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Eghlidos O, Oswald J. Derived Coarse-Grained Potentials for Semicrystalline Polymers with a Blended Multistate Iterative Boltzmann Inversion Method. J Chem Theory Comput 2023; 19:9445-9456. [PMID: 38083860 DOI: 10.1021/acs.jctc.3c00935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
In this article, we employ the multistate iterative Boltzmann inversion (MS-IBI) method to develop coarse-grained potentials capable of representing molecular structure in both the amorphous and crystalline phases of semicrystalline polymers with improved accuracy while allowing for tunable control over the dynamics governing the α-relaxation process. A unique feature of this method is that the potentials are blended using the product of the target structural distributions, for example, the radial density function, for each phase and a weighting factor. To demonstrate this approach, a family of potentials for polyethylene is developed where the weighting factor of the crystalline phase ranges is varied from zero, incorporating information only from the amorphous phase, to unity, where the model is trained from only the crystalline phase. The most accurate representation of structural distributions was obtained when the crystalline phases is weighted at 50%. However, we show that when the crystalline phase is weighted at 90%, the model more accurately represents dynamics of the α-relaxation process, with realistic predicted values of activation energy and diffusion rates, with relatively minor impact on accuracy in structure.
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Affiliation(s)
- Omid Eghlidos
- School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Jay Oswald
- School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287, United States
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2
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Investigating the molecular origins of deformation in polyurea. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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3
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Micro-mechanical properties of foamed polymer rehabilitation material: A molecular dynamics study. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Polyurea for Blast and Impact Protection: A Review. Polymers (Basel) 2022; 14:polym14132670. [PMID: 35808715 PMCID: PMC9269495 DOI: 10.3390/polym14132670] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 12/10/2022] Open
Abstract
Polyurea has attracted extensive attention from researchers and engineers in the field of blast and impact protection due to its excellent quasi-static mechanical properties and dynamic mechanical properties. Its mechanical properties and energy absorption capacity have been tuned by means of formulation optimization, molecular dynamics (MD) simulation and the addition of reinforcing materials. Owing to the special molecular structure of polyurea, the mechanism of polyurea protection against blasts and impacts is the simultaneous effect of multiple properties. For different substrates and structures, polyurea needs to provide different performance characteristics, including adhesion, hardness, breaking elongation, etc., depending on the characteristics of the load to which it is subjected. The current article reviews relevant publications in the field of polyurea blast and impact protection, including material optimization, protection mechanisms and applications in blast and impact protection.
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Synthesis of sugar gourd-like metal organic framework-derived hollow nanocages nickel molybdate@cobalt-nickel layered double hydroxide for flame retardant polyurea. J Colloid Interface Sci 2022; 616:234-245. [DOI: 10.1016/j.jcis.2022.01.101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 01/15/2022] [Accepted: 01/17/2022] [Indexed: 01/10/2023]
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6
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Chen J, Li C, Jia H, Shen Z, Zhao R, Su T, Xiang B, Wang X, Boukhvalov DW, Luo Z, Luo Y. Novel Molecular-Level Insight into the Self-Healing Behavior and Mechanism of Polyurethane-Urea Elastomer Based on a Noncovalent Strategy. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00608] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jialiang Chen
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Chichao Li
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Huan Jia
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Zhihua Shen
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Rong Zhao
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Tao Su
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Bo Xiang
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Xiujuan Wang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China
| | | | - Zhenyang Luo
- College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Yanlong Luo
- College of Science, Nanjing Forestry University, Nanjing 210037, China
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Zheng T, Li T, Shi J, Wu T, Zhuang Z, Xu J, Guo B. Molecular Insight into the Toughness of Polyureas: A Hybrid All-Atom/Coarse-Grained Molecular Dynamics Study. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02453] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tianze Zheng
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Ting Li
- Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China
| | - Jiaxin Shi
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Tianyu Wu
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Zhuo Zhuang
- School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
| | - Jun Xu
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Baohua Guo
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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8
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Zhu C, Wei N, Zhao J. Coarse-Grained Potentials of Poly(vinyl alcohol)/Graphene Oxide Interfaces. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chunhua Zhu
- Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Ning Wei
- Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Junhua Zhao
- Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, P. R. China
- Institute of Mechanics and Advanced Materials, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, P. R. China
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Zheng T, Zhang Y, Shi J, Xu J, Guo B. Revealing the role of hydrogen bonding in polyurea with multiscale simulations. MOLECULAR SIMULATION 2021. [DOI: 10.1080/08927022.2021.1967346] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Tianze Zheng
- Advanced Materials Laboratory of Ministry of Education (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, People’s Republic of China
| | - Yao Zhang
- Advanced Materials Laboratory of Ministry of Education (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, People’s Republic of China
| | - Jiaxin Shi
- Advanced Materials Laboratory of Ministry of Education (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, People’s Republic of China
| | - Jun Xu
- Advanced Materials Laboratory of Ministry of Education (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, People’s Republic of China
| | - Baohua Guo
- Advanced Materials Laboratory of Ministry of Education (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, People’s Republic of China
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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.
