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Smirnov MA, Tolmachev DA, Glova AD, Sokolova MP, Geydt PV, Lukasheva NV, Lyulin SV. Combined Use of Atomic Force Microscopy and Molecular Dynamics in the Study of Biopolymer Systems. POLYMER SCIENCE SERIES C 2021. [DOI: 10.1134/s1811238221020089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Wen C, Odle R, Cheng S. Coarse-Grained Molecular Dynamics Modeling of a Branched Polyetherimide. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c01440] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Chengyuan Wen
- Department of Physics, Center for Soft Matter and Biological Physics, and Macromolecules Innovation Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Roy Odle
- SABIC, 1 Lexan Lane, Mt. Vernon, Indiana 47620, United States
| | - Shengfeng Cheng
- Department of Physics, Center for Soft Matter and Biological Physics, and Macromolecules Innovation Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
- Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
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Glova A, Larin SV, Nazarychev VM, Kenny JM, Lyulin AV, Lyulin SV. Toward Predictive Molecular Dynamics Simulations of Asphaltenes in Toluene and Heptane. ACS OMEGA 2019; 4:20005-20014. [PMID: 31788635 PMCID: PMC6882142 DOI: 10.1021/acsomega.9b02992] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
The conventional definition of asphaltenes is based on their solubility in toluene and their insolubility in heptane. We have utilized this definition to study the influence of partial charge parametrization on the aggregation behavior of asphaltenes using classical atomistic molecular dynamics simulations performed on the microsecond time scale. Under consideration here are toluene- and heptane-based systems with different partial charges parametrized using the general AMBER force field (GAFF). Systems with standard GAFF partial charges calculated by the AM1-BCC and HF/6-31G*(RESP) methods were simulated alongside systems without partial charges. The partial charges implemented differ in terms of the resulting electrical negativity of the asphaltene polyaromatic core, with the AM1-BCC method giving the greatest magnitude of the total core charge. Based on our analysis of the molecular relaxation and orientation, and on the aggregation behavior of asphaltenes in toluene and heptane, we proposed to use the partial charges obtained by the AM1-BCC method for the study of asphaltene aggregates. A good agreement with available experimental data was observed on the sizes of the aggregates, their fractal dimensions, and the solvent entrainment for the model asphaltenes in toluene and heptane. From the results obtained, we conclude that for a better predictive ability, simulation parameters must be carefully chosen, with particular attention paid to the partial charges owing to their influence on the electrical negativity of the asphaltene core and on the asphaltenes aggregation.
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Affiliation(s)
- Artyom
D. Glova
- Institute
of Macromolecular Compounds, Russian Academy
of Sciences, Bolshoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - Sergey V. Larin
- Institute
of Macromolecular Compounds, Russian Academy
of Sciences, Bolshoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - Victor M. Nazarychev
- Institute
of Macromolecular Compounds, Russian Academy
of Sciences, Bolshoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - Josè M. Kenny
- Institute
of Macromolecular Compounds, Russian Academy
of Sciences, Bolshoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - Alexey V. Lyulin
- Institute
of Macromolecular Compounds, Russian Academy
of Sciences, Bolshoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
- Theory
of Polymers and Soft Matter Group, Technische
Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Sergey V. Lyulin
- Institute
of Macromolecular Compounds, Russian Academy
of Sciences, Bolshoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
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Volgin IV, Andreeva MV, Larin SV, Didenko AL, Vaganov GV, Borisov IL, Volkov AV, Klushin LI, Lyulin SV. Transport Properties of Thermoplastic R-BAPB Polyimide: Molecular Dynamics Simulations and Experiment. Polymers (Basel) 2019; 11:E1775. [PMID: 31671839 PMCID: PMC6918166 DOI: 10.3390/polym11111775] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/21/2019] [Accepted: 10/25/2019] [Indexed: 01/18/2023] Open
Abstract
The present work evaluates the transport properties of thermoplastic R-BAPB polyimide based on 1,3-bis(3,3',4,4'-dicarboxyphenoxy)benzene (dianhydride R) and 4,4'-bis(4-aminophenoxy)biphenyl (diamine BAPB). Both experimental studies and molecular dynamics simulations were applied to estimate the diffusion coefficients and solubilities of various gases, such as helium (He), oxygen (O2), nitrogen (N2), and methane (CH4). The validity of the results obtained was confirmed by studying the correlation of the experimental solubilities and diffusion coefficients of He, O2, and N2 in R-BAPB, with their critical temperatures and the effective sizes of the gas molecules, respectively. The solubilities obtained in the molecular dynamics simulations are in good quantitative agreement with the experimental data. A good qualitative relationship between the simulation results and the experimental data is also observed when comparing the diffusion coefficients of the gases. Analysis of the Robeson plots shows that R-BAPB has high selectivity for He, N2, and CO2 separation from CH4, which makes it a promising polymer for developing gas-separation membranes. From this point of view, the simulation models developed and validated in the present work may be put to effective use for further investigations into the transport properties of R-BAPB polyimide and nanocomposites based on it.
