We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Different inhibition mechanisms and safety effects of TPU and EVA on thermal decomposition of RDX.
- Authors
An, Jing; Ju, Ronghui; Zeng, Jianyou; Luo, Yiming; Luo, Hao; Ma, Haixia
- Abstract
The combination of energetic materials (EMs) and binders into polymer-bonded explosives (PBX) is an important method for modifying explosives. To explore the effect of thermoplastic polyurethane (TPU) and ethylene–vinyl acetate copolymer (EVA) on pyrolysis and safety performance on EMs, the RDX-based PBXs were prepared by mechanical mixing method, direct method and microencapsulation method, respectively. Scanning electron microscope (SEM) and differential scanning calorimetry (DSC) were used to find out composites for the possibility of further application. The PBXs samples coated by TPU or EVA using the direct method with the maximal enthalpy of mixing were selected and characterized by X-ray powder diffraction (XRD) and transform infrared spectroscopy (FTIR). The thermal decomposition tests of RDX and the two prepared PBXs were further carried out by thermogravimetry/infrared/mass (TG/IR/MS). The impact sensitivity and laser ignition tests were also performed to determine the mechanical sensitivity effect and ignition influence of the two binders on RDX. The result indicated that TPU increased the activation energy of RDX and inhibited the subsequent pyrolysis process. EVA significantly increased the decomposition peak temperature, indicating that it can improve the initial thermal stability of EMs. Both TPU and EVA improve the ignition performance, but EVA reduces the impact sensitivity. Therefore, EVA exhibits better performance than TPU in RDX-based PBXs.
- Subjects
VINYL acetate; CYCLONITE; X-ray powder diffraction; SCANNING electron microscopes; DIFFERENTIAL scanning calorimetry; ETHYLENE-vinyl acetate
- Publication
Journal of Thermal Analysis & Calorimetry, 2022, Vol 147, Issue 20, p11261
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-022-11370-z