Physical properties of the pressure-induced activation volume and dynamic decoupling of ternidazole, glycerol, and probucol by the elastically collective nonlinear Langevin equation theory is theoretically investigated. Based on the predicted temperature dependence of activated relaxation under various compressions, the activation volume is determined to characterize effects of pressure on molecular dynamics of materials. It is found that the decoupling of the structural relaxation time of compressed systems from their bulk uncompressed value is governed by the power-law rule. The decoupling exponent exponentially grows with pressure below 2 GPa. The decoupling exponent and activation volume are intercorrelated and have a connection with the differential activation free energy. Relationships among these quantities are analyzed numerically and mathematically to explain many results in previous experiments and simulations.

中文翻译：

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更好地理解压缩下玻璃形成液体的活化体积和动态解耦

通过弹性集体非线性朗之万方程理论研究了压力诱导的活化体积和替硝唑、甘油和普罗布考的动态解耦的物理性质。基于在各种压缩下激活松弛的预测温度依赖性，确定激活体积以表征压力对材料分子动力学的影响。发现压缩系统的结构弛豫时间与其体积未压缩值的解耦受幂律规则的约束。解耦指数随着压力低于 2 GPa 呈指数增长。解耦指数和激活体积相互关联，并与微分激活自由能有关。