1
|
Li W, Jana PK, Behbahani AF, Kritikos G, Schneider L, Polińska P, Burkhart C, Harmandaris VA, Müller M, Doxastakis M. Dynamics of Long Entangled Polyisoprene Melts via Multiscale Modeling. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01376] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Li
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Pritam K. Jana
- Institute for Theoretical Physics, Georg-August University, 37077 Göttingen, Germany
| | - Alireza F. Behbahani
- Institute of Applied and Computational Mathematics, Foundation for Research and Technology-Hellas, Heraklion GR-71110, Greece
| | - Georgios Kritikos
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ludwig Schneider
- Institute for Theoretical Physics, Georg-August University, 37077 Göttingen, Germany
| | | | - Craig Burkhart
- The Goodyear Tire & Rubber Company, Akron, Ohio 44305, United States
| | - Vagelis A. Harmandaris
- Institute of Applied and Computational Mathematics, Foundation for Research and Technology-Hellas, Heraklion GR-71110, Greece
- Department of Mathematics and Applied Mathematics, University of Crete, Heraklion GR-71110, Greece
- Computation-based Science and Technology Research Center, The Cyprus Institute, Nicosia 2121, Cyprus
| | - Marcus Müller
- Institute for Theoretical Physics, Georg-August University, 37077 Göttingen, Germany
| | - Manolis Doxastakis
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| |
Collapse
|
2
|
Wu C, Li K, Ning X, Zhang L. An Enhanced Scheme for Multiscale Modeling of Thermomechanical Properties of Polymer Bulks. J Phys Chem B 2021; 125:8612-8626. [PMID: 34291641 DOI: 10.1021/acs.jpcb.1c02663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
While multiscale modeling significantly enhances the capability of molecular simulations of polymer systems, it is well realized that the systematically derived coarse-grained (CG) models generally underestimate the thermomechanical properties. In this work, a charge-based mapping scheme has been adopted to include explicit electrostatic interactions and benchmarked against two typical polymers, atactic poly(methyl methacrylate) (PMMA) and polystyrene (PS). The CG potentials are parameterized against the oligomer bulks of nine monomers per chain to match the essential structural features and the two basic pressure-volume-temperature (PVT) properties, which are obtained from the all-atomistic (AA) molecular dynamics (MD) simulations at a single elevated temperature. The so-parameterized CG potentials are extended with the MD method to simulate the two polymer bulks of one hundred monomers per chain over a wide temperature range. Without any scaling, all the simulated results, including mass densities and bulk moduli at room temperature, thermal expansion coefficients at rubbery and glassy states, and glass transition temperatures (Tg), compare well with the corresponding experimental data. The proposed scheme not only contributes to realistically simulating various thermomechanical properties of both apolar and polar polymers but also allows for directly simulating their electrical properties.
Collapse
Affiliation(s)
- Chaofu Wu
- Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, P. R. China
| | - Kewen Li
- Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, P. R. China
| | - Xutao Ning
- Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, P. R. China
| | - Lei Zhang
- Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, P. R. China
| |
Collapse
|
3
|
|
4
|
Ge T, Wang J, Robbins MO. Effects of Coarse-Graining on Molecular Simulations of Mechanical Properties of Glassy Polymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ting Ge
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Jiuling Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Mark O. Robbins
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
| |
Collapse
|
5
|
Wu C. Tacticity Effects on Polymer Glass Transition Revisited by Coarse‐Grained Simulations. MACROMOL THEOR SIMUL 2020. [DOI: 10.1002/mats.202000001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Chaofu Wu
- Hunan Provincial Key Laboratory of Fine Ceramics and Powder MaterialsSchool of Materials and Environmental EngineeringHunan University of Humanities Science and Technology Loudi Hunan 417000 China
| |
Collapse
|
6
|
Rasouli S, Moghbeli MR, Nikkhah SJ. A deep insight into the polystyrene chain in cyclohexane at theta temperature: molecular dynamics simulation and quantum chemical calculations. J Mol Model 2019; 25:195. [DOI: 10.1007/s00894-019-4078-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 05/28/2019] [Indexed: 10/26/2022]
|
7
|
Karatrantos A, Composto RJ, Winey KI, Kröger M, Clarke N. Modeling of Entangled Polymer Diffusion in Melts and Nanocomposites: A Review. Polymers (Basel) 2019; 11:E876. [PMID: 31091725 PMCID: PMC6571671 DOI: 10.3390/polym11050876] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/06/2019] [Accepted: 05/09/2019] [Indexed: 11/29/2022] Open
Abstract
This review concerns modeling studies of the fundamental problem of entangled (reptational) homopolymer diffusion in melts and nanocomposite materials in comparison to experiments. In polymer melts, the developed united atom and multibead spring models predict an exponent of the molecular weight dependence to the polymer diffusion very similar to experiments and the tube reptation model. There are rather unexplored parameters that can influence polymer diffusion such as polymer semiflexibility or polydispersity, leading to a different exponent. Models with soft potentials or slip-springs can estimate accurately the tube model predictions in polymer melts enabling us to reach larger length scales and simulate well entangled polymers. However, in polymer nanocomposites, reptational polymer diffusion is more complicated due to nanoparticle fillers size, loading, geometry and polymer-nanoparticle interactions.
