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Zhang Z, Fang Y, Chen Q, Duan P, Wu X, Zhang L, Wu W, Liu J. Molecular dynamics simulation of the impact of the surface topology of carbon black on the mechanical properties of elastomer nanocomposites. Phys Chem Chem Phys 2023; 25:5602-5612. [PMID: 36727525 DOI: 10.1039/d2cp04996a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Carbon black has always played a pivotal role in reinforcing elastomers because it remarkably improves the mechanical properties. The reinforcing effect of carbon black is influenced by its grades, which mainly depend on the difference in the structure of the carbon black particles. Despite many traditional experiments on the performance of carbon black composites, there has been less emphasis on reinforcement mechanisms due to the challenges associated with unraveling the intermolecular interactions. In this paper, a coarse grained molecular dynamics simulation was employed to examine the relationship between the morphology of the carbon black particles and the mechanical properties of the elastomer nanocomposites. Specifically, three different morphological carbon black nanoparticle models, including the smooth particle model, rough particle model, and the rough ellipsoid model, were constructed first. We then focused on investigating the changes of the mechanical properties by systematically varying the filling fraction of the carbon black particles, and the strength of the interfacial interaction between the filler and the rubber. The results indicated that the surface roughness and the filler's shape had a significant impact on the mechanical properties of the filled rubber models. The mechanical enhancement effect of the rough ellipsoidal carbon black is around 50-400% higher than that of the smooth carbon black, and the stronger the interfacial interactions, the more pronounced the enhancement. In addition, the rough ellipsoid filled system has low hysteresis, low permanent deformation, and high fatigue resistance. In general, this work explores the strengthening mechanism of carbon black on the elastomer at the molecular level and generates new insight into the design and fabrication of novel reinforcing fillers.
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Affiliation(s)
- Ziyi Zhang
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Yue Fang
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Qionghai Chen
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Pengwei Duan
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Xiaohui Wu
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China. .,Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing, 100029, China.,State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Liqun Zhang
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China. .,Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing, 100029, China.,State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Wenjie Wu
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China. .,Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing, 100029, China.,State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jun Liu
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, 100029, China. .,Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing, 100029, China.,State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
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2
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David A, Tartaglino U, Casalegno M, Raos G. Fracture in Silica/Butadiene Rubber: A Molecular Dynamics View of Design-Property Relationships. ACS POLYMERS AU 2021; 1:175-186. [PMID: 36855656 PMCID: PMC9954208 DOI: 10.1021/acspolymersau.1c00023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Despite intense investigation, the mechanisms governing the mechanical reinforcement of polymers by dispersed nanoparticles have only been partially clarified. This is especially true for the ultimate properties of the nanocomposites, which depend on their resistance to fracture at large deformations. In this work, we adopt molecular dynamics simulations to investigate the mechanical properties of silica/polybutadiene rubber, using a quasi-atomistic model that allows a meaningful description of bond breaking and fracture over relatively large length scales. The behavior of large nanocomposite models is explored systematically by tuning the cross-linking, grafting densities, and nanoparticle concentration. The simulated stress-strain curves are interpreted by monitoring the breaking of chemical bonds and the formation of voids, up to complete rupture of the systems. We find that some chemical bonds, and particularly the S-S linkages at the rubber-nanoparticle interface, start breaking well before the appearance of macroscopic features of fracture and yield.
