Novel group quantitative structure-property relationship (QSPR) models on the thermodynamic properties of PBXTHs were presented, by the multiple linear regression (MLR) analysis method. Four thermodynamic properties were studied: the entropy (S-theta), the standard enthalpy of formation (Delta H-f(theta)), the standard Gibbs energy of formation (Delta(f)G(theta)), and the relative standard Gibbs energy of formation (Delta(R)G(theta)). The results by the formula indicate that the calculated and predicted data in this study are in good agreement with those in literature and the deviation is with...