Collapse
Affiliation(s)
- Argyrios Karatrantos
- Materials Research and Technology, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
| | - Russell J Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Karen I Winey
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Martin Kröger
- Polymer Physics, Department of Materials, ETH Zurich, Leopold-Ruzicka-Weg 4, CH-8093 Zurich, Switzerland.
| | - Nigel Clarke
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK.
| |
Collapse
|
8
|
Di W, Gao X, Huang W, Sun Y, Lei H, Liu Y, Li W, Li Y, Wang X, Qin M, Zhu Z, Cao Y, Wang W. Direct Measurement of Length Scale Dependence of the Hydrophobic Free Energy of a Single Collapsed Polymer Nanosphere. PHYSICAL REVIEW LETTERS 2019; 122:047801. [PMID: 30768307 DOI: 10.1103/physrevlett.122.047801] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/15/2018] [Indexed: 06/09/2023]
Abstract
The physics underlying hydrophobicity at macroscopic and microscopic levels is fundamentally distinct. However, experimentally quantifying the length scale dependence of hydrophobicity is challenging. Here we show that the size-dependent hydrophobic free energy of a collapsed polymer nanosphere can be continuously monitored from its single-molecule force-extension curve using a novel theoretical framework. The hydrophobic free energy shows a change from cubic to square dependence of the radius of the polymer nanosphere at a radius of ∼1 nm-this is consistent with Lum-Chandler-Weeks theory and simulations. We can also observe a large variation of the hydrophobic free energy of each polymer nanosphere implying the heterogeneity of the self-assembled structures and/or the fluctuation of the water-polymer interface. We expect that our approach can be used to address many fundamental questions about hydrophobic hydration, which are otherwise inaccessible by ensemble measurements.
Collapse
Affiliation(s)
- Weishuai Di
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Xiang Gao
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Wenmao Huang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yang Sun
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Hai Lei
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yang Liu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Wenfei Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Institute for Brain Sciences, Nanjing University, Nanjing 210023, People's Republic of China
| | - Yiran Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Xin Wang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Meng Qin
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Zhenshu Zhu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yi Cao
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Institute for Brain Sciences, Nanjing University, Nanjing 210023, People's Republic of China
| | - Wei Wang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Institute for Brain Sciences, Nanjing University, Nanjing 210023, People's Republic of China
| |
Collapse
|
9
|
Ren KX, Jia XM, Jiao GS, Chen T, Qian HJ, Lu ZY. Interfacial Properties and Hopping Diffusion of Small Nanoparticle in Polymer/Nanoparticle Composite with Attractive Interaction on Side Group. Polymers (Basel) 2018; 10:E598. [PMID: 30966632 PMCID: PMC6403981 DOI: 10.3390/polym10060598] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/21/2018] [Accepted: 05/25/2018] [Indexed: 12/03/2022] Open
Abstract
The diffusion dynamics of fullerene (C 60 ) in unentangled linear atactic polystyrene (PS) and polypropylene (PP) melts and the structure and dynamic properties of polymers in interface area are investigated by performing all-atom molecular dynamics simulations. The comparison of the results in two systems emphasises the influence of local interactions exerted by polymer side group on the diffusion dynamics of the nanoparticle. In the normal diffusive regime at long time scales, the displacement distribution function (DDF) follows a Gaussian distribution in PP system, indicating a normal diffusion of C 60 . However, we observe multiple peaks in the DDF curve for C 60 diffusing in PS melt, which indicates a diffusion mechanism of hopping of C 60 . The attractive interaction between C 60 and phenyl ring side groups are found to be responsible for the observed hopping diffusion. In addition, we find that the C 60 is dynamically coupled with a subsection of a tetramer on PS chain, which has a similar size with C 60 . The phenyl ring on PS chain backbone tends to have a parallel configuration in the vicinity of C 60 surface, therefore neighbouring phenyl rings can form chelation effect on the C 60 surface. Consequently, the rotational dynamics of phenyl ring and the translational diffusion of styrene monomers are found to be slowed down in this interface area. We hope our results can be helpful for understanding of the influence of the local interactions on the nanoparticle diffusion dynamics and interfacial properties in polymer/nanoparticle composites.