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Affiliation(s)
- Alessio David
- Department
of Chemistry, Materials and Chemical Engineering, “G. Natta”, Politecnico di Milano, Milano 20131, Italy
| | | | - Mosè Casalegno
- Department
of Chemistry, Materials and Chemical Engineering, “G. Natta”, Politecnico di Milano, Milano 20131, Italy
| | - Guido Raos
- Department
of Chemistry, Materials and Chemical Engineering, “G. Natta”, Politecnico di Milano, Milano 20131, Italy,Email for G.R.:
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3
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Li D, Liu J, Liu J. NNI‐SMOTE‐XGBoost: A Novel Small Sample Analysis Method for Properties Prediction of Polymer Materials. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202100010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dazi Li
- College of Information Science and Technology Beijing University of Chemical Technology Beijing 100029 China
| | - Jianxun Liu
- College of Information Science and Technology Beijing University of Chemical Technology Beijing 100029 China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials Beijing University of Chemical Technology Beijing 100029 China
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4
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Wang X, Xie W, Li T, Ren J, Zhu J, Han N, Xing F. Molecular Dynamics Study on Mechanical Properties of Interface between Urea-Formaldehyde Resin and Calcium-Silicate-Hydrates. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4054. [PMID: 32932664 PMCID: PMC7558882 DOI: 10.3390/ma13184054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/29/2020] [Accepted: 09/08/2020] [Indexed: 02/01/2023]
Abstract
Microcapsule based self-healing concrete can automatically repair damage and improve the durability of concrete structures, the performance of which depends on the binding behavior between the microcapsule wall and cement matrix. However, conventional experimental methods could not provide detailed information on a microscopic level. In this paper, through molecular dynamics simulation, three composite models of Tobermorite (Tobermorite 9 Å, Tobermorite 11 Å, Tobermorite 14 Å), a mineral similar to Calcium-Silicate-Hydrate (C-S-H) gel, with the linear urea-formaldehyde (UF), the shell of the microcapsule, were established to investigate the mechanical properties and interface binding behaviour of the Tobermorite/UF composite. The results showed that the Young's modulus, shear modulus and bulk modulus of Tobermorite/UF were lower than that of 'pure' Tobermorite, whereas the tensile strength and failure strain of Tobermorite/UF were higher than that of 'pure' Tobermorite. Moreover, through radial distribution function (RDF) analysis, the connection between Tobermorite and UF found a strong interaction between Ca, N, and O, whereas Si from Tobermorite and N from UF did not contribute to the interface binding strength. Finally, high binding energy between the Tobermorite and UF was observed. The research results should provide insights into the interface behavior between the microcapsule wall and the cement matrix.
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Affiliation(s)
- Xianfeng Wang
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
| | - Wei Xie
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
| | - Taoran Li
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
| | - Jun Ren
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
- School of Science, Harbin Institute of Technology, Shenzhen 518055, China
| | - Jihua Zhu
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
| | - Ningxu Han
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
| | - Feng Xing
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; (X.W.); (W.X.); (T.L.); (N.H.); (F.X.)
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6
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Li D, Panchal K, Mafi R, Xi L. An Atomistic Evaluation of the Compatibility and Plasticization Efficacy of Phthalates in Poly(vinyl chloride). Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00756] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dongyang Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
| | - Kushal Panchal
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
| | - Roozbeh Mafi
- Canadian General
Tower, Ltd., Cambridge, Ontario N1R 5T6, Canada
| | - Li Xi
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
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7
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Tao W, Shen J, Chen Y, Liu J, Gao Y, Wu Y, Zhang L, Tsige M. Strain rate and temperature dependence of the mechanical properties of polymers: A universal time-temperature superposition principle. J Chem Phys 2018; 149:044105. [DOI: 10.1063/1.5031114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Wei Tao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Jianxiang Shen
- Department of Polymer Science and Engineering, Jiaxing University, Jiaxing 314001, People’s Republic of China
| | - Yulong Chen
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, People’s Republic of China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, People’s Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 100029 Beijing, People’s Republic of China
| | - Yangyang Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, People’s Republic of China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, People’s Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 100029 Beijing, People’s Republic of China
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, People’s Republic of China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, People’s Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 100029 Beijing, People’s Republic of China
| | - Mesfin Tsige
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, USA
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8
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Wan H, Shen J, Gao N, Liu J, Gao Y, Zhang L. Tailoring the mechanical properties by molecular integration of flexible and stiff polymer networks. SOFT MATTER 2018; 14:2379-2390. [PMID: 29503989 DOI: 10.1039/c7sm02282d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Designing a multiple-network structure at the molecular level to tailor the mechanical properties of polymeric materials is of great scientific and technological importance. Through the coarse-grained molecular dynamics simulation, we successfully construct an interpenetrating polymer network (IPN) composed of a flexible polymer network and a stiff polymer network. First, we find that there is an optimal chain stiffness for a single network (SN) to achieve the best stress-strain behavior. Then we turn to study the mechanical behaviors of IPNs. The result shows that the stress-strain behaviors of the IPNs appreciably exceed the sum of that of the corresponding single flexible and stiff network, which highlights the advantage of the IPN structure. By systematically varying the stiffness of the stiff polymer network of the IPNs, optimal stiffness also exists to achieve the best performance. We attribute this to a much larger contribution of the non-bonded interaction energy. Last, the effect of the component concentration ratio is probed. With the increase of the concentration of the flexible network, the stress-strain behavior of the IPNs is gradually enhanced, while an optimized concentration (around 60% molar ration) of the stiff network occurs, which could result from the dominant role of the enthalpy rather than the entropy. In general, our work is expected to provide some guidelines to better tailor the mechanical properties of the IPNs made of a flexible network and a stiff network, by manipulating the stiffness of the stiff polymer network and the component concentration ratio.
