2020/04/23 by Anh D. Phan, Phan, Anh D., Agnieszka Jędrzejowska +5
Materials Science · Physics and Astronomy · #Applied Physics (physics.app-ph) #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Glass properties and applications #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Optical properties and cooling technologies in crystalline materials #Soft Condensed Matter (cond-mat.soft) #Statistical Mechanics (cond-mat.stat-mech)
paper · pdf · doi:10.48550/arxiv.2004.10938
openalex publication_date 2020/04/23 · openalex created_date 2020/05/01 · openalex updated_date 2026/07/28
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.