Collapse
Affiliation(s)
- Kai-Xin Ren
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Xiang-Meng Jia
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Gui-Sheng Jiao
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Tao Chen
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Hu-Jun Qian
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Zhong-Yuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| |
Collapse
|
10
|
Liu C, Kremer K, Bereau T. Polymorphism of Syndiotactic Polystyrene Crystals from Multiscale Simulations. ADVANCED THEORY AND SIMULATIONS 2018. [DOI: 10.1002/adts.201800024] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Chan Liu
- Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
| | - Kurt Kremer
- Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
| | - Tristan Bereau
- Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
| |
Collapse
|
11
|
Jiménez-Serratos G, Herdes C, Haslam AJ, Jackson G, Müller EA. Group Contribution Coarse-Grained Molecular Simulations of Polystyrene Melts and Polystyrene Solutions in Alkanes Using the SAFT-γ Force Field. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02072] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Carmelo Herdes
- Department
of Chemical Engineering, University of Bath, Bath BA2 7AY, U.K
| | - Andrew J. Haslam
- Department
of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - George Jackson
- Department
of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Erich A. Müller
- Department
of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| |
Collapse
|
12
|
Gooneie A, Schuschnigg S, Holzer C. A Review of Multiscale Computational Methods in Polymeric Materials. Polymers (Basel) 2017; 9:E16. [PMID: 30970697 PMCID: PMC6432151 DOI: 10.3390/polym9010016] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/07/2016] [Accepted: 12/22/2016] [Indexed: 11/17/2022] Open
Abstract
Polymeric materials display distinguished characteristics which stem from the interplay of phenomena at various length and time scales. Further development of polymer systems critically relies on a comprehensive understanding of the fundamentals of their hierarchical structure and behaviors. As such, the inherent multiscale nature of polymer systems is only reflected by a multiscale analysis which accounts for all important mechanisms. Since multiscale modelling is a rapidly growing multidisciplinary field, the emerging possibilities and challenges can be of a truly diverse nature. The present review attempts to provide a rather comprehensive overview of the recent developments in the field of multiscale modelling and simulation of polymeric materials. In order to understand the characteristics of the building blocks of multiscale methods, first a brief review of some significant computational methods at individual length and time scales is provided. These methods cover quantum mechanical scale, atomistic domain (Monte Carlo and molecular dynamics), mesoscopic scale (Brownian dynamics, dissipative particle dynamics, and lattice Boltzmann method), and finally macroscopic realm (finite element and volume methods). Afterwards, different prescriptions to envelope these methods in a multiscale strategy are discussed in details. Sequential, concurrent, and adaptive resolution schemes are presented along with the latest updates and ongoing challenges in research. In sequential methods, various systematic coarse-graining and backmapping approaches are addressed. For the concurrent strategy, we aimed to introduce the fundamentals and significant methods including the handshaking concept, energy-based, and force-based coupling approaches. Although such methods are very popular in metals and carbon nanomaterials, their use in polymeric materials is still limited. We have illustrated their applications in polymer science by several examples hoping for raising attention towards the existing possibilities. The relatively new adaptive resolution schemes are then covered including their advantages and shortcomings. Finally, some novel ideas in order to extend the reaches of atomistic techniques are reviewed. We conclude the review by outlining the existing challenges and possibilities for future research.
Collapse
Affiliation(s)
- Ali Gooneie
- Chair of Polymer Processing, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700 Leoben, Austria.
| | - Stephan Schuschnigg
- Chair of Polymer Processing, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700 Leoben, Austria.
| | - Clemens Holzer
- Chair of Polymer Processing, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700 Leoben, Austria.
| |
Collapse
|
13
|
Jain A, Sheats J, Reifenberger JG, Cao H, Dorfman KD. Modeling the relaxation of internal DNA segments during genome mapping in nanochannels. BIOMICROFLUIDICS 2016; 10:054117. [PMID: 27795749 PMCID: PMC5065570 DOI: 10.1063/1.4964927] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 10/04/2016] [Indexed: 06/01/2023]
Abstract
We have developed a multi-scale model describing the dynamics of internal segments of DNA in nanochannels used for genome mapping. In addition to the channel geometry, the model takes as its inputs the DNA properties in free solution (persistence length, effective width, molecular weight, and segmental hydrodynamic radius) and buffer properties (temperature and viscosity). Using pruned-enriched Rosenbluth simulations of a discrete wormlike chain model with circa 10 base pair resolution and a numerical solution for the hydrodynamic interactions in confinement, we convert these experimentally available inputs into the necessary parameters for a one-dimensional, Rouse-like model of the confined chain. The resulting coarse-grained model resolves the DNA at a length scale of approximately 6 kilobase pairs in the absence of any global hairpin folds, and is readily studied using a normal-mode analysis or Brownian dynamics simulations. The Rouse-like model successfully reproduces both the trends and order of magnitude of the relaxation time of the distance between labeled segments of DNA obtained in experiments. The model also provides insights that are not readily accessible from experiments, such as the role of the molecular weight of the DNA and location of the labeled segments that impact the statistical models used to construct genome maps from data acquired in nanochannels. The multi-scale approach used here, while focused towards a technologically relevant scenario, is readily adapted to other channel sizes and polymers.
