Journal
ACS OMEGA
Volume 4, Issue 10, Pages 14261-14271Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.9b01909
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Funding
- Weapon Equipment Pre-Research Fund of China [6140656020201]
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In this work, novel three-dimensional nitrocellulose/glycidyl azide polymer/submicron-2,2', 4,4', 6,6'-hexanitro-stilbene (NC/GAP/submicron-HNS) composite fibers were prepared by the electrospinning method. As-prepared NC/GAP/submicron-HNS fibers were continuous and possessed a large specific surface area. The structure of fibers was characterized by energy-dispersive X-ray, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy (IR). The results showed that HNS submicron particles were uniformly loaded on the surface of NC/GAP fibers and incorporated with it. Thermal analyses were performed. Such NC/GAP/submicron-HNS fibers showed a low activation energy of 204 kJ.mol(-)(1) and large rate constant of 1.74 s(-1), indicating high reactivity and fast reaction rate. The result of TG-IR analysis revealed that the main decomposition products of NC/GAP/submicron-HNS were CO2, CO, H2O, N2O, few NO, and fragments such as -CH2O- and -CH-, which were low-signature gases. An evaluation on the energy performance disclosed that the standard specific impulse (I-sp) of NC/GAP/submicron-HNS fibers was 2032 N.s.kg(-1), which was higher than 2014 N.s.kg(-1) of NC/GAP. This meant the addition of HNS submicron particles to the NC/GAP fiber was favorable to the improvement of energy performance. Additionally, introduction of submicron-HNS made the energetic fibers becoming very insensitive to impact action. It was expected that as-prepared NC/GAP/submicron-HNS membranes were promising materials applied for solid rocket propellant.
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