed that the standard specific impulse ( I  sp ) of F 2602 /GAP/CL-20 was 2668.1 N s kg -1 , which was remarkably higher than I  sp of the state-of-the-art AP/HTPB/Al propellant. In addition, compared to that of CL-20, the friction sensitivity of one F 2602 /GAP/CL-20 sample decreased by 38%, and the sensitivities of the other two F 2602 /GAP/CL-20 samples were even less than zero. F 2602 /GAP/CL-20 fibers also exhibited a higher feature height. Therefore, these kinds of CL-20-based fibers are high-energy materials with very low sensitivity.

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Characterization and Properties of F<sub>2602</sub>/GAP/CL-20 Energetic Fibers with High Energy and Low Sensitivity Prepared by the Electrospinning Method

Characterization and Properties of F2602/GAP/CL-20 Energetic Fibers with High Energy and Low Sensitivity Prepared by the Electrospinning Method

Characterization and Properties of F₂₆₀₂/GAP/CL-20 Energetic Fibers with High Energy and Low Sensitivity Prepared by the Electrospinning Method