Collapse
Affiliation(s)
- Aashish Jain
- Department of Chemical Engineering and Materials Science, University of Minnesota-Twin Cities , 421 Washington Ave. SE, Minneapolis, Minnesota 55455, USA
| | - Julian Sheats
- Department of Chemical Engineering and Materials Science, University of Minnesota-Twin Cities , 421 Washington Ave. SE, Minneapolis, Minnesota 55455, USA
| | | | - Han Cao
- BioNano Genomics , 9640 Towne Centre Drive, Suite 100, San Diego, California 92121, USA
| | - Kevin D Dorfman
- Department of Chemical Engineering and Materials Science, University of Minnesota-Twin Cities , 421 Washington Ave. SE, Minneapolis, Minnesota 55455, USA
| |
Collapse
|
14
|
Moore TC, Iacovella CR, McCabe C. Development of a coarse-grained water forcefield via multistate iterative Boltzmann inversion. FOUNDATIONS OF MOLECULAR MODELING AND SIMULATION : SELECT PAPERS FROM FOMMS 2015. INTERNATIONAL CONFERENCE ON FOUNDATIONS OF MOLECULAR MODELING AND SIMULATION (6TH : 2015 : MOUNT HOOD, OR.) 2016; 2016:37-52. [PMID: 32483559 PMCID: PMC7262820 DOI: 10.1007/978-981-10-1128-3_3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A coarse-grained water model is developed using multistate iterative Boltzmann inversion. Following previous work, the k-means algorithm is used to dynamically map multiple water molecules to a single coarse-grained bead, allowing the use of structure-based coarse-graining methods. The model is derived to match the bulk and interfacial properties of liquid water and improves upon previous work that used single state iterative Boltzmann inversion. The model accurately reproduces the density and structural correlations of water at 305 K and 1.0 atm, stability of a liquid droplet at 305 K, and shows little tendency to crystallize at physiological conditions. This work also illustrates several advantages of using multistate iterative Boltzmann inversion for deriving generally applicable coarse-grained forcefields.
Collapse
Affiliation(s)
- Timothy C. Moore
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235
- Vanderbilt University Center for Multiscale Modeling and Simulation (MuMS), Nashville, TN 37235
| | - Christopher R. Iacovella
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235
- Vanderbilt University Center for Multiscale Modeling and Simulation (MuMS), Nashville, TN 37235
| | - Clare McCabe
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235
- Vanderbilt University Center for Multiscale Modeling and Simulation (MuMS), Nashville, TN 37235
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235
| |
Collapse
|
15
|
Melt-phase behavior of collapsed PMMA/PVC chains revealed by multiscale simulations. J Mol Model 2016; 22:99. [DOI: 10.1007/s00894-016-2963-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 03/14/2016] [Indexed: 12/20/2022]
|
16
|
Peng YJ, Cai CT, Zhang RC, Chen TH, Sun PC, Li BH, Wang XL, Xue G, Shi AC. Probing the two-stage transition upon crossing the glass transition of polystyrene by solid-state NMR. CHINESE JOURNAL OF POLYMER SCIENCE 2016. [DOI: 10.1007/s10118-016-1762-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
17
|
Xiao Q, Guo H. Transferability of a coarse-grained atactic polystyrene model: the non-bonded potential effect. Phys Chem Chem Phys 2016; 18:29808-29824. [DOI: 10.1039/c6cp03753d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, we construct an efficient and simple coarse grained (CG) model for atactic polystyrene (PS) by using a 1 : 1 mapping scheme at 463 K and 1 atm pressure and derive the corresponding bonded and non-bonded potentials in the CG force field (FF) via a direct Boltzmann inversion approach and a combined structure-based and thermodynamic quantities-based CG method, respectively.
Collapse
Affiliation(s)
- Qiang Xiao
- Beijing National Laboratory for Molecular Sciences
- Joint Laboratory of Polymer Sciences and Materials
- State Key Laboratory of Polymer Physics and Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Hongxia Guo
- Beijing National Laboratory for Molecular Sciences
- Joint Laboratory of Polymer Sciences and Materials
- State Key Laboratory of Polymer Physics and Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
| |
Collapse
|
18
|
Developing coarse-grained potentials for the prediction of multi-properties of trans-1,4-polybutadiene melt. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.05.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
19
|
Wang H, Shentu B, Faller R. Molecular dynamics of different polymer blends containing poly(2,6-dimethyl-1,4-phenylene ether). Phys Chem Chem Phys 2015; 17:4714-23. [PMID: 25589351 DOI: 10.1039/c4cp03392b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed atomistic molecular dynamics simulations were performed to investigate the behavior of two different binary blends, a miscible system poly(2,6-dimethyl-1,4-phenylene ether)-polystyrene (PPE-PS) and an immiscible system poly(2,6-dimethyl-1,4-phenylene ether)-poly(methyl methacrylate) (PPE-PMMA). We compared these two blends to study how PPE behaves when blended with different polymers. In both cases, the structure and phase behavior of polymer melts were studied by means of radial distribution functions (RDFs). Radii of gyration illustrate the static properties. Packing features of the benzene rings were observed in PPE and PS, both PS and PPE were well dispersed over the whole time scale of simulation. Furthermore, there was a tendency for aggregation of PMMA chains in PPE-PMMA systems. The mean squared displacements of monomers and whole chains describe the mobility of polymers in various systems.
