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Polarizable and nonpolarizable force fields for alkyl nitrates
Oleg Borodin1, Grant D Smith, Thomas D Sewell
1Wasatch Molecular Incorporated, 2141 East St. Mary's Drive, Salt Lake City, Utah 84108, USA. Oleg.Borodin@utah.edu
New atomic force fields, derived from quantum chemistry, accurately predict properties for alkyl nitrate liquids and PETN crystal. These computational models enhance understanding of material behavior.
Area of Science:
- Computational Chemistry
- Materials Science
- Condensed Matter Physics
Background:
- Accurate modeling of energetic materials like pentaerythritol tetranitrate (PETN) is crucial for safety and performance.
- Developing reliable force fields is essential for molecular simulations of complex chemical systems.
Purpose of the Study:
- To develop quantum-chemistry-based atomic force fields for alkyl nitrate liquids and PETN crystal.
- To validate the predictive capabilities of these force fields for thermophysical and mechanical properties.
Main Methods:
- Quantum chemistry calculations (MP2/aug-cc-pvDz) to derive parameters for polarizable and nonpolarizable force fields.
- Molecular dynamics simulations to test force fields on alkyl nitrate liquids and PETN crystal polymorphs.
Main Results:
- Developed and validated many-body polarizable and two-body nonpolarizable atomic force fields.
- Demonstrated accurate prediction of thermophysical and mechanical properties for the studied materials.
Conclusions:
- Quantum-chemistry-derived force fields provide a reliable method for simulating alkyl nitrates and PETN.
- These force fields enable accurate prediction of material properties, advancing computational materials science.
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