The Effects of Aniline Stabilizers on Nitrocellulose Based on Isothermal Thermal Decomposition

Abstract

The effects of various aniline stabilizers on the thermal stability of nitrocellulose (NC) were investigated via isothermal thermal decomposition dynamics. The pressuretime curves of NC/stabilizer composites were found to have a distinct inflection point, which was not observed on the pressure-time curves of NC. The effects of stabilizers on the isothermal thermal decomposition kinetics of NC were evaluated using Arrhenius equation and model-fitting method, and the effect of stabilizers on the storage time of NC was estimated using Berthelot equation. Results showed that the activation energy of NC/MNA, NC/ENA, NC/i-PNA, and NC/n-BNA before the inflection point were 162.9, 153.3, 147.4, and 150.6 kJ mol À 1 , respectively, which were significantly increased compared with that of pure NC (144.7 kJ mol À 1 ). Furthermore, the time required for the decomposition extent of NC/MNA, NC/ENA, NC/i-PNA, and NC/n-BNA to reach 0.1 % were 24.9, 11.2, 16.7, and 11.2 years, respectively, at 298.15 K, which was longer than that required of NC (10.6 years). UV-vis revealed that the stabilizers were almost consumed when the NC/stabilizer thermal decomposition pressure-time curve reached the inflection point. Based on the above results, the stability order was MNA > i-PNA > ENA > n-BNA as the criterion for time of the inflection point.

Insight into the stability and thermal decomposition behavior of nitrocellulose supplemented with different types of zeolites

“…All the stabilizing agents used in the current work provided activation energies greater than 150 kJ mol −1 , indicating their effectiveness as stabilizers for nitrocellulose (NC). This conclusion is consistent with the other findings presented above, further supporting the overall effectiveness of these substances as NC stabilizers [25, 33, 34].…”

Probing the Effects of Deuteration on the Structure and Thermal Behavior of TNT‐d5

“…FTIR transmission Spectra were taken via a Bruker Optics TENSOR 27 FTIR spectrometer in the range of 400–3500 cm −1 with a resolution of 2 cm −1 . The isothermal decomposition experiments were performed via a self‐modified dynamic vacuum stability test (DVST) instrument [15, 16] at different temperatures (200, 205, 210, 215, and 220 °C). The DVST instrument includes a heating furnace, reaction device, evacuation device, and data collection unit.…”

Stability and hazard properties of improvised nitrocellulose

“…This uncontrolled reaction ultimately can cause autoignition of propellants or NC stockpiles. This autocatalytic reaction is stopped by adding stabilizer such as secondary aromatic amines such as DPA, 2-NDPA or urea derivative such as ethyl centralite, methyl centralite etc, in the propellants (Luo et al 2020). Although a great details of stability of commercial grade and military grade NC have been well investigated (Trache and Tachoun 2018), no stability and hazard data of improvised NC are available in the literature.…”