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Machine learning prediction of thermal sensitivity for energetic materials based on multi-source feature fusion

Context Thermal sensitivity, typically characterized by the thermal decomposition temperature (T d ), is a key parameter that reflects the thermal stability and safety of energetic materials, providing essential guidance for their engineering applications, storage, and transportation. However, traditional experimental determination methods suffer from long cycles, high costs, and significant hazards, rendering them unsuitable for efficient, large‑scale material screening. To address this bottleneck, this study s…

By the Truvace desk2 min read1 sourcePeer-reviewedTRV-2026-1685· cite & verify
Machine learning prediction of thermal sensitivity for energetic materials based on multi-source feature fusion
Prediction of physicochemical properties of energetic materials for identification of treatment technologies for waste streams by United States. Army. Corps of Engineers; Engineer Research and Development Center (U.S.); Construction Engineering Research Laboratory (U.S.). Public domain

In brief

Researchers compared three ways of feeding data to machine learning models that estimate the thermal decomposition temperature of energetic materials: molecular topological features, features from first-principles calculations, and a fusion of the two. The fused set gave the best test-set accuracy, and a Random Forest model with SPXY sample partitioning performed best overall.

Thermal decomposition temperature is a key indicator of the safety and stability of energetic materials, yet measuring it experimentally is slow, expensive, and dangerous. A reliable predictive tool could help narrow candidates before lab work. What remains uncertain is how well the approach generalizes beyond the study's dataset, since the best model still carries an error of roughly 30 °C.

Main points

  1. Topological features alone in a Random Forest gave an R2 of 0.721, with RMSE of 39.844 °C and MAE of 29.502 °C.
  2. Calculated features alone performed considerably worse, with an R2 of 0.462 and an RMSE of 42.391 °C.
  3. Fused features reached a test-set R2 of 0.799, cutting RMSE to 31.585 °C and MAE to 24.443 °C.
  4. The improvement appeared across SVR, KRR, and AdaBoost as well as Random Forest.

The gain

Combining molecular topological features with first-principles calculated features raised test-set accuracy for predicting decomposition temperature, offering a computational alternative to slow, costly, hazardous experiments for screening energetic materials.

The rundown

The study frames thermal sensitivity, characterized by decomposition temperature, as guidance for engineering use, storage, and transportation of energetic materials. It notes that traditional experimental determination suffers from long cycles, high costs, and significant hazards, which makes large-scale screening impractical.

Among the four models tested, Random Forest combined with SPXY sample partitioning delivered the best overall predictive performance. The authors say the consistent gains across different model types confirm a complementarity between the two kinds of features.

On the methods side, the work used Python with RDKit for topological descriptors, crystal structures from the Cambridge Crystallographic Data Centre, and first-principles calculations with CASTEP and DMol3 using the PBE functional with dispersion corrections.

Sources

  1. Peer-reviewedJournal of Molecular Modeling2026-10-09

The debate