Continuous rheological description of highly filled polymer melts for material extrusion
Sign Up to like & getrecommendations! Published in 2020 at "Applied Materials Today"
DOI: 10.1016/j.apmt.2020.100754
Abstract: Abstract In additive manufacturing based on the material extrusion of filled polymer melts, a correct description of the rheological behaviour of the processed material is an important requirement. In case of highly filled feedstocks, complexities… read more here.
Keywords: highly filled; polymer melts; polymer; description ... See more keywords
Signature of reptation in the long-time behavior of the deuteron NMR Free Induction Decay in high molecular mass polymer melts
Sign Up to like & getrecommendations! Published in 2018 at "Polymer"
DOI: 10.1016/j.polymer.2018.03.050
Abstract: Abstract The classical tube-reptation (TR) model is based on the assumption, that in entangled polymer melts diffusion takes place inside the effective tubes having a conformation of ideal chains and being stable on the time… read more here.
Keywords: free induction; induction decay; time; polymer melts ... See more keywords
Molecular process of stress relaxation for sheared polymer melts
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DOI: 10.1016/j.polymer.2020.122683
Abstract: Abstract While the stress relaxation has been one of the most useful protocols in polymer rheology, the underlying molecular processes have not yet been fully analyzed with direct quantification and have appeared to be somewhat… read more here.
Keywords: molecular process; stress relaxation; relaxation; polymer melts ... See more keywords
Mobility of Polymer Melts in a Regular Array of Carbon Nanotubes.
Sign Up to like & getrecommendations! Published in 2022 at "Journal of chemical theory and computation"
DOI: 10.1021/acs.jctc.1c01281
Abstract: In polymer nanocomposites, mechanical properties essentially depend on the alignment of nanoparticles and polymers. In this work, we investigate an entangled polymer melt in a confinement computationally, in order to get an insight into the… read more here.
Keywords: mobility; polymer; mobility polymer; polymer melts ... See more keywords
Viscoelastic Response of Dispersed Entangled Polymer Melts
Sign Up to like & getrecommendations! Published in 2020 at "Macromolecules"
DOI: 10.1021/acs.macromol.0c01403
Abstract: Polymer synthesis routes result in macromolecules with molecular weight dispersity ĐM that depends on the polymerization mechanism. The lowest dispersity polymers are those made by anionic and atom... read more here.
Keywords: viscoelastic response; response dispersed; entangled polymer; dispersed entangled ... See more keywords
Rheology and Entanglement Structure of Well-Entangled Polymer Melts: A Slip-Link Simulation Study
Sign Up to like & getrecommendations! Published in 2019 at "Macromolecules"
DOI: 10.1021/acs.macromol.9b00314
Abstract: We have extended the slip-link model originally developed by Doi and Takimoto [Philos. Trans. R. Soc. London, A 2003, 361, 641] to calculate fast shear and uniaxial elongational flows. The original Doi–Takimoto (DT) model shows… read more here.
Keywords: slip link; entangled polymer; model; rheology ... See more keywords
Comment on "Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts".
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.059803
Abstract: Based on non-equilibrium molecular dynamics simulations of entangled polymer melts, a recent Letter [Phys. Rev. Lett. $\textbf{121}$, 047801 (2018), arXiv:1806.09509] claims that the rising extensional stress is quantitatively consistent with the decreasing entropy of chains… read more here.
Keywords: entangled polymer; stress; comment relating; extensional stress ... See more keywords
On the molecular weight dependence of slip velocity of polymer melts
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Rheology"
DOI: 10.1122/1.4984759
Abstract: Theoretical models regarding the slip of polymer melts are compared with the experimental results of several researchers on the basis of the molecular weight (Mw) dependence of the slip velocity (Vs). Using simple assumptions, it… read more here.
Keywords: adsorbed chains; weight dependence; polymer melts; polymer ... See more keywords
Influence of hydrostatic pressure on rheological properties of polymer melts—A review
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Rheology"
DOI: 10.1122/1.5142059
Abstract: Rheological properties of polymer melts are significantly dependent on molecular structure and external parameters. While numerous experimental data of the dependence of the rheological behavior on stress, shear rate, and temperature are available in the… read more here.
Keywords: pressure; pressure coefficients; polymer melts; rheological properties ... See more keywords
Probing the nonequilibrium dynamics of stress, orientation, and entanglements in polymer melts with orthogonal interrupted shear simulations
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Rheology"
DOI: 10.1122/8.0000407
Abstract: Both entangled and unentangled polymer melts exhibit stress overshoots when subject to shearing flow. The size of the overshoot depends on the applied shear rate and is related to relaxation mechanisms such as reptation, chain… read more here.
Keywords: chain; interrupted shear; orientation; relaxation ... See more keywords
Simple, Accurate and User-Friendly Differential Constitutive Model for the Rheology of Entangled Polymer Melts and Solutions from Nonequilibrium Thermodynamics.
Sign Up to like & getrecommendations! Published in 2020 at "Materials"
DOI: 10.3390/ma13122867
Abstract: In a recent reformulation of the Marrucci-Ianniruberto constitutive equation for the rheology of entangled polymer melts in the context of nonequilibrium thermodynamics, rather large values of the convective constraint release parameter βccr had to be… read more here.
Keywords: rheology entangled; entangled polymer; model; rheology ... See more keywords