Catalysis of HMX Decomposition and Combustion

Пивкина, Алла Н.; Muravyev, Nikita V.; Моногаров, Константин А.; Fomenkov, Igor V.; Schoonman, J.

doi:10.1016/b978-0-12-802710-3.00009-x

Cited by 17 publications

(7 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, in the recent studies [30,31] the optimal level of multiwall carbon nanotubes additive was found to be about 1 wt.%, whereas at higher loadings the combustion is depressed. Nano-sized metal oxides render the catalytic action in diverse processes, including the decomposition and combustion of energetic materials [32,33,34]. Specifically, nano-Fe 2 O 3 has been found to catalyze the decomposition of NC, with the governing effect of the contact surface between two components [35].…”

Section: Introductionmentioning

confidence: 99%

Supercritical Antisolvent Processing of Nitrocellulose: Downscaling to Nanosize, Reducing Friction Sensitivity and Introducing Burning Rate Catalyst

et al. 2019

View full text Add to dashboard Cite

A supercritical antisolvent process has been applied to obtain the nitrocellulose nanoparticles with an average size of 190 nm from the nitrocellulose fibers of 20 μm in diameter. Compared to the micron-sized powder, nano-nitrocellulose is characterized with a slightly lower decomposition onset, however, the friction sensitivity has been improved substantially along with the burning rate increasing from 3.8 to 4.7 mm·s−1 at 2 MPa. Also, the proposed approach allows the production of stable nitrocellulose composites. Thus, the addition of 1 wt.% carbon nanotubes further improves the sensitivity of the nano-nitrocellulose up to the friction-insensitive level. Moreover, the simultaneous introduction of carbon nanotubes and nanosized iron oxide catalyzes the combustion process evidenced by a high-speed filming and resulting in the 20% burning rate increasing at 12 MPa. The presented approach to the processing of energetic nanomaterials based on the supercritical fluid technology opens the way to the production of nitrocellulose-based nanopowders with improved performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Supercritical Antisolvent Processing of Nitrocellulose: Downscaling to Nanosize, Reducing Friction Sensitivity and Introducing Burning Rate Catalyst

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Modern solid propellants are based on active polyvinyltetrazole binders and powerful explosives that contain cyclic nitramines RDX, HMX, and CL-20 [1][2][3]. A control of their ballistics is a typical issue for such propellants [4][5] as well as an increase of their burning rate [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Burning Characteristics of the HMX/CL‐20/AP/Polyvinyltetrazole Binder/Al Solid Propellants Loaded with Nanometals

Sergienko

Popenko

Slyusarsky

et al. 2018

Propellants Explo Pyrotec

View full text Add to dashboard Cite

The paper investigated the effect of metal nanopowders additive on the combustion properties of HMX/CL‐20/AP/polyvinyltetrazole binder/Al propellants. Using thermal analysis, the authors described the effect of aluminum, boron, zinc, nickel, copper, and molybdenum and identified the combustion in a pressure range from 4 to 10 MPa with a pressure step of 1 MPa. No significant correlation between the oxidation properties of the n‐Me powders and the combustion properties of propellants was discovered. An addition of nanopowders caused an increase in the propellant burning rate by approximately 30 % for n‐Al, n‐B, n‐Ni, and n‐Mo independent from the pressure values. An addition of n‐Cu resulted in a burning rate increase by a factor of 4.9 due to coppers’ probable catalytic activity during interaction with nitroesters and cyclic nitramines in a solid phase. n‐Zn additive increased the propellant burning rate by factors 2.3 and 3.6 at 4 and 10 MPa, respectively, due to catalytic activity of zinc in a gaseous phase.

show abstract

“…M H −M L increased with the addition of TiO 2 indicating a higher crosslink density caused by TiO 2 due to strong filler–rubber interactions: the physical interactions between polar -C≡N groups in NBR and –OH groups on TiO 2 surfaces. These surface hydroxyl groups, both of terminal OH and bridge OH, were generated by the reaction of surface oxide with moisture in the air [ 38 , 39 ]. The proposed physical interaction in TiO 2 -filled NBR composites is shown in Scheme 1 .…”

Section: Resultsmentioning

confidence: 99%

High Performance of Titanium Dioxide Reinforced Acrylonitrile Butadiene Rubber Composites

2022

View full text Add to dashboard Cite

Recently, dielectric elastomer actuators (DEA) have emerged as one of the most promising materials for use in soft robots. However, DEA needs a high operating voltage and high mechanical properties. By increasing the dielectric constant of elastomeric materials, it is possible to decrease the operating voltage required. Thus, elastomeric composites with a high dielectric constant and strong mechanical properties are of interest. The aim of this research was to investigate the effect of titanium dioxide (TiO2) content ranging from 0 to 110 phr on the cure characteristics, and physical, dielectric, dynamic mechanical, and morphological properties of acrylonitrile butadiene rubber (NBR) composites. The addition of TiO2 reduced the scorch time (ts1) as well as the optimum cure time (tc90) but increased the cure rate index (CRI), minimum torque (ML), maximum torque (MH), and delta torque (MH − ML). The optimal TiO2 content for maximum tensile strength and elongation at break was 90 phr. Tensile strength and elongation at break were increased by 144.8% and 40.1%, respectively, over pure NBR. A significant mechanical property improvement was observed for TiO2-filled composites due to the good dispersion of TiO2 in the NBR matrix, which was confirmed by scanning electron microscopy (SEM). Moreover, incorporating TiO2 filler gave a higher storage modulus, a shift in glass transition temperature (Tg) to a higher temperature, and reduced damping in dynamic mechanical thermal analysis (DMTA). The addition of TiO2 to NBR rubber increased the dielectric constant of the resultant composites in the tested frequency range from 102 to 105 Hz. As a result, TiO2-filled NBR composite has a high potential for dielectric elastomer actuator applications.

show abstract

Catalysis of HMX Decomposition and Combustion

Cited by 17 publications

References 36 publications

Supercritical Antisolvent Processing of Nitrocellulose: Downscaling to Nanosize, Reducing Friction Sensitivity and Introducing Burning Rate Catalyst

Supercritical Antisolvent Processing of Nitrocellulose: Downscaling to Nanosize, Reducing Friction Sensitivity and Introducing Burning Rate Catalyst

Burning Characteristics of the HMX/CL‐20/AP/Polyvinyltetrazole Binder/Al Solid Propellants Loaded with Nanometals

High Performance of Titanium Dioxide Reinforced Acrylonitrile Butadiene Rubber Composites

Contact Info

Product

Resources

About