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Affiliation(s)
- Haixiao Wan
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, People's Republic of China.
| | - Jianxiang Shen
- Department of Polymer Science and Engineering, Jiaxing University, Jiaxing 314001, P. R. China
| | - Naishen Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, People's Republic of China.
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, People's Republic of China. and Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, People's Republic of China and Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, People's Republic of China and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, People's Republic of China
| | - Yangyang Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, People's Republic of China.
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, People's Republic of China. and Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, People's Republic of China and Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, People's Republic of China and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, People's Republic of China and State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 100029 Beijing, People's Republic of China
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9
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Molinari N, Sutton AP, Mostofi AA. Mechanisms of reinforcement in polymer nanocomposites. Phys Chem Chem Phys 2018; 20:23085-23094. [DOI: 10.1039/c8cp03281e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Qualitatively different stress–strain responses of polymer nanocomposites are shown to result from the dynamical evolution of three principal molecular structural motifs in the polymer–filler network.
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Affiliation(s)
- N. Molinari
- Department of Physics and the Thomas Young Centre for Theory and Simulation of Materials
- Imperial College London
- London SW7 2AZ
- UK
| | - A. P. Sutton
- Department of Physics and the Thomas Young Centre for Theory and Simulation of Materials
- Imperial College London
- London SW7 2AZ
- UK
| | - A. A. Mostofi
- Department of Physics and the Thomas Young Centre for Theory and Simulation of Materials
- Imperial College London
- London SW7 2AZ
- UK
- Department of Materials and the Thomas Young Centre for Theory and Simulation of Materials
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10
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Liu J, Wang Z, Zhang Z, Shen J, Chen Y, Zheng Z, Zhang L, Lyulin AV. Self-Assembly of Block Copolymer Chains To Promote the Dispersion of Nanoparticles in Polymer Nanocomposites. J Phys Chem B 2017; 121:9311-9318. [PMID: 28892620 PMCID: PMC5632811 DOI: 10.1021/acs.jpcb.7b08670] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 09/11/2017] [Indexed: 11/30/2022]
Abstract
In this paper we adopt molecular dynamics simulations to study the amphiphilic AB block copolymer (BCP) mediated nanoparticle (NP) dispersion in polymer nanocomposites (PNCs), with the A-block being compatible with the NPs and the B-block being miscible with the polymer matrix. The effects of the number and components of BCP, as well as the interaction strength between A-block and NPs on the spatial organization of NPs, are explored. We find that the increase of the fraction of the A-block brings different dispersion effect to NPs than that of B-block. We also find that the best dispersion state of the NPs occurs in the case of a moderate interaction strength between the A-block and the NPs. Meanwhile, the stress-strain behavior is probed. Our simulation results verify that adopting BCP is an effective way to adjust the dispersion of NPs in the polymer matrix, further to manipulate the mechanical properties.
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Affiliation(s)
- Jun Liu
- Key Laboratory of Beijing
City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zixuan Wang
- Key Laboratory of Beijing
City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhiyu Zhang
- Key Laboratory of Beijing
City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jianxiang Shen
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, P. R. China
| | - Yulong Chen
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zijian Zheng
- Key Laboratory of Beijing
City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- Hubei Collaborative Innovation Center for
Advanced Organic Chemical Materials, Key Laboratory for the Green
Preparation and Application of Functional Materials, Ministry of Education,
Hubei Key Laboratory of Polymer Materials, School of Materials Science
and Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Liqun Zhang
- Key Laboratory of Beijing
City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - 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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11
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Song Y, Zeng L, Guan A, Zheng Q. Time-concentration superpositioning principle accounting for reinforcement and dissipation of multi-walled carbon nanotubes filled polystyrene melts. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.06.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Song Y, Zeng L, Zheng Q. Reconsideration of the Rheology of Silica Filled Natural Rubber Compounds. J Phys Chem B 2017; 121:5867-5875. [PMID: 28520426 DOI: 10.1021/acs.jpcb.7b02760] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is substantial progress along with giant debate in reinforcement mechanisms in relation to structured filler network and heterogeneously retarded polymer dynamics, while the dissipation behaviors have never been clarified for nanoparticle filled polymers. Herein dynamic rheological behaviors of silica filled natural rubber were investigated. Master curves of linear rheology in the hydrodynamic regime and those of the nonlinear Payne effect at a predetermined frequency were created, disclosing a leading role of dynamically retarded bulk rubbery phase to the hydrodynamic regime and a leading role of molecular disentanglement in the bulk phase to the Payne effect. The methodology is able to account for both reinforcement and dissipation of the compounds as a function of filler content. Furthermore, a frequency-dependent hydrodynamic to non-hydrodynamic transition is revealed, revealing the importance of the relaxation of chains in the bulk phase to both reinforcement and dissipation of the compounds. It is suggested that the dynamics of the bulk phase play a critical role for the rheology in the hydrodynamic regime while the fractal filler aggregates become dominative only in the terminal non-hydrodynamic regime where the bulk phase relaxes sufficiently.