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Affiliation(s)
- Igor V Volgin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
| | - Maria V Andreeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
| | - Sergey V Larin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
| | - Andrey L Didenko
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
| | - Gleb V Vaganov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
| | - Ilya L Borisov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky pr., 29, 119991 Moscow, Russia.
| | - Alexey V Volkov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky pr., 29, 119991 Moscow, Russia.
| | - Leonid I Klushin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
- Department of Physics, American University of Beirut, P.O. Box 11-0236, Beirut 1107 2020, Lebanon.
| | - Sergey V Lyulin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O., 31, 199004 St. Petersburg, Russia.
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5
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Volgin IV, Larin SV, Lyulin SV. Diffusion of Nanoparticles in Polymer Systems. POLYMER SCIENCE SERIES C 2018. [DOI: 10.1134/s1811238218020212] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Volgin I, Larin S, Lyulin A, Lyulin S. Coarse-grained molecular-dynamics simulations of nanoparticle diffusion in polymer nanocomposites. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Nazarychev VM, Larin SV, Lyulin AV, Dingemans T, Kenny JM, Lyulin SV. Atomistic Molecular Dynamics Simulations of the Initial Crystallization Stage in an SWCNT-Polyetherimide Nanocomposite. Polymers (Basel) 2017; 9:polym9100548. [PMID: 30965851 PMCID: PMC6418835 DOI: 10.3390/polym9100548] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 10/13/2017] [Accepted: 10/19/2017] [Indexed: 01/23/2023] Open
Abstract
Crystallization of all-aromatic heterocyclic polymers typically results in an improvement of their thermo-mechanical properties. Nucleation agents may be used to promote crystallization, and it is well known that the incorporation of nanoparticles, and in particular carbon-based nanofillers, may induce or accelerate crystallization through nucleation. The present study addresses the structural properties of polyetherimide-based nanocomposites and the initial stages of polyetherimide crystallization as a result of single-walled carbon nanotube (SWCNT) incorporation. We selected two amorphous thermoplastic polyetherimides ODPA-P3 and aBPDA-P3 based on 3,3′,4,4′-oxydiphthalic dianhydride (ODPA), 2,3′,3,4′-biphenyltetracarboxylic dianhydride (aBPDA) and diamine 1,4-bis[4-(4-aminophenoxy)phenoxy]benzene (P3) and simulated the onset of crystallization in the presence of SWCNTs using atomistic molecular dynamics. For ODPA-P3, we found that the planar phthalimide and phenylene moieties show pronounced ordering near the CNT (carbon nanotube) surface, which can be regarded as the initial stage of crystallization. We will discuss two possible mechanisms for ODPA-P3 crystallization in the presence of SWCNTs: the spatial confinement caused by the CNTs and π–π interactions at the CNT-polymer matrix interface. Based on our simulation results, we propose that ODPA-P3 crystallization is most likely initiated by favorable π–π interactions between the carbon nanofiller surface and the planar ODPA-P3 phthalimide and phenylene moieties.
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Affiliation(s)
- Victor M Nazarychev
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol'shoi pr. 31 (V.O.), St. Petersburg 199004, Russia.
| | - Sergey V Larin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol'shoi pr. 31 (V.O.), St. Petersburg 199004, Russia.
| | - Alexey V Lyulin
- Theory of Polymers and Soft Matter Group, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
| | - Theo Dingemans
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Murray Hall 1113, 121 South Road, Chapel Hill, NC 27599-3050, USA.
| | - Jose M Kenny
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol'shoi pr. 31 (V.O.), St. Petersburg 199004, Russia.
