Computer simulations of supercooled polymer melts in the bulk and in confined geometry

J Baschnagel, F Varnik - Journal of Physics: Condensed Matter, 2005 - iopscience.iop.org
We survey results of computer simulations for the structure and dynamics of supercooled
polymer melts and films. Our survey is mainly concerned with features of a coarse grained …

Fast dynamics in a model metallic glass-forming material

H Zhang, X Wang, HB Yu, JF Douglas - The Journal of Chemical …, 2021 - pubs.aip.org
We investigate the fast β-and Johari–Goldstein (JG) β-relaxation processes, along with the
elastic scattering response of glass-forming (GF) liquids and the boson peak, in a simulated …

[HTML][HTML] Understanding the role of cross-link density in the segmental dynamics and elastic properties of cross-linked thermosets

X Zheng, Y Guo, JF Douglas, W Xia - The Journal of Chemical Physics, 2022 - pubs.aip.org
Cross-linking is known to play a pivotal role in the relaxation dynamics and mechanical
properties of thermoset polymers, which are commonly used in structural applications …

Antiplasticization and the elastic properties of glass-forming polymer liquids

RA Riggleman, JF Douglas, JJ de Pablo - Soft Matter, 2010 - pubs.rsc.org
We investigate the effect of antiplasticizer additives on long-wavelength thermodynamic
properties relating to the efficiency of molecular packing (density ρ and isothermal …

Parallel emergence of rigidity and collective motion in a family of simulated glass-forming polymer fluids

X Xu, JF Douglas, WS Xu - Macromolecules, 2023 - ACS Publications
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 …

Molecular underpinnings of the mechanical reinforcement in polymer nanocomposites

S Sen, JD Thomin, SK Kumar, P Keblinski - Macromolecules, 2007 - ACS Publications
Equilibrium molecular dynamics simulations on amorphous polymers filled with solid
nanoparticles show that mechanical reinforcement results from the formation of a long-lived …

The initiation of shear band formation in deformed metallic glasses from soft localized domains

X Wang, H Zhang, JF Douglas - The Journal of Chemical Physics, 2021 - pubs.aip.org
It has long been thought that shear band (SB) formation in amorphous solids initiates from
relatively “soft” regions in the material in which large-scale non-affine deformations become …

Variation of the glass transition temperature with rigidity and chemical composition

GG Naumis - Physical Review B—Condensed Matter and Materials …, 2006 - APS
The effects of flexibility and chemical composition in the variation of the glass transition
temperature are obtained by using the Lindemann criteria, which relates melting …

Applicability of UV-Curable Binders in High Solid Suspensions for Direct-Ink-Write 3D Printing in Extremely Cold Temperatures

A Marnot, L Konzelman, JM Jones, C Hill… - … Applied Materials & …, 2023 - ACS Publications
Leveraging material extrusion 3D printing of high solid suspensions for rapid manufacturing
in future space missions requires materials compatible with the unique environments found …

Nonlocal viscosity of polymer melts approaching their glassy state

RM Puscasu, BD Todd, PJ Daivis… - The Journal of chemical …, 2010 - pubs.aip.org
The nonlocal viscosity kernels of polymer melts have been determined by means of
equilibrium molecular dynamics upon cooling toward the glass transition. Previous results …