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Li J, Lu Y, Hao L, Zhang R, Ding M, Shi T. Dynamics Transition of Polymer Films Induced by Polymer–Obstacle Entanglements on Rough Surfaces. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00114] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiaxiang Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yuyuan Lu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Lili Hao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Ran Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Mingming Ding
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Tongfei Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
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2
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Neyertz S, Brown D. The effect of structural isomerism on carbon dioxide sorption and plasticization at the interface of a glassy polymer membrane. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.03.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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3
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Neyertz S, Brown D. Molecular Dynamics Study of Carbon Dioxide Sorption and Plasticization at the Interface of a Glassy Polymer Membrane. Macromolecules 2013. [DOI: 10.1021/ma302073u] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sylvie Neyertz
- LEPMI (LMOPS), UMR 5279 CNRS, Grenoble
INP, University
of Savoie, University J. Fourier, Bât.
IUT, Savoie Technolac, 73376 Le Bourget du Lac Cedex, France
| | - David Brown
- LEPMI (LMOPS), UMR 5279 CNRS, Grenoble
INP, University
of Savoie, University J. Fourier, Bât.
IUT, Savoie Technolac, 73376 Le Bourget du Lac Cedex, France
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4
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Ijantkar AS, Natarajan U. Prediction of Structure and Energy of Trans-1,4-Polybutadiene Glassy Surface by Atomistic Simulations of Free-Standing Ultrathin Films. J MACROMOL SCI B 2012. [DOI: 10.1080/00222348.2012.669683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ashwini S. Ijantkar
- a Division of Polymer Science and Engineering National Chemical Laboratory , Pune , India
| | - Upendra Natarajan
- a Division of Polymer Science and Engineering National Chemical Laboratory , Pune , India
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5
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De Virgiliis A, Milchev A, Rostiashvili VG, Vilgis TA. Structure and dynamics of a polymer melt at an attractive surface. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2012; 35:97. [PMID: 23053843 DOI: 10.1140/epje/i2012-12097-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 03/06/2012] [Accepted: 08/24/2012] [Indexed: 06/01/2023]
Abstract
We study the structural and dynamic properties of a polymer melt in the vicinity of an adhesive solid substrate by means of Molecular Dynamics simulation at various degrees of surface adhesion. The properties of the individual polymer chains are examined as a function of the distance to the interface and found to agree favorably with theoretical predictions. Thus, the adsorbed amount at the adhesive surface is found to scale with the macromolecule length as Γ is proportional to √N, regardless of the adsorption strength. For chains within the range of adsorption we analyze in detail the probability size distributions of the various building blocks: loops, tails and trains, and find that loops and tails sizes follow power laws while train lengths decay exponentially thus confirming some recent theoretical results. The chain dynamics as well as the monomer mobility are also investigated and found to depend significantly on the proximity of a given layer to the solid adhesive surface with onset of vitrification for sufficiently strong adsorption.
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Affiliation(s)
- A De Virgiliis
- Max Planck Institut für Polymerforschung, Mainz, Germany.
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6
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Mizutani N, Korposh S, Selyanchyn R, Yang DH, Lee CS, Lee SW, Kunitake T. One-step Fabrication of Polystyrene–TiO2 Nanosandwich Film by Phase Separation. CHEM LETT 2012. [DOI: 10.1246/cl.2012.552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoki Mizutani
- Graduate School of Environmental Engineering, The University of Kitakyushu
| | - Sergiy Korposh
- Graduate School of Environmental Engineering, The University of Kitakyushu
| | - Roman Selyanchyn
- Graduate School of Environmental Engineering, The University of Kitakyushu
| | - Do-Hyeon Yang
- Graduate School of Environmental Engineering, The University of Kitakyushu
| | - Chang-Soo Lee
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology
| | - Seung-Woo Lee
- Graduate School of Environmental Engineering, The University of Kitakyushu
| | - Toyoki Kunitake
- Kitakyushu Foundation for the Advancement of Industry, Science and Technology
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7
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8
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Schoolenberg TGE, During F, Ingenbleek G. Coalescence measurements for PS (polystyrene) matrix blends using the spinning drop apparatus. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19961120116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Pan C, Bitsanis I. Structure, conformation and dynamics of polymer chains at solid melt interfaces. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19930650124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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10
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Effects of unsaturation on film structure and friction of fatty acids in a model base oil. J Colloid Interface Sci 2008; 326:530-6. [DOI: 10.1016/j.jcis.2008.05.068] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Revised: 05/21/2008] [Accepted: 05/23/2008] [Indexed: 11/21/2022]
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11
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Manias E, Subbotin A, Hadziioannou G, Ten Brinke G. Adsorption-desorption kinetics in nanoscopically confined oligomer films under shear. Mol Phys 2008. [DOI: 10.1080/00268979500101621] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Ma Y, Zha L, Hu W, Reiter G, Han CC. Crystal nucleation enhanced at the diffuse interface of immiscible polymer blends. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 77:061801. [PMID: 18643289 DOI: 10.1103/physreve.77.061801] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2007] [Indexed: 05/26/2023]
Abstract
We report dynamic Monte Carlo simulations of immiscible binary polymer blends, which exhibit weakly enhanced crystal nucleation near interfaces between two phase-separated polymers. We found that this enhancement is not accompanied by any preferred crystal orientation, implying its origin is mainly of enthalpic rather than entropic nature. Mean-field theory of polymer blends predicts that for immiscible polymers the melting point of the crystallizable component increases upon dilution in the other component, while it normally decreases for miscible blends. A local dilution is forced to occur at the diffuse interface of immiscible polymers; therefore the melting point of crystallizable polymers rises, which, in turn, enhances the thermodynamic driving force for crystal nucleation near the interface.
