A Study on the Effect of Additives on Temperature Sensitivityin Composite Propellants

Kulkarni, Vivek; Kulkarni, Ajit R.; Phawade, P. A.; Agrawal, J. P.

doi:10.1002/1521-4087(200106)26:3<125::aid-prep125>3.0.co;2-8

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…For HTPB propellant, the reduction of the burning rate is mainly achieved by adding the burning-rate depressant to inhibit the thermal decomposition of ammonium perchlorate (AP). , The most commonly used burning-rate depressants in HTPB propellants are inorganic salts, such as ammonium oxalate ((NH 4 ) 2 C 2 O 4 ), , calcium carbonate (CaCO 3 ), , and strontium carbonate (SrCO 3 ). , However, these burning-rate depressants do not contribute to the energy of the propellant, and it is necessary to use these additives in rather substantial quantities if the desired burning suppression is to be obtained, which will reduce the energy density and mechanical properties of the propellant. , Some of the literature reported that quaternary ammonium salts have a significant effect of reducing the burning rate, but these substances have poor compatibility with HTPB propellants, and a small amount of addition will cause adverse effects on the propellants.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 However, these burning-rate depressants do not contribute to the energy of the propellant, and it is necessary to use these additives in rather substantial quantities if the desired burning suppression is to be obtained, which will reduce the energy density and mechanical properties of the propellant. 18,19 Some of the literature reported that quaternary ammonium salts have a significant effect of reducing the burning rate, 20 but these substances have poor compatibility with HTPB propellants, and a small amount of addition will cause adverse effects on the propellants.…”

Section: Introductionmentioning

confidence: 99%

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Chemical Modification of Hydroxyl-Terminated Polybutadiene and Its Application in Composite Propellants

Zhang

Tan

Zhang³

et al. 2021

Ind. Eng. Chem. Res.

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In this article, hydroxyl-terminated polybutadiene (HTPB) was chemically transformed into multiamine, hydroxy polybutadiene (AEHTPB) by the adoption of appropriate synthesis strategies. The structure of AEHTPB was confirmed by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (NMR). The modification degree was altered by adjusting reaction conditions to find out the effect of structural change on various physical properties, including the viscosity and glass transition temperature (T g ) of AEHTPB. Adding AEHTPB to the HTPB binder system could improve the cross-link density and strength of the polyurethane elastomer. Meanwhile, the experiment results indicated that AEHTPB could inhibit the low-temperature decomposition of ammonium perchlorate (AP) by forming a dense coating on the surface of AP. Then, the propellant level studies were conducted with the use of AEHTPB/HTPB mixture as a binder. As a result, the burning rate of propellant containing AEHTPB (5 wt %) was found to be reduced by 10.8% compared to HTPB-based propellant, and the mechanical properties of the propellant were superior to those of HTPB-based propellant with an improvement of 46.2% in tensile strength and 35.1% enhancement in elongation at break. Finally, tensile testing and observation of fracture surface morphology further demonstrated that AEHTPB had a significant bonding effect on AP-based propellant.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical Modification of Hydroxyl-Terminated Polybutadiene and Its Application in Composite Propellants

Zhang

Tan

Zhang³

et al. 2021

Ind. Eng. Chem. Res.

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“…Factors that affect the burning rate of the propellants are pressure and temperature, and there has been much research on the effect of initial temperature on the burning rate of rocket propellants [1][2][3][4][5][6][7][8][9] but there does not seem to be such research related to air bag gas-generating agents.…”

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confidence: 99%

Effect of Initial Temperature and Pressure on the Burning Rate of AGAT/AN Mixtures

Miyata

Hasue

2011

Journal of Energetic Materials

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The combustion characteristics of aminoguanidinium 5,5 0 -azobis-1H-tetrazolate (AGAT)=ammonium nitrate (AN)-based gas generating agents were studied by using a temperature-controlled chimney-type strand burner. Controlling the initial temperature at 243, 298, or 343 K, the mass burning rates of AGAT=AN ¼ 50=50 were measured and the temperature sensitivities were deduced. The effects of CuO and MnO 2 on temperature sensitivity were studied. The temperature sensitivity equation as a function of pressure and initial temperature was also determined.

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Propellants

2010

High Energy Materials

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A Study on the Effect of Additives on Temperature Sensitivityin Composite Propellants

Cited by 9 publications

References 4 publications

Chemical Modification of Hydroxyl-Terminated Polybutadiene and Its Application in Composite Propellants

Chemical Modification of Hydroxyl-Terminated Polybutadiene and Its Application in Composite Propellants

Effect of Initial Temperature and Pressure on the Burning Rate of AGAT/AN Mixtures

Propellants

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