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Sarkar S, Lin‐Gibson S. Computational Design of Photocured Polymers Using Stochastic Reaction–Diffusion Simulation. ADVANCED THEORY AND SIMULATIONS 2018. [DOI: 10.1002/adts.201800028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Swarnavo Sarkar
- Biosystems and Biomaterials Division National Institute of Standards and Technology Gaithersburg MD 20899 USA
| | - Sheng Lin‐Gibson
- Biosystems and Biomaterials Division National Institute of Standards and Technology Gaithersburg MD 20899 USA
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Ramos J, Vega JF, Martínez-Salazar J. A new insight into the conformation and melt dynamics of hydrogenated polybutadiene as revealed by computer simulations. SOFT MATTER 2016; 12:3929-3936. [PMID: 27003544 DOI: 10.1039/c5sm03080c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Extensive molecular dynamics simulations of the macromolecular conformation and the melt dynamics for model polymers of different molecular weights have been carried out. The selected models are hydrogenated polybutadienes with a 2% content of ethyl branches and linear polyethylene. It will be shown that the density and chain stiffness are clearly affected by both the molecular weight and the presence of ethyl branches. Furthermore, the results obtained from the simulations on the molecular size and, more remarkably, chain dynamics, perfectly match the neutron scattering experiments performed by Zamponi et al. in hydrogenated polybutadienes. We observe a clear chain contraction and a slow dynamics for the hydrogenated polybutadiene with respect to the linear chain of the same molecular length. Using the Likhtman-McLeish definitions, the obtained values of the entanglement relaxation time (τe) and the tube diameter (a) are found to be in agreement with the available experimental data (by rheology and neutron spin echo) as well as with those obtained by the simulations. Finally, a very good agreement of diffusion coefficients as a function of the molecular weight between simulations and experiments is observed. Therefore, there exists a clear difference between the results obtained for branched and linear polyethylene, accounting for a definitive effect of the short chain branching on the conformational properties and the melt dynamics of polyolefins.
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Affiliation(s)
- Javier Ramos
- Biophym, Departamento de Física Macromolecular, Instituto de Estructura de la Materia, CSIC, c/Serrano 113 bis, 28006 Madrid, Spain.
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Lee T, Oh J, Jeong J, Jung H, Huh J, Chang T, Paik HJ. Figure-Eight-Shaped and Cage-Shaped Cyclic Polystyrenes. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00093] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Taeheon Lee
- Department of Polymer Science and Engineering, Pusan National University, Busan, 46241, Korea
| | - Joongsuk Oh
- Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea
| | - Jonghwa Jeong
- Department of Polymer Science and Engineering, Pusan National University, Busan, 46241, Korea
| | - Haeji Jung
- Department of Polymer Science and Engineering, Pusan National University, Busan, 46241, Korea
| | - June Huh
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Korea
| | - Taihyun Chang
- Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea
| | - Hyun-jong Paik
- Department of Polymer Science and Engineering, Pusan National University, Busan, 46241, Korea
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Ramos J, Vega JF, Martínez-Salazar J. Molecular Dynamics Simulations for the Description of Experimental Molecular Conformation, Melt Dynamics, and Phase Transitions in Polyethylene. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00823] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Javier Ramos
- Biophym, Departamento de
Física Macromolecular, Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 113 bis, 28006 Madrid, Spain
| | - Juan F. Vega
- Biophym, Departamento de
Física Macromolecular, Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 113 bis, 28006 Madrid, Spain
| | - Javier Martínez-Salazar
- Biophym, Departamento de
Física Macromolecular, Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 113 bis, 28006 Madrid, Spain
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Binder K, Baschnagel J, Böhmer S, Paul W. Simulation of the glass transition in polymeric systems: Evidence for an underlying phase transition? ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642819808204987] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kurt Binder
- a Institut für Physik, Johannes Gutenberg-Universität Mainz , Straudingerweg 7, D-55099 , Mainz , Germany
| | - Jörg Baschnagel
- a Institut für Physik, Johannes Gutenberg-Universität Mainz , Straudingerweg 7, D-55099 , Mainz , Germany
| | - Sabine Böhmer
- a Institut für Physik, Johannes Gutenberg-Universität Mainz , Straudingerweg 7, D-55099 , Mainz , Germany
| | - Wolfgang Paul
- a Institut für Physik, Johannes Gutenberg-Universität Mainz , Straudingerweg 7, D-55099 , Mainz , Germany
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Heffernan JV, Budzien J, Avila F, Dotson TC, Aston VJ, McCoy JD, Adolf DB. Rotational relaxation in simple chain models. J Chem Phys 2007; 127:214902. [DOI: 10.1063/1.2798755] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Molin D, Barbieri A, Leporini D. Accurate excluded-volume corrections to the single-chain static properties of a melt of unentangled polymers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2006; 18:7543-7552. [PMID: 21690867 DOI: 10.1088/0953-8984/18/32/003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Actual polymer chains cannot cross themselves and each other. However, the popular Rouse model for unentangled polymers considers the chains as being like 'phantoms'. It is shown that excluded volume effects on single-chain statics may be introduced by analytic corrections to the Rouse results. The final expressions do not depend on free parameters. They exhibit excellent agreement with the molecular-dynamics simulations of polymer melts with chain lengths in the range 3≤M≤30. Preliminary results for entangled polymer melts are presented.
