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    • Toward a Better Understanding of Activation Volume and Dynamic Decoupling of Glass-Forming Liquids under Compression
    Authors: Anh D. Phan; Nguyen K. Ngan; Nam B. Le; Le T. M. Thanh;  Advisor: -;  Co-Author: - (2021)

    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. Rela...