- Materials Science and Technology Centre, University of Perugia, Loc. Pentima, 4, 05100 Terni, Italy.
| | - Sergey V Lyulin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol'shoi pr. 31 (V.O.), St. Petersburg 199004, Russia.
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Volgin IV, Larin SV, Abad E, Lyulin SV. Molecular Dynamics Simulations of Fullerene Diffusion in Polymer Melts. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02050] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Igor V. Volgin
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bolshoj
pr. V.O., 31, 199004 Saint Petersburg, Russia
| | - Sergey V. Larin
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bolshoj
pr. V.O., 31, 199004 Saint Petersburg, Russia
| | - Enrique Abad
- Departamento
de Física Aplicada and Instituto de Computación Científica
Avanzada (ICCAEX), Centro Universitario de Mérida, Universidad de Extremadura, E-06800 Mérida, Spain
| | - Sergey V. Lyulin
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bolshoj
pr. V.O., 31, 199004 Saint Petersburg, Russia
- Physical
Faculty, Saint-Petersburg University, Ulyanovskaya str. 1, 198504 Petrodvorets, Russia
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10
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Nazarychev VM, Lyulin AV, Larin SV, Gofman IV, Kenny JM, Lyulin SV. Correlation between the High-Temperature Local Mobility of Heterocyclic Polyimides and Their Mechanical Properties. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00602] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Victor M. Nazarychev
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - Alexey V. Lyulin
- Theory
of Polymers and Soft Matter Group, Technische Universiteit Eindhoven, PO Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Sergey V. Larin
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - Iosif V. Gofman
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
| | - José M. Kenny
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
- Materials
Science and Technology Centre, University of Perugia, Loc. Pentima,
4, 05100 Terni, Italy
| | - Sergey V. Lyulin
- Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi
pr. 31 (V.O.), 199004 St. Petersburg, Russia
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Lyulin SV, Larin SV, Nazarychev VM, Fal’kovich SG, Kenny JM. Multiscale computer simulation of polymer nanocomposites based on thermoplastics. POLYMER SCIENCE SERIES C 2016. [DOI: 10.1134/s1811238216010082] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nazarychev VM, Lyulin AV, Larin SV, Gurtovenko AA, Kenny JM, Lyulin SV. Molecular dynamics simulations of uniaxial deformation of thermoplastic polyimides. SOFT MATTER 2016; 12:3972-3981. [PMID: 27033967 DOI: 10.1039/c6sm00230g] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The results of atomistic molecular-dynamics simulations of mechanical properties of heterocyclic polymer subjected to uniaxial deformation are reported. A new amorphous thermoplastic polyimide R-BAPO with a repeat unit consisting of dianhydride 1,3-bis-(3',4,-dicarboxyphenoxy)diphenyl (dianhydride R) and diamine 4,4'-bis-(4''-aminophenoxy)diphenyloxide (diamine BAPO) was chosen for the simulations. Our primary goal was to establish the impact of various factors (sample preparation method, molecular mass, and cooling and deformation rates) on the elasticity modulus. In particular, we found that the elasticity modulus was only slightly affected by the degree of equilibration, the molecular mass and the size of the simulation box. This is most likely due to the fact that the main contribution to the elasticity modulus is from processes on scales smaller than the entanglement length. Essentially, our simulations reproduce the logarithmic dependence of the elasticity modulus on cooling and deformation rates, which is normally observed in experiments. With the use of the temperature dependence analysis of the elasticity modulus we determined the flow temperature of R-BAPO to be 580 K in line with the experimental data available. Furthermore, we found that the application of high external pressure to the polymer sample during uniaxial deformation can improve the mechanical properties of the polyimide. Overall, the results of our simulations clearly demonstrate that atomistic molecular-dynamics simulations represent a powerful and accurate tool for studying the mechanical properties of heterocyclic polymers and can therefore be useful for the virtual design of new materials, thereby supporting cost-effective synthesis and experimental research.
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Affiliation(s)
- V M Nazarychev
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol'shoi pr. 31 (V.O.), St. Petersburg, 199004, Russia.