Collapse
Affiliation(s)
- Huan Wang
- Department of Chemical Engineering & Materials Science, University of California Davis, One Shields Ave, Davis, California 95616, USA.
| | | | | |
Collapse
|
20
|
Xu Q, Chen L. Integral equation theory for atactic polystyrene nanocomposite melts with a multi-site model. J Chem Phys 2014; 140:234901. [PMID: 24952562 DOI: 10.1063/1.4882355] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this work, a multi-site chain model was incorporated into the polymer reference interaction site model to investigate the structure and properties of atactic polystyrene (aPS) melt and the structural correlations of dilute spherical nanoparticles dissolved in aPS melt. The theoretically calculated X-ray scattering intensities, solubility parameters and intermolecular correlation functions of aPS and its nanocomposites are found to be in agreement with the corresponding molecular simulation and experimental data. The theory was further employed to investigate the distribution functions of different size effects of aPS-nanoparticle system with consideration of the potential of mean force and depletion force. The aggregation of large nanoparticles increases with the increase of the nanoparticle-site size ratio in the infinitely dilute limit. The results show that the present theory can be used to investigate the structure of aPS melt and its nanocomposite, and give a further understanding of the filler dispersion and aggregation. All the observations indicate molecular-level details of the underlying mechanisms, providing useful information for the future design control of new aPS-nanocomposite materials with tailored properties.
Collapse
Affiliation(s)
- Qinzhi Xu
- Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
| | - Lan Chen
- Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
| |
Collapse
|
21
|
Agrawal A, Aryal D, Perahia D, Ge T, Grest GS. Coarse-Graining Atactic Polystyrene and Its Analogues. Macromolecules 2014. [DOI: 10.1021/ma500319v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anupriya Agrawal
- Department
of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Dipak Aryal
- Department
of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Dvora Perahia
- Department
of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Ting Ge
- Department
of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Gary S. Grest
- Sandia
National Laboratories, Albuquerque, New Mexico 87185, United States
| |
Collapse
|
22
|
Lazutin AA, Glagolev MK, Vasilevskaya VV, Khokhlov AR. Hypercrosslinked polystyrene networks: An atomistic molecular dynamics simulation combined with a mapping/reverse mapping procedure. J Chem Phys 2014; 140:134903. [DOI: 10.1063/1.4869695] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
23
|
Bayramoglu B, Faller R. Modeling of Polystyrene under Confinement: Exploring the Limits of Iterative Boltzmann Inversion. Macromolecules 2013. [DOI: 10.1021/ma400831g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Beste Bayramoglu
- Department of Chemical Engineering & Materials Science, UC Davis, Davis, California 95616, United States
- Department
of Food Engineering, Izmir Institute of Technology, Izmir, Turkey 35430
| | - Roland Faller
- Department of Chemical Engineering & Materials Science, UC Davis, Davis, California 95616, United States
| |
Collapse
|
24
|
|
25
|
di Pasquale N, Marchisio D, Carbone P. Mixing atoms and coarse-grained beads in modelling polymer melts. J Chem Phys 2013; 137:164111. [PMID: 23126699 DOI: 10.1063/1.4759504] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a simple hybrid model for macromolecules where the single molecules are modelled with both atoms and coarse-grained beads. We apply our approach to two different polymer melts, polystyrene and polyethylene, for which the coarse-grained potential has been developed using the iterative Boltzmann inversion procedure. Our results show that it is possible to couple the two potentials without modifying them and that the mixed model preserves the local and the global structure of the melts in each of the case presented. The degree of resolution present in each single molecule seems to not affect the robustness of the model. The mixed potential does not show any bias and no cluster of particles of different resolution has been observed.
Collapse
Affiliation(s)
- Nicodemo di Pasquale
- Department of Applied Science and Technology, Institute of Chemical Engineering, Politecnico di Torino, C.so Duca degli Abruzzi, 24, 10129, Italy
| | | | | |
Collapse
|
26
|
Rosch TW, Brennan JK, Izvekov S, Andzelm JW. Exploring the ability of a multiscale coarse-grained potential to describe the stress-strain response of glassy polystyrene. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:042606. [PMID: 23679442 DOI: 10.1103/physreve.87.042606] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 03/01/2013] [Indexed: 06/02/2023]
Abstract
A new particle-based bottom-up method to develop coarse-grained models of polymers is presented and applied to polystyrene. The multiscale coarse-graining (MS-CG) technique of Izvekov et al. [J. Chem. Phys. 120, 10896 (2004)] is applied to a polymer system to calculate nonbonded interactions. The inverse Boltzmann inversion method was used to parametrize the bonded and bond-angle bending interactions. Molecular dynamics simulations were performed, and the CG model exhibited a significantly lower modulus compared to the atomistic model at low temperature and high strain rate. In an attempt to improve the CG model performance, several other parametrization schemes were used to build other models from this base model. The first of these models included standard frictional forces through use of the constant-temperature dissipative particle dynamics method that improved the modulus, yet was not transferrable to higher temperatures and lower strain rates. Other models were built by increasing the attraction between CG beads through direct manipulation of the nonbonded potential, where an improvement of the stress response was found. For these models, two parametrization protocols that shifted the force to more attractive values were explored. The first protocol involved a uniform shift, while the other protocol shifted the force in a more localized region. The uniformly shifted potential greatly affected the structure of the equilibrium model as compared to the locally shifted potential, yet was more transferrable to different temperatures and strain rates. Further improvements in the coarse-graining protocol to generate models that more satisfactorily capture mechanical properties are suggested.