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Affiliation(s)
- D Molin
- Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali, Universitá di Pisa, via Diotisalvi 1, I-56100 Pisa, Italy
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9
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The relationship between diffusion and dynamically accessible volume in polymer chain dynamics simulated with the bond fluctuation model. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.04.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Molina-Mateo J, Meseguer-Dueñas JM, Gómez-Ribelles JL. A Definition of Dynamically Accessible Volume for Thermal Systems. MACROMOL THEOR SIMUL 2006. [DOI: 10.1002/mats.200500054] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Molina-Mateo J, Meseguer-Dueñas J, Gómez-Ribelles J. On the role of inter- and intra-molecular potentials in the simulation of vitrification with the bond fluctuation model. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.06.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mattice WL, Helfer CA, Rane SS, Von Meerwall ED, Farmer BL. Some mechanisms for subtle influences of stereochemical composition on the physical properties of macromolecules. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/polb.20411] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wallace ML, Joós B, Plischke M. Rigidity transition in polymer melts with van der Waals interaction. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2004; 70:041501. [PMID: 15600413 DOI: 10.1103/physreve.70.041501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2004] [Revised: 07/16/2004] [Indexed: 05/24/2023]
Abstract
We study the onset of rigidity near the glass transition (GT) in a short-chain polymer melt modelled by a bead-spring model, where all beads interact with Lennard-Jones potentials. The properties of the system are examined above and below the GT. In order to minimize high-cooling-rate effects and computational times, equilibrium configurations are reached via isothermal compression. We monitor quantities such as the heat capacity CP, the short-time diffusion constants D, the viscosity eta , and the shear modulus; the time-dependent shear modulus Gt is compared with the shear modulus mu obtained from an externally applied instantaneous shear. We give a detailed analysis of the effects of such shearing on the system, both locally and globally. It is found that the polymeric glass displays long-time rigid behavior only below a temperature T1 , where T1 < TG. Furthermore, the linear and nonlinear relaxation regimes under applied shear are discussed.
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Affiliation(s)
- Matthew L Wallace
- Ottawa-Carleton Institute for Physics, University of Ottawa Campus, Ottawa, Ontario, Canada K1N 6N5
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Fernández JR, Harrowell P. Crystal phases of a glass-forming Lennard-Jones mixture. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2003; 67:011403. [PMID: 12636498 DOI: 10.1103/physreve.67.011403] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2002] [Indexed: 05/24/2023]
Abstract
We compare the potential energy at zero temperature of a range of crystal structures for a glass-forming binary mixture of Lennard-Jones particles. The lowest-energy ordered state consists of coexisting phases of a single component face centered cubic structure and an equimolar cesium chloride structure. An infinite number of layered crystal structures are identified with energies close to this ground state. We demonstrate that the finite size increase of the energy of the coexisting crystal with incoherent interfaces is sufficient to destabilize this ordered phase in simulations of typical size. Two specific local coordination structures are identified as of possible structural significance in the amorphous state. We observe rapid crystal growth in the equimolar mixture.
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Affiliation(s)
- Julián R Fernández
- Comisión Nacional de Energía Atómica, Avenida Libertador, 8250 Capital Federal, Buenos Aires, Argentina
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Yamamoto R, Onuki A. Dynamics and rheology of a supercooled polymer melt in shear flow. J Chem Phys 2002. [DOI: 10.1063/1.1488589] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Krushev S, Paul W, Smith GD. The Role of Internal Rotational Barriers in Polymer Melt Chain Dynamics. Macromolecules 2002. [DOI: 10.1021/ma0115794] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Krushev
- Institut für Physik, Johannes-Gutenberg-Universität, Staudingerweg 7, D-55099 Mainz, Germany
| | - W. Paul
- Institut für Physik, Johannes-Gutenberg-Universität, Staudingerweg 7, D-55099 Mainz, Germany
| | - G. D. Smith
- Department of Materials Science and Engineering and Department of Chemical and Fuels Engineering, University of Utah, 122 S. Central Campus Dr. Rm. 304, Salt Lake City, Utah 84112
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Guenza M. Intermolecular Effects in the Center-of-Mass Dynamics of Unentangled Polymer Fluids. Macromolecules 2002. [DOI: 10.1021/ma011596t] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Guenza
- Department of Chemistry, Material Science Institute and Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403
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Simulation of Models for the Glass Transition: Is There Progress? ACTA ACUST UNITED AC 2002. [DOI: 10.1007/3-540-45837-9_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Polymer films in the normal-liquid and supercooled state: a review of recent Monte Carlo simulation results. Adv Colloid Interface Sci 2001. [DOI: 10.1016/s0001-8686(01)00061-6] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Smith G, Paul W, Monkenbusch M, Richter D. A comparison of neutron scattering studies and computer simulations of polymer melts. Chem Phys 2000. [DOI: 10.1016/s0301-0104(00)00228-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ilan B, Loring RF. Relaxation in a supercooled polymer melt within the dynamically disordered Rouse model. J Chem Phys 2000. [DOI: 10.1063/1.481693] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Qian J, Hentschke R, Heuer A. On the origin of dynamic heterogeneities in glass-forming liquids. J Chem Phys 1999. [DOI: 10.1063/1.480368] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Qian J, Hentschke R, Heuer A. Dynamic heterogeneities of translational and rotational motion of a molecular glass former from computer simulations. J Chem Phys 1999. [DOI: 10.1063/1.478334] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- Boaz Ilan
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853
| | - Roger F. Loring
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853
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Rostiashvili VG, Rehkopf M, Vilgis TA. The Hartree approximation in dynamics of polymeric manifolds in the melt. J Chem Phys 1999. [DOI: 10.1063/1.478121] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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