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Okatova OV, Didenko AL, Svetlichnyi VM, Pavlov GM. Hydrodynamic, molecular, and conformational characteristics of poly[1,3-bis(3′,4-dicarboxyphenoxy)benzene 4,4′-bis(4″-N-phenoxy)-diphenylsulfone]imide in solutions. POLYMER SCIENCE SERIES A 2016. [DOI: 10.1134/s0965545x16010089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nazarychev VM, Larin SV, Yakimansky AV, Lukasheva NV, Gurtovenko AA, Gofman IV, Yudin VE, Svetlichnyi VM, Kenny JM, Lyulin SV. Parameterization of electrostatic interactions for molecular dynamics simulations of heterocyclic polymers. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23715] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Victor M. Nazarychev
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
| | - Sergey V. Larin
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
| | - Alexander V. Yakimansky
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
- Saint-Petersburg National Research University of Information Technologies, Mechanics, and Optics; Kronverkskii pr., 49 St. Petersburg 197101 Russia
| | - Natalia V. Lukasheva
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
| | - Andrey A. Gurtovenko
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
- Department of Physics; St. Petersburg State University; Ul'yanovskaya str. 1 Petrodvorets St. Petersburg 198504 Russia
| | - Iosif V. Gofman
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
| | - Vladimir E. Yudin
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
- St.Petersburg State Polytechnic University; Polytechnicheskaya str. 29, St.Petersburg 195251 Russia
| | - Valentin M. Svetlichnyi
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
| | - Jose M. Kenny
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
| | - Sergey V. Lyulin
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoi pr. 31 (V.O.) St. Petersburg 199004 Russia
- Department of Physics; St. Petersburg State University; Ul'yanovskaya str. 1 Petrodvorets St. Petersburg 198504 Russia
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Larin SV, Glova AD, Serebryakov EB, Nazarychev VM, Kenny JM, Lyulin SV. Influence of the carbon nanotube surface modification on the microstructure of thermoplastic binders. RSC Adv 2015. [DOI: 10.1039/c5ra07851b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The structural properties of polymer nanocomposites based on thermoplastic polyimides filled with surface-modified carbon nanotubes (CNT) have been studied by means of fully-atomistic molecular-dynamics simulations.
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Affiliation(s)
- S. V. Larin
- Institute of Macromolecular Compounds
- Russian Academy of Sciences
- St. Petersburg
- Russia
| | - A. D. Glova
- Department of Physics
- St. Petersburg State University
- St. Petersburg
- Russia
| | - E. B. Serebryakov
- Department of Physics
- St. Petersburg State University
- St. Petersburg
- Russia
| | - V. M. Nazarychev
- Institute of Macromolecular Compounds
- Russian Academy of Sciences
- St. Petersburg
- Russia
| | - J. M. Kenny
- Institute of Macromolecular Compounds
- Russian Academy of Sciences
- St. Petersburg
- Russia
- Materials Science and Technology Centre
| | - S. V. Lyulin
- Institute of Macromolecular Compounds
- Russian Academy of Sciences
- St. Petersburg
- Russia
- Department of Physics
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Fal’kovich SG, Larin SV, Nazarychev VM, Volgin IV, Gurtovenko AA, Lyulin AV, Lyulin SV. Computer simulation of the heat-resistant polyimides ULTEM™ and EXTEM™ with the use of GROMOS53a6 and AMBER99 force fields. POLYMER SCIENCE SERIES A 2014. [DOI: 10.1134/s0965545x14040063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lyulin SV, Larin SV, Gurtovenko AA, Nazarychev VM, Falkovich SG, Yudin VE, Svetlichnyi VM, Gofman IV, Lyulin AV. Thermal properties of bulk polyimides: insights from computer modeling versus experiment. SOFT MATTER 2014; 10:1224-1232. [PMID: 24652462 DOI: 10.1039/c3sm52521j] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Due to the great importance for many industrial applications it is crucial from the point of view of theoretical description to reproduce thermal properties of thermoplastic polyimides as accurate as possible in order to establish "chemical structure-physical properties" relationships of new materials. In this paper we employ differential scanning calorimetry, dilatometry, and atomistic molecular dynamics (MD) simulations to explore whether the state-of-the-art computer modeling can serve as a precise tool for probing thermal properties of polyimides with highly polar groups. For this purpose the polyimide R-BAPS based on dianhydride 1,3-bis(3',4-dicarboxyphenoxy)benzene (dianhydride R) and diamine 4,4'-bis(4''-aminophenoxy)biphenyl sulphone) (diamine BAPS) was synthesized and extensively studied. Overall, our findings show that the widely used glass-transition temperature Tg evaluated from MD simulations should be employed with great caution for verification of the polyimide computational models against experimental data: in addition to the well-known impact of the cooling rate on the glass-transition temperature, correct definition of Tg requires cooling that starts from very high temperatures (no less than 800 K for considered polyimides) and accurate evaluation of the appropriate cooling rate, otherwise the errors in the measured values of Tg become undefined. In contrast to the glass-transition temperature, the volumetric coefficient of thermal expansion (CTE) does not depend on the cooling rate in the low-temperature domain (T < Tg) so that comparison of computational and experimental values of CTE provides a much safer way for proper validation of the theoretical model when electrostatic interactions are taken into account explicitly. Remarkably, this conclusion is most likely of generic nature: we show that it also holds for the commercial polyimide EXTEM, another polyimide with a similar chemical structure.
