Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Theory of the effect of external stress on the activated dynamics and transport of dilute penetrants in supercooled liquids and glasses

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/5.0056920· OSTI ID:1853677
 [1];  [2]
  1. University of Illinois at Urbana-Champaign, IL (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
  2. University of Illinois at Urbana-Champaign, IL (United States)
We generalize the self-consistent cooperative hopping theory for a dilute spherical penetrant or tracer activated dynamics in dense metastable hard sphere fluids and glasses to address the effect of external stress, the consequences of which are systematically established as a function of matrix packing fraction and penetrant-to-matrix size ratio. All relaxation processes speed up under stress, but the difference between the penetrant and matrix hopping (alpha relaxation) times decreases significantly with stress corresponding to less time scale decoupling. A dynamic crossover occurs at a critical “slaving onset” stress beyond which the matrix activated hopping relaxation time controls the penetrant hopping time. This characteristic stress increases (decreases) exponentially with packing fraction (size ratio) and can be well below the absolute yield stress of the matrix. Below the slaving onset, the penetrant hopping time is predicted to vary exponentially with stress, differing from the power law dependence of the pure matrix alpha time due to system-specificity of the stress-induced changes in the penetrant local cage and elastic barriers. An exponential growth of the penetrant alpha relaxation time with size ratio under stress is predicted, and at a fixed matrix packing fraction, the exponential relation between penetrant hopping time and stress for different size ratios can be collapsed onto a master curve. Direct connections between the short- and long-time activated penetrant dynamics and between the penetrant (or matrix) alpha relaxation time and matrix thermodynamic dimensionless compressibility are also predicted. The presented results should be testable in future experiments and simulations.
Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0020858
OSTI ID:
1853677
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 5 Vol. 155; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (65)

Diffusion in polymer—solvent systems. I. Reexamination of the free-volume theory journal March 1977
Application of free-volume theory to self diffusion of solvents in polymers below the glass transition temperature: A review journal September 2011
Colloid mobilization and transport in groundwater journal February 1996
Effects of chain stiffness and penetrant size on penetrant diffusion in simple polymers: deduced relations from simulation and PRISM theory journal May 2004
Energy-efficient polymeric gas separation membranes for a sustainable future: A review journal August 2013
Fundamental water and salt transport properties of polymeric materials journal January 2014
Source of non-Arrhenius average relaxation time in glass-forming liquids journal August 1998
Brownian motion in a field of force and the diffusion model of chemical reactions journal April 1940
Transport phenomena through polymeric systems journal August 2001
Physical models of diffusion for polymer solutions, gels and solids journal August 1999
Pushing the limits on possibilities for large scale gas separation: which strategies? journal August 2000
Viscosity and diffusion in hard-sphere-like colloidal suspensions journal March 1998
Thermodynamics–Structure–Dynamics Correlations and Nonuniversal Effects in the Elastically Collective Activated Hopping Theory of Glass-Forming Liquids journal July 2020
Microscopic Theory of Coupled Slow Activated Dynamics in Glass-Forming Binary Mixtures journal October 2017
Structure Dominates Localization of Tracers within Aging Nanoparticle Glasses journal March 2019
Diffusion Decoupling in Binary Colloidal Systems Observed with Contrast Variation Multispeckle Diffusing Wave Spectroscopy journal April 2019
Statistical Mechanical Theory of Penetrant Diffusion in Polymer Melts and Glasses journal July 2016
Nonuniversal Coupling of Cage Scale Hopping and Collective Elastic Distortion as the Origin of Dynamic Fragility Diversity in Glass-Forming Polymer Liquids journal December 2016
50th Anniversary Perspective : Polymers and Mixed Matrix Membranes for Gas and Vapor Separation: A Review and Prospective Opportunities journal October 2017
Selective Molecular Transport in Thermoresponsive Polymer Membranes: Role of Nanoscale Hydration and Fluctuations journal June 2018
Molecular Simulations of Solute Transport in Polymer Melts journal July 2017
How the Shape and Chemistry of Molecular Penetrants Control Responsive Hydrogel Permeability journal December 2020