Collapse
Affiliation(s)
- Thomas W Rosch
- U.S. Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Ground, Maryland 21005-5066, USA
| | | | | | | |
Collapse
|
27
|
Langeloth M, Masubuchi Y, Böhm MC, Müller-Plathe F. Recovering the reptation dynamics of polymer melts in dissipative particle dynamics simulations via slip-springs. J Chem Phys 2013; 138:104907. [DOI: 10.1063/1.4794156] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
Abstract
This chapter provides a primer on theories for coarse-grained (CG) modeling and, in particular, reviews several systematic methods for determining effective potentials for CG models. The chapter first reviews a statistical mechanics framework for relating atomistic and CG models. This framework naturally leads to a quantitative criterion for CG models that are "consistent" with a particular atomistic model for the same system. This consistency criterion is equivalent to minimizing the relative entropy between the two models. This criterion implies that a many-body PMF is the appropriate potential for a CG model that is consistent with a particular atomistic model. This chapter then presents a unified exposition of the theory and numerical methods for several approaches for approximating this many-body PMF. Finally, this chapter closes with a brief discussion of a few of the outstanding challenges facing the field of systematic coarse-graining.
Collapse
Affiliation(s)
- W G Noid
- Department of Chemistry, The Pennsylvania State University, University Park, PA, USA
| |
Collapse
|
29
|
Bayramoglu B, Faller R. Coarse-Grained Modeling of Polystyrene in Various Environments by Iterative Boltzmann Inversion. Macromolecules 2012. [DOI: 10.1021/ma301280b] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Beste Bayramoglu
- Department of Chemical Engineering & Materials Science, University of California Davis, Davis, California 95616, United States
| | - Roland Faller
- Department of Chemical Engineering & Materials Science, University of California Davis, Davis, California 95616, United States
| |
Collapse
|
30
|
Chang WY, Chang RY. Shear rate dependence of free energy barrier height for phenyl ring rotations in polystyrene based on non-equilibrium molecular dynamics simulations. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2012.696639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
31
|
Abstract
The extreme sensitivity of rheology to the microstructure of polymer melts has prompted the development of “analytical rheology,” which seeks inferring the structure and composition of an unknown sample based on rheological measurements. Typically, this involves the inversion of a model, which may be mathematical, computational, or completely empirical. Despite the imperfect state of existing models, analytical rheology remains a practically useful enterprise. I review its successes and failures in inferring the molecular weight distribution of linear polymers and the branching content in branched polymers.
Collapse
Affiliation(s)
- Sachin Shanbhag
- Department of Scientific Computing, Florida State University, Tallahassee, FL 32306, USA
| |
Collapse
|
32
|
Karimi-Varzaneh HA, van der Vegt NFA, Müller-Plathe F, Carbone P. How Good Are Coarse-Grained Polymer Models? A Comparison for Atactic Polystyrene. Chemphyschem 2012; 13:3428-39. [DOI: 10.1002/cphc.201200111] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 05/09/2012] [Indexed: 02/02/2023]
|
33
|
Wang Z, Likhtman AE, Larson RG. Segmental Dynamics in Entangled Linear Polymer Melts. Macromolecules 2012. [DOI: 10.1021/ma202759v] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zuowei Wang
- School of Mathematical
and Physical
Sciences, University of Reading, Whiteknights,
Reading RG6 6AX, United Kingdom
| | - Alexei E. Likhtman
- School of Mathematical
and Physical
Sciences, University of Reading, Whiteknights,
Reading RG6 6AX, United Kingdom
| | - Ronald G. Larson
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136,
United States
| |
Collapse
|
34
|
Rossi G, Elliott IG, Ala-Nissila T, Faller R. Molecular Dynamics Study of a MARTINI Coarse-Grained Polystyrene Brush in Good Solvent: Structure and Dynamics. Macromolecules 2011. [DOI: 10.1021/ma201980k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giulia Rossi
- Department of Applied Physics, Aalto University School of Science, P.O. Box 11000, FI-00076 AALTO, Finland
| | - Ian G. Elliott
- Department of Chemical Engineering & Materials Science, University of California at Davis, One Shields Ave, Davis, California 95616, United States
| | - Tapio Ala-Nissila
- Department of Applied Physics, Aalto University School of Science, P.O. Box 11000, FI-00076 AALTO, Finland
- Department of Physics, Brown University, P.O. Box 1843, Providence, Rhode Island 02912-1843, United States
| | - Roland Faller
- Department of Chemical Engineering & Materials Science, University of California at Davis, One Shields Ave, Davis, California 95616, United States
| |
Collapse
|
35
|
Ghanbari A, Ndoro TVM, Leroy F, Rahimi M, Böhm MC, Müller-Plathe F. Interphase Structure in Silica–Polystyrene Nanocomposites: A Coarse-Grained Molecular Dynamics Study. Macromolecules 2011. [DOI: 10.1021/ma202044e] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Azadeh Ghanbari
- Eduard-Zintl-Institut für Anorganische und Physikalische
Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Tinashe V. M. Ndoro
- Eduard-Zintl-Institut für Anorganische und Physikalische
Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Frédéric Leroy
- Eduard-Zintl-Institut für Anorganische und Physikalische
Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Mohammad Rahimi
- Eduard-Zintl-Institut für Anorganische und Physikalische
Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Michael C. Böhm
- Eduard-Zintl-Institut für Anorganische und Physikalische
Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische
Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| |
Collapse
|
36
|
