Thermal analysis of liquid and solid propellants

Tompa, Albert S.

doi:10.1016/0304-3894(80)80026-4

Cited by 19 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The activation energies showed an increasing trend from NMBHC to NMyBHC and DNTMBHC. The activation energies of evaporation of NMBHC, NMyBHC, and DNTMBHC (58.8, 69.2, and 74.5 kJ mol À1 , respectively) were similar to those of trinitroa- zetidine (81 kJ mol À1 ) [52] and nitroglycerine (57.8-80.3 kJ mol À1 ), [53] which are similar energetic materials. The pre-exponential factors of these compounds, although similar to that of nitroglycerin, were several orders of magnitudes smaller than that of trinitroazetidine.…”

Section: Thementioning

confidence: 67%

Nitro‐Substituted Bishomocubanes: Synthesis, Characterization, and Application as Energetic Materials

Lal

Rajkumar

Tare

et al. 2014

Chemistry An Asian Journal

View full text Add to dashboard Cite

Several high-energy-density strained polycyclic compounds nitromethyl-l,3-bishomocubane (NMBHC), nitromethylene-1,3-bishomocubane (NMyBHC), and bis(nitromethyl)-1,3-bishomocubane (DNTMBHC), which were synthesized for the first time from bishomocubanone, hold potential for application as standalone fuels in liquid bipropellant systems or as additives in liquid and solid propellant formulations. DFT analysis at the B3LYP/6-31G(d) level of theory was employed to optimize the geometries of the compounds and to determine their densities, heats of formation, and various thermodynamic properties. The density specific impulse, determined by using equilibrium thermodynamics, demonstrated an improvement of 75 s for NMBHC and NMyBHC over standard hydrocarbons. The specific impulse with ammonium perchlorate showed an improvement of 25-30 s over hydroxy-terminated polybutadiene. Thermogravimetric analysis revealed that NMBHC, NMyBHC, and DNTMBHC evaporated readily with activation energies of 58.8, 69.2, and 74.5 kJ mol(-1), respectively.

show abstract

Section: Thementioning

confidence: 67%

Nitro‐Substituted Bishomocubanes: Synthesis, Characterization, and Application as Energetic Materials

Lal

Rajkumar

Tare

et al. 2014

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…In view of the early stage evaporation of NG in thin piece samples has been proved agree with zero order model, the curve of dα/dt vs. α could be described by the basic kinetic equation as Equation (2) dadt=ksans-serifνapnormalf(a), where k vap is the evaporation rate constant, and f(α) is the function which describes the dependence of the differential conversion on conversion. In the case of plasticizer evaporation from double base propellant, f(α) could be simplified as (1 − α) n meaning Equation (3) [22,31,37]:dadt=ksans-serifνap(1−sans-serifα)n,…”

Section: Resultsmentioning

confidence: 99%

A Facile Way to Prolong Service Life of Double Base Propellant

Sun

Zhao

et al. 2018

Materials

View full text Add to dashboard Cite

The safe storage time for double base propellant (DBP or DB propellant) with stabilizers could usually be calculated to be greater than 40 years. However, the actual service life is far below that, which is largely caused by the decline of propellant mechanical performance. In this work polytetrafluoroethylene (PTFE) was introduced into the double base propellant formula as an additive. The tensile properties of this propellant before and after artificial aging were determined. The evaporation and diffusion characteristics of nitroglycerin (NG) in propellant were evaluated by thermogravimetry analysis (TGA). The results showed that mechanical properties of propellant were improved due to PTFE, especially for elongation at −40 °C, which was greatly increased by 115%. Moreover, the results of TGA showed that NG migration was reduced due to PTFE, which delayed the decline of propellant mechanical performance during aging. The reduction in elongation at −40 °C caused by aging was decreased by 68.5% for PTFE modified DBP. Enhanced mechanical properties and reduced NG migration could potentially prolong propellant service life.

show abstract

“…The decrease of the muzzle velocity of the laborated series of ammunition is noticed even in initial polygon testing, if the ammunition was stored for more than 6 months [3]. Based on experience and knowledge in the field, it is supposed that the first cause of this is the loss of ammunition mass induced by the evaporation of nitroglycerine and the degradation of nitrocellulose [8,9].…”

Section: Degradation Of Ballistic Characteristics Of Mortar Ammunitionmentioning

confidence: 99%

The influence of migration processes in gunpowder charge on the quality of mortar ammunition

Bobić¹,

Simonović²,

Drmanić³

et al. 2017

Hem Ind

View full text Add to dashboard Cite

The study describes the results of static, physicochemical and ballistic examination of double-based gunpowder charges, in order to establish the deviations from the demanded quality of mortar ammunition. The examinations were carried out on gunpowder samples used for laboration of mortar shells 60, 82 and 120 mm caliber and consisted of periodical measurements of the gunpowder mass loss, basic ballistic parameters, and compatibility testing of gunpowder and celluloid containers as well as chemical stability determination. The estimation of the gunpowder quality was performed by comparative analysis and the suggestions for more efficient production of it were given. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 172013]

show abstract

Thermal analysis of liquid and solid propellants

Cited by 19 publications

References 13 publications

Nitro‐Substituted Bishomocubanes: Synthesis, Characterization, and Application as Energetic Materials

Nitro‐Substituted Bishomocubanes: Synthesis, Characterization, and Application as Energetic Materials

A Facile Way to Prolong Service Life of Double Base Propellant

The influence of migration processes in gunpowder charge on the quality of mortar ammunition

Contact Info

Product

Resources

About