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Affiliation(s)
- Yihu Song
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Zhejiang University , Hangzhou 310027, China
| | - Lingbin Zeng
- Shanghai Aerospace System Engineering Institute , Shanghai 201110, China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Zhejiang University , Hangzhou 310027, China
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13
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14
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Wang W, Hou G, Zheng Z, Wang L, Liu J, Wu Y, Zhang L, Lyulin AV. Designing polymer nanocomposites with a semi-interpenetrating or interpenetrating network structure: toward enhanced mechanical properties. Phys Chem Chem Phys 2017; 19:15808-15820. [DOI: 10.1039/c7cp01453h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Semi-interpenetrating and interpenetrating network structures for the uniform dispersion of NPs and the reinforced mechanical properties of polymer nanocomposites.
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Affiliation(s)
- Wenhui Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Guanyi Hou
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Zijian Zheng
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Lu Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Alexey V. Lyulin
- Group Theory of Polymers and Soft Matter
- Department of Applied Physics
- Technische Universiteit Eindhoven
- Eindhoven
- The Netherlands
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15
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Guo Y, Liu J, Wu Y, Zhang L, Wang Z, Li Y. Molecular insights into the effect of graphene packing on mechanical behaviors of graphene reinforced cis-1,4-polybutadiene polymer nanocomposites. Phys Chem Chem Phys 2017; 19:22417-22433. [DOI: 10.1039/c7cp02945d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We adopt molecular dynamics simulation to study the graphene packing patterns on chain structure, dynamics, uniaxial tension and visco-elastic behaviors.
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Affiliation(s)
- Yishuo Guo
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Zhao Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Ying Li
- Department of Mechanical Engineering and Institute of Materials Science
- University of Connecticut
- Storrs
- USA
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16
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Hou G, Tao W, Liu J, Gao Y, Zhang L, Li Y. Tailoring the dispersion of nanoparticles and the mechanical behavior of polymer nanocomposites by designing the chain architecture. Phys Chem Chem Phys 2017; 19:32024-32037. [DOI: 10.1039/c7cp06199d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The dispersion of nanoparticles with different polymer–nanoparticle interaction strengths and chain architectures.
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Affiliation(s)
- Guanyi Hou
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Wei Tao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Yangyang Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Ying Li
- Department of Mechanical Engineering and Institute of Materials Science
- University of Connecticut
- Storrs
- USA
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Pavlov AS, Khalatur PG. Filler reinforcement in cross-linked elastomer nanocomposites: insights from fully atomistic molecular dynamics simulation. SOFT MATTER 2016; 12:5402-5419. [PMID: 27225453 DOI: 10.1039/c6sm00543h] [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
Using a fully atomistic model, we perform large-scale molecular dynamics simulations of sulfur-cured polybutadiene (PB) and nanosilica-filled PB composites. A well-integrated network without sol fraction is built dynamically by cross-linking the coarse-grained precursor chains in the presence of embedded silica nanoparticles. Initial configurations for subsequent atomistic simulations are obtained by reverse mapping of the well-equilibrated coarse-grained systems. Based on the concept of "maximally inflated knot" introduced by Grosberg et al., we show that the networks simulated in this study behave as mechanically isotropic systems. Analysis of the network topology in terms of graph theory reveals that mechanically inactive tree-like structures are the dominant structural components of the weakly cross-linked elastomer, while cycles are mainly responsible for the transmission of mechanical forces through the network. We demonstrate that quantities such as the system density, thermal expansion coefficient, glass transition temperature and initial Young's modulus can be predicted in qualitative and sometimes even in quantitative agreement with experiments. The nano-filled system demonstrates a notable increase in the glass transition temperature and an approximately two-fold increase in the nearly equilibrium value of elastic modulus relative to the unfilled elastomer even at relatively small amounts of filler particles. We also examine the structural rearrangement of the nanocomposite subjected to tensile deformation. Under high strain-rate loading, the formation of structural defects (microcavities) within the polymer bulk is observed. The nucleation and growth of cavities in the post-yielding strain hardening regime mainly take place at the elastomer/nanoparticle interfaces. As a result, the cavities are concentrated just near the embedded nanoparticles. Therefore, while the silica nanofiller increases the elastic modulus of the elastomer, it also creates a more defective structure of higher energy in comparison with the unfilled network.