Padding JT, Briels WJ. Systematic coarse-graining of the dynamics of entangled polymer melts: the road from chemistry to rheology. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:233101. [PMID: 21613700 DOI: 10.1088/0953-8984/23/23/233101] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
For optimal processing and design of entangled polymeric materials it is important to establish a rigorous link between the detailed molecular composition of the polymer and the viscoelastic properties of the macroscopic melt. We review current and past computer simulation techniques and critically assess their ability to provide such a link between chemistry and rheology. We distinguish between two classes of coarse-graining levels, which we term coarse-grained molecular dynamics (CGMD) and coarse-grained stochastic dynamics (CGSD). In CGMD the coarse-grained beads are still relatively hard, thus automatically preventing bond crossing. This also implies an upper limit on the number of atoms that can be lumped together (up to five backbone carbon atoms) and therefore on the longest chain lengths that can be studied. To reach a higher degree of coarse-graining, in CGSD many more atoms are lumped together (more than ten backbone carbon atoms), leading to relatively soft beads. In that case friction and stochastic forces dominate the interactions, and action must be undertaken to prevent bond crossing. We also review alternative methods that make use of the tube model of polymer dynamics, by obtaining the entanglement characteristics through a primitive path analysis and by simulation of a primitive chain network. We finally review super-coarse-grained methods in which an entire polymer is represented by a single particle, and comment on ways to include memory effects and transient forces.
Collapse
Affiliation(s)
- J T Padding
- Institut de la Matière Condensée et des Nanosciences, Université Catholique de Louvain, Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium.
| | | |
Collapse
|
37
|
Ghanbari A, Böhm MC, Müller-Plathe F. A Simple Reverse Mapping Procedure for Coarse-Grained Polymer Models with Rigid Side Groups. Macromolecules 2011. [DOI: 10.1021/ma2005958] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Azadeh Ghanbari
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Michael C. Böhm
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie and Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| |
Collapse
|
38
|
Gniewek P, Kolinski A. Note: A simple picture of subdiffusive polymer motion from stochastic simulations. J Chem Phys 2011; 134:056101. [DOI: 10.1063/1.3552233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
39
|
Bayramoglu B, Faller R. Structural properties of polystyrene oligomers in different environments: a molecular dynamics study. Phys Chem Chem Phys 2011; 13:18107-14. [DOI: 10.1039/c1cp21724k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Farah K, Fogarty AC, Böhm MC, Müller-Plathe F. Temperature dependence of coarse-grained potentials for liquid hexane. Phys Chem Chem Phys 2011; 13:2894-902. [DOI: 10.1039/c0cp01333a] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
Tikhomirov VA, Odinokov AV, Bagatur’yants AA, Alfimov MV. Modeling the surface of polystyrene and the adsorption of dye molecules on this surface. THEOR EXP CHEM+ 2011. [DOI: 10.1007/s11237-011-9164-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
42
|
Fritz D, Koschke K, Harmandaris VA, van der Vegt NFA, Kremer K. Multiscale modeling of soft matter: scaling of dynamics. Phys Chem Chem Phys 2011; 13:10412-20. [DOI: 10.1039/c1cp20247b] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
43
|
Coarse-Grained Modeling for Macromolecular Chemistry. MULTISCALE MOLECULAR METHODS IN APPLIED CHEMISTRY 2011; 307:295-321. [DOI: 10.1007/128_2010_122] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
44
|
Farah K, Karimi-Varzaneh HA, Müller-Plathe F, Böhm MC. Reactive Molecular Dynamics with Material-Specific Coarse-Grained Potentials: Growth of Polystyrene Chains from Styrene Monomers. J Phys Chem B 2010; 114:13656-66. [DOI: 10.1021/jp107001e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karim Farah
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Hossein A. Karimi-Varzaneh
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - Michael C. Böhm
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| |
Collapse
|
45
|
Goswami M, Sumpter BG. Anomalous chain diffusion in polymer nanocomposites for varying polymer-filler interaction strengths. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:041801. [PMID: 20481738 DOI: 10.1103/physreve.81.041801] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 12/17/2009] [Indexed: 05/29/2023]
Abstract
Anomalous diffusion of polymer chains in a polymer nanocomposite melt is investigated for different polymer-nanoparticle interaction strengths using stochastic molecular dynamics simulations. For spherical nanoparticles dispersed in a polymer matrix the results indicate that the chain motion exhibits three distinct regions of diffusion, the Rouse-like motion, an intermediate subdiffusive regime followed by a normal Fickian diffusion. The motion of the chain end monomers shows a scaling that can be attributed to the formation of strong "networklike" structures, which have been seen in a variety of polymer nanocomposite systems. Irrespective of the polymer-particle interaction strengths, these three regimes seem to be present with small deviations. Further investigation on dynamic structure factor shows that the deviations simply exist due to the presence of strong enthalpic interactions between the monomers with the nanoparticles, albeit preserving the anomaly in the chain diffusion. The time-temperature superposition principle is also tested for this system and shows a striking resemblance with systems near glass transition and biological systems with molecular crowding. The universality class of the problem can be enormously important in understanding materials with strong affinity to form either a glass, a gel or networklike structures.
