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Interactions and physical properties of energetic poly-(phthalazinone ether sulfone ketones) (PPESKs) and ε-hexanitrohexaazaisowurtzitane (ε-CL-20) based polymer bonded explosives: a molecular dynamics simulations

  • Yao Shu
  • Shaowen ZhangEmail author
  • Yuanjie ShuEmail author
  • Ning Liu
  • Yong Yi
  • Jichuan Huo
  • Xiaoyong Ding
Original Research
  • 30 Downloads

Abstract

Molecular dynamic (MD) simulations were employed to investigate the hexanitrohexaazaisowurtzitane (CL-20) crystal, seven designed energetic poly-(phthalazinone ether sulfone ketones) (PPESKs) and PPESKs/ε-CL-20 polymer–bonded explosives (PBXs). Cohesive energy density (CED) and solubility parameters (δ) were predicted for PBXs, the results indicated that stability of PBXs are related to their cohesive energy density (CED). Mechanical properties of seven polymer-bonded explosives (PPESKs/ε-CL-20) were found improved in comparison with that of ε-CL-20 by adding polymer binders. Young’s modulus (E), Shear modulus (G), and Bulk modulus (K) declined compare with ε-CL-20. K/G ratio and Cauchy pressure C12-C44 of PBXs indicate that they have certain ductility. Radial distribution function (RDF) was utilized for analyzing the interactions between PPESKs and ε-CL-20, and results demonstrate that hydrogen bond and van der Waals interactions exist between polymers and ε-CL-20. The calculated oxygen balance of polymer-bonded explosives (PBXs) is lower than that of pure ε-CL-20 by nearly about − 24%. Detonation properties of the polymer-bonded explosives (PBXs) were predicted based on ε-CL-20 values. Detonation velocity (D) for these PBXs was predicted almost at about 8300 m s−1, and the detonation pressure (P) for these PBXs was all predicted nearly at 38 GPa.

Keywords

ε-CL-20 PPESK PBXs Molecular dynamics Binding energy Mechanical property 

Notes

Funding information

Authors appreciate the financial support from the National Natural Science Foundation of China (grant nos. 21673018 and 21703168), Science and Technology Program of Guangzhou (2016201604030043, China), and Sichuan University of Science and Engineering (2017RCL44).

Compliance with ethical standards

Conflicts of interest

The authors declare that they have no conflict of interest.

Supplementary material

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ESM 1 (DOCX 2503 kb)
11224_2018_1225_MOESM2_ESM.zip (7.2 mb)
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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijingChina
  2. 2.Xi’an Modern Chemistry Research InstituteXi’anChina
  3. 3.Southwest University of Science and TechnologyMianyangChina
  4. 4.Sichuan University of Science and EngineeringZigongChina

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