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Affiliation(s)
- Yu Ma
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
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13
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Neyertz S, Brown D. Molecular Dynamics Simulations of Oxygen Transport through a Fully Atomistic Polyimide Membrane. Macromolecules 2008. [DOI: 10.1021/ma7026676] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sylvie Neyertz
- LMOPS-UMR CNRS 5041, University of Savoie, Bât IUT, 73376 Le Bourget du Lac Cedex, France
| | - David Brown
- LMOPS-UMR CNRS 5041, University of Savoie, Bât IUT, 73376 Le Bourget du Lac Cedex, France
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Ma Y, Hu W, Hobbs J, Reiter G. Understanding crystal orientation in quasi-one-dimensional polymer systems. SOFT MATTER 2008; 4:540-543. [PMID: 32907217 DOI: 10.1039/b715065b] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We performed molecular simulations of polymer crystallization confined in rigid nanotubes. We found that the neutrally repulsive walls of nanotubes enhance the crystal nucleation. This enhancement gives uniform crystal orientation parallel to the tube axis at high temperatures. However, the nanotube walls that are wetted by the polymer, i.e. 'sticky' walls, switch the dominant crystal orientation from parallel to perpendicular. Since only perpendicularly oriented crystals can grow along the tube to give high crystallinities, the sticky walls provide a promising route towards the mass production of uniformly oriented nanocrystals in quasi-one-dimensional polymer systems.
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Affiliation(s)
- Yu Ma
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
| | - Wenbing Hu
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
| | - Jamie Hobbs
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, United Kingdom
| | - Günter Reiter
- Institut de Chimie des Surfaces et Interfaces, CNRS-UHA, 15, rue Jean Starcky, B.P. 2488, 68057 Mulhouse Cedex, France
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15
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Wang J, Butt HJ. Forces between thiolate-modified gold surfaces in a melt of end-functionalized polymers. J Phys Chem B 2008; 112:2001-7. [PMID: 18229910 DOI: 10.1021/jp0760612] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To better understand surface forces across polymer melts, we measured the force between two chemically well-defined solid surfaces in a melt of polymer chains with a functional end group. As for surfaces, we used self-assembed monolayers (SAMs) of alkyl thiols with different end groups (methyl, amino, and hydroxyl) on gold. The polymer was a hydroxyl-terminated polyisoprene. To measure the force, an atomic force microscope was used. Between methyl-terminated SAMs, a weak and short-range repulsion was detected. Between hydroxyl or amino-terminated SAMs, a strong and long-range repulsion was observed up to distances of 16 nm. This indicates that the hydroxyl group of the polymer binds to the hydroxyl or amino groups of the SAMs. It forms a brush-like structure, which leads to steric repulsion. On amino-terminated SAMs, force-versus-distance curves on approach and retraction were monotonically repulsive and reversible. With hydroxyl-terminated SAMs, a jump was observed on approach when the load exceeded a certain threshold. On retraction, an adhesion had to be overcome. We interpret the jump as a rupture of the polymer layer. It indicates that the kinetics of bond and brush formation is faster on OH-SAMs than on NH2-SAMs.
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Affiliation(s)
- Jijun Wang
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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16
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Chen SB. Monte Carlo simulations of conformations of chain molecules in a cylindrical pore. J Chem Phys 2007; 123:074702. [PMID: 16229605 DOI: 10.1063/1.2000250] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Off-lattice Monte Carlo simulations are employed to study the behavior of chain molecules confined in a long cylindrical pore under the condition of hard-body interaction. The emphasis is placed on the chain and bead distributions as well as the location dependence of the chain conformation and anisotropy. The simulation results show that the chains very near the pore surface tend to wrap around the surface in various configurations. This behavior is qualitatively similar to that of the chains near but outside a cylindrical rod. Moreover, the bead concentration near the pore surface increases with increasing surface curvature.
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Affiliation(s)
- Shing Bor Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576.