Collapse
Affiliation(s)
- Monojoy Goswami
- Computational Chemical Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
| | | |
Collapse
|
46
|
Haung Z, Ji H, Mays J, Dadmun M, Smith G, Bedrov D, Zhang Y. Polymer loop formation on a functionalized hard surface: quantitative insight by comparison of experimental and Monte Carlo simulation results. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:202-209. [PMID: 20038168 DOI: 10.1021/la902012z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polystyrene terminated with carboxylic acid end groups (telechelic polymer) was grafted from the melt onto a silicon wafer that contained a monolayer of epoxy groups. Ellipsometry and fluorimetry were employed to monitor the kinetics of the grafting and loop formation, respectively. These results are quantitatively correlated with bond fluctuation Monte Carlo (BFMC) simulations that model the grafting and loop formation process. The quantitative correlation found between experiment and simulation provides unique insight into the process of polymer loop formation. Specifically, this correlation provides a calibration of the fluorescence intensity to the amount of singly bound chains present on the surface, revealing that about 80% of the bound chains form loops on the surface at the longest reaction time studied, and provides the time evolution of singly and doubly bound chains during the reaction. Moreover, this correlation is broadly applicable and can be used to readily monitor the impact of a broad range of reaction conditions (e.g., temperature, telechelic concentration, surface density of functional groups) on the loop formation process. This correlation, therefore, provides a method to access fundamental information that is not accessible by experiment alone and yet is required to tailor surface properties through adjusting the coverage and fraction of loops in the grafted layer and to correlate surface-sensitive properties to specific grafted layer structure.
Collapse
Affiliation(s)
- Zhenyu Haung
- Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996, USA
| | | | | | | | | | | | | |
Collapse
|
47
|
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]
|
48
|
Ell JR, Mulder DE, Faller R, Patten TE, Kuhl TL. Structural Determination of High Density, ATRP Grown Polystyrene Brushes by Neutron Reflectivity. Macromolecules 2009. [DOI: 10.1021/ma901239d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John R. Ell
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003
| | - Dennis E. Mulder
- Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
| | - Roland Faller
- Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
| | - Timothy E. Patten
- Department of Chemistry, University of California, Davis, California 95616
| | - Tonya L. Kuhl
- Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
| |
Collapse
|
49
|
Fritz D, Harmandaris VA, Kremer K, van der Vegt NFA. Coarse-Grained Polymer Melts Based on Isolated Atomistic Chains: Simulation of Polystyrene of Different Tacticities. Macromolecules 2009. [DOI: 10.1021/ma901242h] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Dominik Fritz
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany
| | | | - Kurt Kremer
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany
| | | |
Collapse
|
50
|
Abstract
The multiscale coarse-graining (MS-CG) approach developed in our previous work is extended here to model solvent-free lipid bilayers. The water (solvent) molecules are completely integrated out of the coarse-grained (CG) effective force field. The MS-CG potential, a sum of pairwise central terms, accurately approximates the many-body potential of mean force in the coarse-grained coordinates. It thus incorporates both energetic and entropic contributions. To improve the stability and elastic properties of the MS-CG simulated bilayer, an additional constraint was adopted: the partial virial associated with CG bilayer sites was matched to its corresponding atomistic value for each configuration of the system. The resulting solvent-free MS-CG model reproduces a liquid-state lipid bilayer with accurate structural and elastic properties. Finally, the solvent-free MS-CG model is used to simulate a very large, flat bilayer and two liposome geometries, demonstrating its greatly enhanced computational efficiency.
Collapse
Affiliation(s)
- Sergei Izvekov
- Department of Chemistry and Center for Biophysical Modeling and Simulation, University of Utah, Salt Lake City, 84112-0850, USA
| | | |
Collapse
|