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Affiliation(s)
- Sergey V Lyulin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol'shoi pr. 31 (V.O.), St. Petersburg, 199004 Russia
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Falkovich SG, Lyulin SV, Nazarychev VM, Larin SV, Gurtovenko AA, Lukasheva NV, Lyulin AV. Influence of the electrostatic interactions on thermophysical properties of polyimides: Molecular-dynamics simulations. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/polb.23460] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Sergey V. Lyulin
- Institute of Macromolecular Compounds; 31, Bolshoi pr. Saint-Petersburg 199004 Russia
- Department of Physics; St. Petersburg State University, Ulyanovskaya Str. 1; Petrodvorets, St Petersburg 198504 Russia
| | - Victor M. Nazarychev
- Institute of Macromolecular Compounds; 31, Bolshoi pr. Saint-Petersburg 199004 Russia
| | - Sergey V. Larin
- Institute of Macromolecular Compounds; 31, Bolshoi pr. Saint-Petersburg 199004 Russia
| | - Andrey A. Gurtovenko
- Institute of Macromolecular Compounds; 31, Bolshoi pr. Saint-Petersburg 199004 Russia
- Department of Physics; St. Petersburg State University, Ulyanovskaya Str. 1; Petrodvorets, St Petersburg 198504 Russia
| | - Natalia V. Lukasheva
- Institute of Macromolecular Compounds; 31, Bolshoi pr. Saint-Petersburg 199004 Russia
| | - Alexey V. Lyulin
- Theory of Polymers and Soft Matter, Department of Applied Physics; Technische Universiteit Eindhoven; 5600 MB Eindhoven The Netherlands
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Larin SV, Falkovich SG, Nazarychev VM, Gurtovenko AA, Lyulin AV, Lyulin SV. Molecular-dynamics simulation of polyimide matrix pre-crystallization near the surface of a single-walled carbon nanotube. RSC Adv 2014. [DOI: 10.1039/c3ra45010d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Falkovich SG, Larin SV, Lyulin AV, Yudin VE, Kenny JM, Lyulin SV. Influence of the carbon nanofiller surface curvature on the initiation of crystallization in thermoplastic polymers. RSC Adv 2014. [DOI: 10.1039/c4ra07438f] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The segments of crystallizable polyimide tend to lay parallel to the graphene nanofiller surface and this tendency is stronger than for carbon nanotubes.
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Affiliation(s)
- S. G. Falkovich
- Institute of Macromolecular Compounds Russian Academy of Sciences
- St. Petersburg, Russian Federation
| | - S. V. Larin
- Institute of Macromolecular Compounds Russian Academy of Sciences
- St. Petersburg, Russian Federation
| | - A. V. Lyulin
- Department of Applied Physics Technische Universiteit Eindhoven
- Eindhoven, The Netherlands
| | - V. E. Yudin
- Institute of Macromolecular Compounds Russian Academy of Sciences
- St. Petersburg, Russian Federation
- St.Petersburg State Polytechnical University
- St. Petersburg, Russian Federation
| | - J. M. Kenny
- Institute of Macromolecular Compounds Russian Academy of Sciences
- St. Petersburg, Russian Federation
- Institute of Polymer Science and Technology - CSIC
- 28006 Madrid, Spain
| | - S. V. Lyulin
- Institute of Macromolecular Compounds Russian Academy of Sciences
- St. Petersburg, Russian Federation
- Department of Physics
- St. Petersburg State University
- St. Petersburg, Russian Federation
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