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Affiliation(s)
- Alexander S Pavlov
- Department of Physical Chemistry, Tver State University, Tver, 170100, Russia.
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Fully atomistic molecular dynamics simulation of nanosilica-filled crosslinked polybutadiene. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.061] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Luo Y, Qu L, Su H, Chan TW, Wu S. Effect of chemical structure of elastomer on filler dispersion and interactions in silica/solution-polymerized styrene butadiene rubber composites through molecular dynamics simulation. RSC Adv 2016. [DOI: 10.1039/c5ra24965a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The dynamic properties, filler–rubber interactions, and filler dispersion in silica/SSBR composites with various chemical structures of SSBR were studied using MD. Competing effects led to the existence of an optimum modifier content of 14.2 wt%.
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Affiliation(s)
- Yanlong Luo
- State Key Laboratory of Organic–Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P.R. China
| | - Liangliang Qu
- Yanshan Branch of Beijing Research Institute of Chemical Industry
- China Petroleum & Chemical Company (Sinopec Corp.)
- Beijing 102500
- P.R. China
| | - Huifang Su
- State Key Laboratory of Organic–Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P.R. China
| | - Tung W. Chan
- Department of Materials Science and Engineering
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - Sizhu Wu
- State Key Laboratory of Organic–Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P.R. China
- Beijing Engineering Research Center of Advanced Elastomers
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Raos G, Idé J. Impact of Interaction Strength and Surface Heterogeneity on the Dynamics of Adsorbed Polymers. ACS Macro Lett 2014; 3:721-726. [PMID: 35590689 DOI: 10.1021/mz500233c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present molecular dynamics simulations of bead-and-spring polymer chains on chemically heterogeneous, energetically disordered surfaces at near-monolayer coverages. The surfaces consist of random mixtures of weakly (W) and strongly (S) attractive sites. We explore systematically the effect of surface composition on the diffusive dynamics of the chains. The polymer diffusion coefficients have a near-Arrhenius temperature dependence, with activation energies which have a nonmonotonic dependence on the fraction of S sites. In other words, we see a nonmonotonic dependence of the interfacial polymer dynamics on its affinity with the surface, when the latter involves some heterogeneity. The maximum activation energy belongs to the surface containing 75% S and 25% W sites, which combines near-maximum average polymer-surface interactions with near-maximum spread or disorder in these interactions. Our results have interesting implications for polymer adhesion and friction and structure-property relationships in polymer nanocomposites.
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Affiliation(s)
- Guido Raos
- Dipartimento di Chimica,
Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
| | - Julien Idé
- Dipartimento di Chimica,
Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
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Shen J, Liu J, Gao Y, Li X, Zhang L. Elucidating and tuning the strain-induced non-linear behavior of polymer nanocomposites: a detailed molecular dynamics simulation study. SOFT MATTER 2014; 10:5099-5113. [PMID: 24906702 DOI: 10.1039/c4sm00233d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
By setting up a coarse-grained model of polymer nanocomposites, we monitored the change in the elastic modulus as a function of the strain, derived from the stress-strain behavior by determining uniaxial tension and simple shear of two typical spatial distribution states (aggregation and dispersion) of nanoparticles (NPs). In both these cases, we observed that the elastic modulus decreases non-linearly with the increase of strain and reaches a low plateau at larger strains. This phenomenon is similar to the so-called "Payne effect" for elastomer nanocomposites. Particularly, the modulus of the aggregation case is more sensitive to the imposed strain. By examining the structural parameters, such as the number of neighboring NPs, coordination number of NPs, root-mean-squared average force exerted on the NPs, local strain, chain conformations (bridge, dangle, loop, interface bead and connection bead), and the total interaction energy of NP-polymer and NP-NP, we inferred that the underlying mechanism of the aggregation case is the disintegration of the NP network or clusters formed through direct contact; however, for the dispersion case, the non-linear behavior is attributed to the destruction of the NP network or clusters formed through the bridging of adsorbed polymer segments among the NPs. The former physical network is influenced by NP-NP interaction and NP volume fraction, while the latter is influenced by NP-polymer interaction and NP volume fraction. Lastly, we found that for the dispersion case, further increasing the inter-particle distance or grafting NPs with polymer chains can effectively reduce the non-linear behavior due to the decrease of the physical network density. In general, this simulation work, for the first time, establishes the correlation between the micro-structural evolution and the strain-induced non-linear behavior of polymer nanocomposites, and sheds some light on how to reduce the "Payne effect".
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Affiliation(s)
- Jianxiang Shen
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
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