84 citations · 527 across the 27 of their papers we have counts for
27 papers
String Model Predicts Relaxation in Sheared Glass-Forming Liquids
Zi-Long Wang, Qi-Lu Yuan, Yun-Jiang Wang +4
Understanding how structural relaxation evolves from equilibrium to nonequilibrium conditions remains a central problem in glass physics. Using simulations of model glass formers u…
Tunable Cooperative Motion, Rigidity, and Glassy Dynamics in Knotted Ring Polymer Melts
Yue-Tong Dong, Jack F. Douglas, Wen-Sheng Xu
We present a molecular dynamics study of the influence of knot complexity and molecular mass on glass formation upon cooling in knotted ring polymer melts. We find that cooperative…
Generalized Entropy Theory Investigation of the Relatively High Segmental Fragility of Many Glass-Forming Polymers
Xiaolei Xu, Jack F. Douglas, Wen-Sheng Xu
We utilize the generalized entropy theory (GET) of glass formation to address one of the most singular and least understood properties of polymer glass-forming liquids in compariso…
Atomistic mechanisms of dynamics in a two-dimensional dodecagonal quasicrystal
Kun Zhao, Matteo Baggioli, Wen-Sheng Xu +2
Quasicrystals have been observed in a variety of materials ranging from metal alloys to block copolymers. However, their structural and dynamical properties cannot be readily descr…
Parallel Emergence of Rigidity and Collective Motion in a Family of Simulated Glass-Forming Polymer Fluids
Xiaolei Xu, Jack F. Douglas, Wen-Sheng Xu
The emergence of the solid state in glass-forming materials upon cooling is accompanied by changes in both thermodynamic and viscoelastic properties and by a precipitous drop in fl…
Thermodynamic-Dynamic Interrelations in Glass-Forming Polymer Fluids
Xiaolei Xu, Jack F. Douglas, Wen-Sheng Xu
We utilize the lattice cluster theory (LCT) of polymer fluids to show that the configurational entropy, enthalpy, and internal energy are all closely interrelated, as suggested by…
Equation of State and Entropy Theory Approach to Thermodynamic Scaling in Polymeric Glass-Forming Liquids
Jack F. Douglas, Wen-Sheng Xu
We show that thermodynamic scaling can be derived by combining the Murnaghan equation of state (EOS) with the generalized entropy theory (GET) of glass formation. In our theory, th…
Polymer Glass Formation: Role of Activation Free Energy, Configurational Entropy, and Collective Motion
Wen-Sheng Xu, Jack F. Douglas, Zhao-Yan Sun
We provide a perspective on polymer glass formation, with an emphasis on models in which the fluid entropy and collective particle motion dominate the theoretical description and d…
Rethinking the Transient Network Concept in Entangled Polymer Rheology
Wen-Sheng Xu, Christopher N. Lam, Jan-Michael Y. Carrillo +2
The classical rheological theories of entangled polymeric liquids are built upon two pillars: Gaussian statistics of entanglement strands and the assumption that the stress arises…
Comment on: "Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts"
Wen-Sheng Xu, Christopher N. Lam, Jan-Michael Y. Carrillo +2
Based on non-equilibrium molecular dynamics simulations of entangled polymer melts, a recent Letter [Phys. Rev. Lett. , 047801 (2018), arXiv:1806.09509] claims that t…
Scaling Behavior of Anisotropy Relaxation in Deformed Polymers
Christopher N. Lam, Wen-Sheng Xu, Wei-Ren Chen +12
Drawing an analogy to the paradigm of quasi-elastic neutron scattering, we present a general approach for quantitatively investigating the spatiotemporal dependence of structural a…
Generalized entropy theory of glass-formation in fully flexible polymer melts
Wen-Sheng Xu, Jack F. Douglas, Karl F. Freed
The generalized entropy theory (GET) offers many insights into how molecular parameters influence polymer glass-formation. Given the fact that chain rigidity often plays a critical…
Self-assembly and glass-formation in a lattice model of telechelic polymer melts: Influence of stiffness of the sticky bonds
Wen-Sheng Xu, Karl F. Freed
The lattice cluster theory (LCT) for strongly interacting, self-assembling telechelic polymers provides a theoretical tool that enables establishing the connections between importa…
Lattice model of linear telechelic polymer melts. II. Influence of chain stiffness on basic thermodynamic properties
Wen-Sheng Xu, Karl F. Freed
The lattice cluster theory (LCT) for semiflexible linear telechelic melts, developed in paper I, is applied to examine the influence of chain stiffness on the average degree of sel…
Lattice model of linear telechelic polymer melts. I. Inclusion of chain semiflexibility in the lattice cluster theory
Wen-Sheng Xu, Karl F. Freed
The lattice cluster theory (LCT) for the thermodynamics of polymer systems has recently been reformulated to treat strongly interacting self-assembling polymers composed of fully f…
Glass formation in a mixture of hard disks and hard ellipses
Wen-Sheng Xu, Xiaozheng Duan, Zhao-Yan Sun +1
We present an event-driven molecular dynamics study of glass formation in two-dimensional binary mixtures composed of hard disks and hard ellipses, where both types of particles ha…
Polymer Glass-Formation in Variable Dimension
Wen-Sheng Xu, Jack F. Douglas, Karl F. Freed
We explore the nature of glass-formation in variable spatial dimensionality () based on the generalized entropy theory, a synthesis of the Adam-Gibbs model with direct computati…
Generalized Entropy Theory of Glass Formation in Polymer Melts with Specific Interactions
Wen-Sheng Xu, Karl F. Freed
Chemical structure has been long recognized to greatly influence polymer glass formation, but a general molecular theory that predicts how chemical structure determines the propert…
Relaxation dynamics in a binary hard-ellipse liquid
Wen-Sheng Xu, Zhao-Yan Sun, Li-Jia An
Structural relaxation in binary hard spherical particles has been shown recently to exhibit a wealth of remarkable features when size disparity or mixture's composition is varied.…
Influence of Cohesive Energy and Chain Stiffness on Polymer Glass Formation
Wen-Sheng Xu, Karl F. Freed
The generalized entropy theory is applied to assess the joint influence of the microscopic cohesive energy and chain stiffness on glass formation in polymer melts using a minimal m…
Lattice cluster theory for polymer melts with specific interactions
Wen-Sheng Xu, Karl F. Freed
Despite the long-recognized fact that chemical structure and specific interactions greatly influence the thermodynamic properties of polymer systems, a predictive molecular theory…
Thermodynamic scaling of dynamics in polymer melts: Predictions from the generalized entropy theory
Wen-Sheng Xu, Karl F. Freed
Many glass-forming fluids exhibit a remarkable thermodynamic scaling in which dynamic properties, such as the viscosity, the relaxation time, and the diffusion constant, can be des…
Hard ellipses: Equation of state, structure and self-diffusion
Wen-Sheng Xu, Yan-Wei Li, Zhao-Yan Sun +1
We present an event-driven molecular dynamics study for hard ellipses and assess the effects of aspect ratio and area fraction on their physical properties. For state points in the…
Effect of attractions on correlation length scales in a glass-forming liquid
Wen-Sheng Xu, Zhao-Yan Sun, Li-Jia An
There is growing evidence that slow dynamics and dynamic heterogeneity possess structural signatures in glass-forming liquids. However, even in the weakly frustrated glass-forming…