Hopping of Water in a Glassy Polymer Studied via Transition Path Sampling and Likelihood Maximization journal March 2013
Mobility of Supercooled Liquid Toluene, Ethylbenzene, and Benzene near Their Glass Transition Temperatures Investigated Using Inert Gas Permeation journal May 2013
Unified Theory of Activated Relaxation in Liquids over 14 Decades in Time journal October 2013
Dynamical Theory of Segmental Relaxation and Emergent Elasticity in Supercooled Polymer Melts journal March 2015
Solute Diffusion within Hydrogels. Mechanisms and Models journal November 1998
Even Hard-Sphere Colloidal Suspensions Display Fickian Yet Non-Gaussian Diffusion journal March 2014
Polymers with autonomous life-cycle control journal December 2016
Anomalous dynamics of intruders in a crowded environment of mobile obstacles journal April 2016
Coarse-grained molecular dynamics simulation of activated penetrant transport in glassy polymers journal January 2018
Different scenarios of dynamic coupling in glassy colloidal mixtures journal January 2018
Size-dependent penetrant diffusion in polymer glasses journal January 2018
Activated penetrant dynamics in glass forming liquids: size effects, decoupling, slaving, collective elasticity and correlation with matrix compressibility journal January 2021
Interaction between surfaces with solvophobicity or solvophilicity immersed in solvent: Effects due to addition of solvophobic or solvophilic solute journal May 2003
Entropic barriers, activated hopping, and the glass transition in colloidal suspensions journal July 2003
Transport coefficients in glassy colloidal fluids journal July 2003
Derivation of a microscopic theory of barriers and activated hopping transport in glassy liquids and suspensions journal December 2005
Theory of gelation, vitrification, and activated barrier hopping in mixtures of hard and sticky spheres journal February 2008
Measuring diffusivity in supercooled liquid nanoscale films using inert gas permeation. II. Diffusion of Ar, Kr, Xe, and CH4 through Methanol journal November 2010
How do molecules move near T g ? Molecular rotation of six probes in o ‐terphenyl across 14 decades in time journal January 1995
Elastically cooperative activated barrier hopping theory of relaxation in viscous fluids. I. General formulation and application to hard sphere fluids journal May 2014
Elastically cooperative activated barrier hopping theory of relaxation in viscous fluids. II. Thermal liquids journal May 2014
Theory of activated penetrant diffusion in viscous fluids and colloidal suspensions journal October 2015
Assessment of the micro-structure and depletion potentials in two-dimensional binary mixtures of additive hard-disks
  • Perera-Burgos, Jorge Adrián; Méndez-Alcaraz, José Miguel; Pérez-Ángel, Gabriel
  • The Journal of Chemical Physics, Vol. 145, Issue 10 https://doi.org/10.1063/1.4962423
journal September 2016
Correlated matrix-fluctuation-mediated activated transport of dilute penetrants in glass-forming liquids and suspensions journal May 2017
Local structure, thermodynamics, and phase behavior of asymmetric particle mixtures: Comparison between integral equation theories and simulation journal June 2019
Tracer transport in attractive and repulsive supercooled liquids and glasses journal November 2019
Effect of size disparity on the structure and dynamics of the small component in concentrated binary colloidal mixtures journal October 2019
The role of collective elasticity on activated structural relaxation, yielding, and steady state flow in hard sphere fluids and colloidal suspensions under strong deformation journal November 2020
Ideal probe single-molecule experiments reveal the intrinsic dynamic heterogeneity of a supercooled liquid journal March 2015
Experimental test of a predicted dynamics–structure–thermodynamics connection in molecularly complex glass-forming liquids journal April 2021
Integral equations for classical fluids: II. Hard spheres again journal April 1981
Connections between some kinetic and equilibrium theories of the glass transition journal April 1987
Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids journal February 1996
Integral equation theory of thermodynamics, pair structure, and growing static length scale in metastable hard sphere and Weeks-Chandler-Andersen fluids journal April 2020
Viscosity of colloidal suspensions journal March 1997
Strain softening, yielding, and shear thinning in glassy colloidal suspensions journal February 2005
Glassy dynamics in asymmetric binary mixtures of hard spheres journal April 2019
Microscopic Theory of Softness in Supercooled Liquids journal May 2021
Reaction-rate theory: fifty years after Kramers journal April 1990
Colloquium : The glass transition and elastic models of glass-forming liquids journal September 2006
Self-Healing Polymers and Composites journal June 2010
Diffusion and Mass Transfer book March 2013
Stress-enhanced mobility and dynamic yielding in polymer glasses journal July 2007