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Oleinik EF, Mazo MA, Strel’nikov IA, Rudnev SN, Salamatina OB. Plasticity Mechanism for Glassy Polymers: Computer Simulation Picture. POLYMER SCIENCE SERIES A 2018. [DOI: 10.1134/s0965545x18010042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mathioudakis IG, Vogiatzis GG, Tzoumanekas C, Theodorou DN. Multiscale simulations of PS-SiO2 nanocomposites: from melt to glassy state. SOFT MATTER 2016; 12:7585-7605. [PMID: 27532769 DOI: 10.1039/c6sm01536k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interaction energetics, molecular packing, entanglement network properties, segmental dynamics, and elastic constants of atactic polystyrene-amorphous silica nanocomposites in the molten and the glassy state are studied via molecular simulations using two interconnected levels of representation: (a) a coarse-grained one, wherein each polystyrene repeat unit is mapped onto a single "superatom" and the silica nanoparticle is viewed as a solid sphere. Equilibration at all length scales at this level is achieved via connectivity-altering Monte Carlo simulations. (b) A united-atom (UA) level, wherein the polymer chains are represented in terms of a united-atom forcefield and the silica nanoparticle is represented in terms of a simplified, fully atomistic model. Initial configurations for UA molecular dynamics (MD) simulations are obtained by reverse mapping well-equilibrated coarse-grained configurations. By analysing microcanonical UA MD trajectories, the polymer density profile is studied and the polymer is found to exhibit layering in the vicinity of the nanoparticle surface. An estimate of the enthalpy of mixing between polymer and nanoparticles, derived from the UA simulations, compares favourably against available experimental values. The dynamical behaviour of polystyrene (in neat and filled melt systems) is characterized in terms of bond orientation and dihedral angle time autocorrelation functions. At low concentration in the molten polymer matrix, silica nanoparticles are found to cause a slight deceleration of the segmental dynamics close to their surface compared to the bulk polymer. Well-equilibrated coarse-grained long-chain configurations are reduced to entanglement networks via topological analysis with the CReTA algorithm, yielding a slightly lower density of entanglements in the filled than in the neat systems. UA melt configurations are glassified by MD cooling. The elastic moduli of the resulting glassy nanocomposites are computed through an analysis of strain fluctuations in the undeformed state and through explicit mechanical deformation by MD, showing a stiffening of the polymer in the presence of nanoparticles. UA simulation results for the elastic constants are compared to continuum micromechanical calculations invoked in homogenization models of the overall mechanical behaviour of heterogeneous materials. They can be interpreted in terms of the presence of an "interphase" of approximate thickness 2 nm around the nanoparticles, with elastic constants intermediate between those of the filler and the matrix.
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Affiliation(s)
- I G Mathioudakis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, GR-15780 Athens, Greece.
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Vogiatzis GG, Theodorou DN. Local Segmental Dynamics and Stresses in Polystyrene–C60 Mixtures. Macromolecules 2013. [DOI: 10.1021/ma402214r] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Georgios G. Vogiatzis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou
Campus, GR-15780 Athens, Greece
| | - Doros N. Theodorou
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou
Campus, GR-15780 Athens, Greece
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Pascua OG, Ahumada O, Laso M, Müller M. The Effect of the Initial Guess Generator on Molecular Mechanics Calculations. MOLECULAR SIMULATION 2010. [DOI: 10.1080/0892702031000089669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- O. García Pascua
- a Department of Chemical Engineering, ETSII , UPM , José Gutiérrez Abascal, 2, Madrid , E-28006 , Spain
| | - O. Ahumada
- a Department of Chemical Engineering, ETSII , UPM , José Gutiérrez Abascal, 2, Madrid , E-28006 , Spain
| | - M. Laso
- a Department of Chemical Engineering, ETSII , UPM , José Gutiérrez Abascal, 2, Madrid , E-28006 , Spain
- b Institut für Polymere , ETH Zürich , Zürich , CH-8092 , Switzerland
| | - M. Müller
- c Department of Computer Science , ETH Zürich , Zürich , CH-8092 , Switzerland
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Carbone P, Ali Karimi-Varzaneh H, Müller-Plathe F. Fine-graining without coarse-graining: an easy and fast way to equilibrate dense polymer melts. Faraday Discuss 2010; 144:25-42; discussion 93-110, 467-81. [DOI: 10.1039/b902363a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mulder T, Harmandaris VA, Lyulin AV, van der Vegt NFA, Kremer K, Michels MAJ. Structural Properties of Atactic Polystyrene of Different Thermal History Obtained from a Multiscale Simulation. Macromolecules 2008. [DOI: 10.1021/ma800873z] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tim Mulder
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - V. A. Harmandaris
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Alexey V. Lyulin
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - N. F. A. van der Vegt
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - K. Kremer
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - M. A. J. Michels
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
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Mulder T, Harmandaris VA, Lyulin AV, van der Vegt NFA, Michels MAJ. Molecular Simulation Via Connectivity-altering Monte Carlo and Scale-jumping Methods: Application to Amorphous Polystyrene. MACROMOL THEOR SIMUL 2008. [DOI: 10.1002/mats.200800024] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Spyriouni T, Tzoumanekas C, Theodorou D, Müller-Plathe F, Milano G. Coarse-Grained and Reverse-Mapped United-Atom Simulations of Long-Chain Atactic Polystyrene Melts: Structure, Thermodynamic Properties, Chain Conformation, and Entanglements. Macromolecules 2007. [DOI: 10.1021/ma0700983] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Theodora Spyriouni
