论文标题
理论和实验研究对压缩对玻璃形成液体结构松弛的影响
Theoretical and Experimental Study of Compression Effects on Structural Relaxation of Glass-Forming Liquids
论文作者
论文摘要
我们开发了弹性集体的非线性兰格文文方程理论的玻璃形成液体的大量松弛理论，以研究压缩条件下的分子迁移率。施加的压力限制了更多的分子运动，因此在增加压力时会显着减速分子动力学。我们定量确定结构放松时间的温度和压力依赖性。为了验证我们的模型，在环境压力和升高的压力下进行了三个刚性和非聚合物超分子的介电光谱实验。数值结果定量与实验数据一致。
We develop the elastically collective nonlinear Langevin equation theory of bulk relaxation of glass-forming liquids to investigate molecular mobility under compression conditions. The applied pressure restricts more molecular motion and therefore significantly slows-down the molecular dynamics when increasing the pressure. We quantitatively determine the temperature and pressure dependence of the structural relaxation time. To validate our model, dielectric spectroscopy experiments for three rigid and non-polymeric supramolecules are carried out at ambient and elevated pressures. The numerical results quantitatively agree with experimental data.