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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
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Johnson LC, Phelan FR. Dynamically consistent coarse-grain simulation model of chemically specific polymer melts via friction parameterization. J Chem Phys 2021; 154:084114. [PMID: 33639746 PMCID: PMC10075510 DOI: 10.1063/5.0034910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Coarse-grained (CG) models of polymers involve grouping many atoms in an all-atom (AA) representation into single sites to reduce computational effort yet retain the hierarchy of length and time scales inherent to macromolecules. Parameterization of such models is often via "bottom-up" methods, which preserve chemical specificity but suffer from artificially accelerated dynamics with respect to the AA model from which they were derived. Here, we study the combination of a bottom-up CG model with a dissipative potential as a means to obtain a chemically specific and dynamically correct model. We generate the conservative part of the force-field using the iterative Boltzmann inversion (IBI) method, which seeks to recover the AA structure. This is augmented with the dissipative Langevin thermostat, which introduces a single parameterizable friction factor to correct the unphysically fast dynamics of the IBI-generated force-field. We study this approach for linear polystyrene oligomer melts for three separate systems with 11, 21, and 41 monomers per chain and a mapping of one monomer per CG site. To parameterize the friction factor, target values are extracted from the AA dynamics using translational monomer diffusion, translational chain diffusion, and rotational chain motion to test the consistency of the parameterization across different modes of motion. We find that the value of the friction parameter needed to bring the CG dynamics in line with AA target values varies based on the mode of parameterization with short-time monomer translational dynamics requiring the highest values, long-time chain translational dynamics requiring the lowest values, and rotational dynamics falling in between. The friction ranges most widely for the shortest chains, and the span narrows with increasing chain length. For longer chains, a practical working value of the friction parameter may be derived from the rotational dynamics, owing to the contribution of multiple relaxation modes to chain rotation and a lack of sensitivity of the translational dynamics at these intermediate levels of friction. A study of equilibrium chain structure reveals that all chains studied are non-Gaussian. However, longer chains better approximate ideal chain dimensions than more rod-like shorter chains and thus are most closely described by a single friction parameter. We also find that the separability of the conservative and dissipative potentials is preserved.
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Affiliation(s)
- Lilian C Johnson
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Frederick R Phelan
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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Eastmond T, Hu J, Alizadeh V, Hrubiak R, Oswald J, Amirkhizi A, Peralta P. Probing High-Pressure Structural Evolution in Polyurea with In Situ Energy-Dispersive X-ray Diffraction and Molecular Dynamics Simulations. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02266] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tyler Eastmond
- Mechanical and Aerospace Engineering, Arizona State University, 501 E Tyler Mall, Tempe, Arizona 85287, United States
| | - Jing Hu
- Mechanical and Aerospace Engineering, Arizona State University, 501 E Tyler Mall, Tempe, Arizona 85287, United States
| | - Vahidreza Alizadeh
- Department of Mechanical Engineering, University of Massachusetts Lowell, Dandeneau Hall
219, 1 University Ave, Lowell, Massachusetts 01854, United States
| | - Rostislav Hrubiak
- High Pressure Collaborative Access Team, X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Jay Oswald
- Mechanical and Aerospace Engineering, Arizona State University, 501 E Tyler Mall, Tempe, Arizona 85287, United States
| | - Alireza Amirkhizi
- Department of Mechanical Engineering, University of Massachusetts Lowell, Dandeneau Hall
219, 1 University Ave, Lowell, Massachusetts 01854, United States
| | - Pedro Peralta
- Mechanical and Aerospace Engineering, Arizona State University, 501 E Tyler Mall, Tempe, Arizona 85287, United States
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