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Christos Tzoumanekas
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Doros Theodorou
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Florian Müller-Plathe
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Giuseppe Milano
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
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Soldera A, Metatla N. Glass transition of polymers: atomistic simulation versus experiments. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2006; 74:061803. [PMID: 17280089 DOI: 10.1103/physreve.74.061803] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2006] [Indexed: 05/13/2023]
Abstract
With experimental investigations and current theories, molecular modeling became an inevitable technique to study the perplexing phenomenon of glass transition. Among polymers, small variations in atomic interactions yield different values of the glass transition temperature, T{g}. To reveal the influence of differences in the atomic functionality on the value of T{g}, and thus to probe the molecular mechanisms responsible for this transition, atomistic simulations have to be undertaken. However, such simulations are argued not to accurately represent physically the glass transition due to the long relaxation times involved. Here we show the universality of the well-known Williams-Landel-Ferry equation for the experimental thermal dependence of polymer viscosities as demonstrated with atomistic simulations. Consequently, atomic aspects could be explicitly revealed. The contribution of atomistic simulation to the study of glass transition is thus confirmed. However, it has to be used complementarily with experiments and coarse-grained simulation to reveal the atomic aspects of current theories.
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Affiliation(s)
- Armand Soldera
- Department of Chemistry, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1.
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Purdue MJ, MacElroy JMD, O'Shea DF, Okuom MO, Blum FD. Molecular dynamics of polystyrene solutions in microwave fields. J Chem Phys 2006; 124:204904. [PMID: 16774381 DOI: 10.1063/1.2197496] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Equilibrium and nonequilibrium molecular dynamics simulation techniques were used to assess the influence of an applied microwave field on the dynamics of methylamine-methanol and methylamine-dimethylformamide (DMF) solutions bound within atactic polystyrene over a range of polymer densities from 35 to 96 wt % polymer. Atomistically detailed systems were studied, ranging from 3000 to 10 644 particles, using previously established potential models. Structural and dynamical properties were determined in the canonical (NVT) ensemble at 298 K. The simulated DMF self-diffusion coefficients in polystyrene solutions were compared with the zero-field experimental results established with pulsed-gradient spin-echo NMR spectrometry. A simulated external microwave field, with a rms electric field intensity of 0.1 VA, was applied to these systems and the simulated dynamical results over field frequencies up to 10(4) GHz were compared with the zero-field values. Simulated evidence of athermal effects on the diffusive characteristics of these mixtures is reported.
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Affiliation(s)
- Mark J Purdue
- UCD School of Chemical and Bioprocess Engineering, The Centre for Synthesis and Chemical Biology, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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Mattice WL, Waheed N. An Assessment of the Role of Quenched Randomness in the Stereochemical Sequences of Atactic Vinyl Polymers. Macromolecules 2006. [DOI: 10.1021/ma052434q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wayne L. Mattice
- Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
| | - Numan Waheed
- Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
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Horta A, Freire JJ. Block and alternating copolymer chains of styrene–vinylmethylether and styrene–methylmethacrylate by molecular dynamics simulation. POLYMER 2004. [DOI: 10.1016/j.polymer.2003.12.060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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van Melick H, Govaert L, Raas B, Nauta W, Meijer H. Kinetics of ageing and re-embrittlement of mechanically rejuvenated polystyrene. POLYMER 2003. [DOI: 10.1016/s0032-3861(02)00863-7] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Colhoun FL, Armstrong RC, Rutledge GC. Analysis of Experimental Data for Polystyrene Orientation during Stress Relaxation Using Semigrand Canonical Monte Carlo Simulation. Macromolecules 2002. [DOI: 10.1021/ma020347h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frederick L. Colhoun
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Robert C. Armstrong
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Gregory C. Rutledge
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Colhoun FL, Armstrong RC, Rutledge GC. Orientation Relaxation in Sheared Polystyrene Melts Measured by 13C SMAS-DECODER NMR. Macromolecules 2001. [DOI: 10.1021/ma0103932] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Frederick L. Colhoun
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Robert C. Armstrong
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Gregory C. Rutledge
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Dunbar MG, Sandström D, Schmidt-Rohr K. Characterization of Polystyrene Conformation by Solid-State NMR Correlation of C−2H and 13C−13C Bond Orientations. Macromolecules 2000. [DOI: 10.1021/ma992083d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. G. Dunbar
- Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - D. Sandström
- Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - K. Schmidt-Rohr
- Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, Massachusetts 01003
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