Adhesive properties of some fluoropolymer binders with the insensitive explosive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)

Yeager, John D.; Dattelbaum, Andrew M.; Orler, E. Bruce; Bahr, David F.; Dattelbaum, Dana M.

doi:10.1016/j.jcis.2010.08.063

Cited by 68 publications

(27 citation statements)

References 31 publications

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“…The FGAP‐based polyurethane networks gave a tensile strength of 1.5 MPa and an elongation at break of 81.6%, which represent better mechanical properties compared to pure GAP‐based polyurethane networks (tensile strength of 0.66 MPa and elongation at break of 51.1%). This may be attributable to the flexibility of main chains of FGAP being improved via copolymerization resulting in a better intermolecular reaction and mechanical behaviors of polymeric binders . Therefore, it is suggested that the synthesis of a flexible structural FGAP in the binder formulation of solid propellants can be one of the most promising solutions for overcoming the poor mechanical properties of GAP‐based solid propellants.…”

Section: Resultsmentioning

confidence: 99%

Structure and mechanical properties of fluorine-containing glycidyl azide polymer-based energetic binders

Xu¹,

Ge²,

Lu³

et al. 2017

Polym. Int.

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A novel energetic polymer, fluorine‐containing glycidyl azide polymer (FGAP), was developed via an initial cationic copolymerization of epichlorohydrin and 1,1,1‐trifluoro‐2,3‐epoxypropane, followed by azidation. The structure of FGAP was confirmed using Fourier transform infrared, 1H NMR and 13C NMR spectroscopies. The molecular weight and the thermal behavior of FGAP were characterized using gel permeation chromatography, differential scanning calorimetry and thermogravimetric analysis. FGAP had a molecular weight of 2845 g mol−1, and the glass transition temperature and decomposition temperature were found to be −47.8 and 253 °C, respectively. FGAP‐based polyurethane networks were further prepared using triphenylmethane‐4,4,4‐triisocyanate as the crosslinking agent. In comparison with GAP, FGAP‐based polyurethane networks exhibited better mechanical behaviors (a tensile strength of 1.5 MPa and an elongation at break of 81.6%). The results demonstrated that FGAP might be a promising polymeric binder for future propellant formulations. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Structure and mechanical properties of fluorine-containing glycidyl azide polymer-based energetic binders

Xu¹,

Ge²,

Lu³

et al. 2017

Polym. Int.

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“…Different kinds of energetic crystals, polymer binders, and their distribution cause changes in the mechanical behavior of PBX materials. [5][6][7][8][9] Therefore, determining how these factors affect the macro-mechanical behavior of PBX is important. 10,11 Generally, polymer-based materials have non-linear mechanical properties which are highly temperature dependent.…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and strain rate on the dynamic responses of three polymer-bonded explosives

Qin

et al. 2011

The Journal of Strain Analysis for Engineering Design

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Polymer-bonded explosives (PBXs) are typical particulate composites of energetic crystals in a polymer matrix, which have a volume fraction of 60% to 95%. They are engineered to provide reliable performance and maximum safety envelopes through reduction of their sensitivity. There are three kinds of polymer-bonded explosive materials; namely, PBX1, PBX2, and PBX3. The last two polymer-bonded explosives were recently invented, in search of the more insensitive polymer-bonded explosive but with high detonation energy also. To investigate the dynamic response of new materials, the uniaxial compressive stress-strain behavior of the three polymer-bonded explosives was investigated as a function of temperature and strain rate. Constant and non-constant strain rate loading experiments were conducted in the use of pulse shapers. By comparing two different loads, the strain rate effect of these materials was found to depend on the instantaneous strain rate. The variations in failure stress, and failure strain with temperature, strain rate, and material composition were examined. The dependence of compressive strength on temperature and strain rate can be attributed to the Young's modulus and fracture surface energy according to Griffith criteria for fracture. The axial splitting caused by brittle fracture for most conditions was also investigated. Another failure mode of PBX2 agreed with the Mohr's failure mode criterion. All results show that PBX2 has more stable mechanical behavior and higher detonation performance.

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“…It is known that GAP based polymeric binder possesses inferior mechanical properties owing to its plenty of azide groups graed on the polymer backbone resulting in bad polymer backbone exibility and poor intermolecular interaction. 37,38 In this study, compared with pure GAP, poly(TFEE-r-GA) which prepared from copolymerization had better exibility of main chains resulting in better intermolecular interaction of polymer. Thus, the poly(TFEE-r-GA) based copolyurethane networks exhibited the improvement of mechanical behaviors.…”

Section: Mechanical Properties Of Copolyurethane Networkmentioning

confidence: 87%

Fluorinated glycidyl azide polymers as potential energetic binders

et al. 2017

RSC Adv.

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To improve the mechanical properties of glycidyl azide polymer (GAP)-based polyurethane network binders, a novel fluorinated glycidyl azide polymer, (2,2,2-trifluoro-ethoxymethyl epoxy-r-glycidyl azide) copolymer (poly(TFEE-r-GA)) was synthesized through an initial cationic copolymerization of epichlorohydrin and 2,2,2-trifluoro-ethoxymethyl epoxy, followed by azidation. The structure of poly(TFEE-r-GA) was characterized by FTIR, 1 H NMR, 13C NMR and GPC. DSC and TGA were used to investigate the thermal behavior of poly(TFEE-r-GA), the glass transition temperature and decomposition temperature of poly(TFEE-r-GA) were found to be À49.5 and 250 C, respectively. The copolyurethane networks were further synthesized by cross-linking poly(TFEE-r-GA) using trimethylolpropane as a chain extender agent, using isophorone diisocyanate as a cross-linking agent. In comparison with GAP, the poly(TFEE-r-GA) based copolyurethane networks exhibited relatively better mechanical properties, which had a tensile strength of 5.52 MPa, and an elongation at break of 162.8%. All the results indicated that the fluorine-containing GAP might serve as a potential energetic binder for future propellant formulations.

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Adhesive properties of some fluoropolymer binders with the insensitive explosive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)

Cited by 68 publications

References 31 publications

Structure and mechanical properties of fluorine-containing glycidyl azide polymer-based energetic binders

Structure and mechanical properties of fluorine-containing glycidyl azide polymer-based energetic binders

Effects of temperature and strain rate on the dynamic responses of three polymer-bonded explosives

Fluorinated glycidyl azide polymers as potential energetic binders

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