Prediction of the Density of Energetic Materials on the Basis of their Molecular Structures

Abstract

Abstract:The density of an energetic compound is an essential parameter for the assessment of its performance. A simple method based on quantitative structureproperty relationship (QSPR) has been developed to give an accurate prediction of the crystal density of more than 170 polynitroarenes, polynitroheteroarenes, nitroaliphatics, nitrate esters and nitramines as important classes of energetic compounds, by suitable molecular descriptors. The evaluation techniques included cross-validation, validation through an external test set, and Y-randomization for multiple linear regression (MLR) and training state analysis for artificial neural network (ANN), and were used to illustrate the accuracy of the proposed models. The predicted MLR results are close to the experimental data for both the training and the test molecular sets, and for all of the molecular sets, but not as close as the ANN results. The ANN model was also used with 20 hidden neurons that gave good result. The results showed high quality for nonlinear modelling according to the squared regression coefficients for all of the training, validation and the test sets (R 2 = 0.999, 0.914 and 0.931, respectively). The calculated results have also been compared with those from several of the best available predictive methods, and were found to give more reliable estimates.

Assessment of Recent Researches for Reliable Prediction of Density of Organic Compounds as well as Ionic Liquids and Salts Containing Energetic Groups at Room Temperature

“…Rahimi et al. [15] used ANN and MLR models with five complex molecular descriptors for prediction of the density of 172 polynitroarenes, polynitroheteroarenes, nitroaliphatics, nitrate esters and nitramines at room temperature. It was found that the ANN model can give a more reliable prediction as compared to the MLR model.…”

Prediction of the Density of Energetic Co-crystals: a Way to Design High Performance Energetic Materials

“…They have also found a simple method for calculating the detonation pressure of ideal and non-ideal explosives [30]. Rahimi et al [31] have estimated the densities of energetic materials on the basis of their molecular structures.…”

Simple correlations for calculating NHTPB enthalpy of formation through molecular structures

“…In QSPR, a relation will be found between property and basic molecular properties using advanced mathematic methods such as genetic algorithm and neural network. Basic molecular properties obtained from the chemical structure of compounds are called "molecular descriptors" (Rahimi et al, 2016).…”