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17
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Prathab B, Aminabhavi TM. Atomistic simulations to compute surface properties of poly(N-vinyl-2-pyrrolidone) (PVP) and blends of PVP/chitosan. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:5439-44. [PMID: 17402756 DOI: 10.1021/la063228u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Atomistic simulations were performed on poly(N-vinyl-2-pyrrolidone) (PVP) and its blends with chitosan (CS) in different ratios using molecular mechanics (MM) and molecular dynamics (MD) simulations in three-dimensionally periodic and effective two-dimensionally periodic condensed phases. Four independent microstructures were generated to analyze their surface properties. The calculated surface-energy values for PVP compared quite well with the experimental data reported in the literature. The density profile was analyzed, and the structure of the films showed an interior region of the bulk density. Various components of the energetic interactions (torsional, van der Waals, etc.) were examined to gain deeper insight into the nature of regular and anomalous interactions between the bulk and the surface films. Surface energies of PVP/CS blends were computed by MD simulations using the bulk pressure-volume-temperature (PVT) parameters. Bulk properties such as the cohesive energy density (CED) and solubility parameter (delta) were calculated using MM and MD simulations in the NVT ensemble under periodic boundary conditions. The Flory equation of state was used to compute the thermal expansion coefficient as well as PVT parameters. These surface-energy values agreed well with the surface-energy data calculated using the Zisman equation, which were also in accordance with the experimental observations. The results from this study suggest that computer simulations would provide valuable information on polymers and polymer-blend surfaces.
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Affiliation(s)
- B Prathab
- Molecular Modeling Division, Center of Excellence in Polymer Science, Karnatak University, Dharwad, India 580 003
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18
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Quasi-static and hydrodynamic interaction between solid surfaces in polyisoprene studied by atomic force microscopy. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.06.064] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Neyertz S, Douanne A, Brown D. A molecular dynamics simulation study of surface effects on gas permeation in free-standing polyimide membranes. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2006.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Ma Y, Hu, Reiter G. Lamellar Crystal Orientations Biased by Crystallization Kinetics in Polymer Thin Films. Macromolecules 2006. [DOI: 10.1021/ma060798s] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu Ma
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, China, and Institut de Chimie des Surfaces et Interfaces, CNRS-UHA, 15, rue Jean Starcky, B.P. 2488, 68057 Mulhouse Cedex, France
| | - Hu
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, China, and Institut de Chimie des Surfaces et Interfaces, CNRS-UHA, 15, rue Jean Starcky, B.P. 2488, 68057 Mulhouse Cedex, France
| | - Günter Reiter
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, China, and Institut de Chimie des Surfaces et Interfaces, CNRS-UHA, 15, rue Jean Starcky, B.P. 2488, 68057 Mulhouse Cedex, France
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21
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Neyertz S, Douanne A, Brown D. Effect of Interfacial Structure on Permeation Properties of Glassy Polymers. Macromolecules 2005. [DOI: 10.1021/ma051463y] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sylvie Neyertz
- Laboratoire Matériaux Organiques à Propriétés Spécifiques (LMOPS), UMR CNRS 5041, Université de Savoie, Bât. IUT, 73376 Le Bourget du Lac Cedex, France
| | - Anthony Douanne
- Laboratoire Matériaux Organiques à Propriétés Spécifiques (LMOPS), UMR CNRS 5041, Université de Savoie, Bât. IUT, 73376 Le Bourget du Lac Cedex, France
| | - David Brown
- Laboratoire Matériaux Organiques à Propriétés Spécifiques (LMOPS), UMR CNRS 5041, Université de Savoie, Bât. IUT, 73376 Le Bourget du Lac Cedex, France
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22
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Leermakers FAM, Butt HJ. Surface forces in a confined polymer melt: self-consistent field analysis of full and restricted equilibrium cases. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 72:021807. [PMID: 16196597 DOI: 10.1103/physreve.72.021807] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Indexed: 05/04/2023]
Abstract
In full equilibrium the self-consistent field theory for a homopolymer melt confined between two surfaces predicts pronounced oscillatory interaction forces on the monomer length scale. However, when not all the polymer molecules can reversibly equilibrate with the bulk, the trapped molecules may be squeezed, adding a repulsive contribution to the interaction energy. The classical constrained or restricted equilibrium approach by Scheutjens and Fleer two decades ago to deal with this for polymers adsorbed from dilute solutions, breaks down in semidilute and concentrated polymer solutions. We present a generalized restricted equilibrium ansatz applicable also for concentrated polymer solutions. The key idea is that only the adsorbed polymer molecules, i.e., molecules that touch the surface at least once, are forced to remain inside the gap, whereas the nonadsorbing chains are free to move out of the gap when the surfaces approach each other. As in dilute solutions, the forces found in confined melt with trapped adsorbed chains become repulsive. We analyse the dependence of the interaction forces both in full as well as in restricted equilibrium cases as a function of the chain length and the interactions with the surface for a compressible polymer melt.
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Affiliation(s)
- F A M Leermakers
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6708 HB, Wageningen, The Netherlands
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24
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Wang Y. Confinement free energy and chain conformations of homopolymers confined between two repulsive walls. J Chem Phys 2004; 121:3898-904. [PMID: 15303958 DOI: 10.1063/1.1777222] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Lattice Monte Carlo simulations of polymer solutions confined between two parallel plates were performed. The confinement free energy Deltamicro(conf) per chain and the radius of gyrations of the chains parallel and perpendicular to the plates were obtained. When the concentration of the confined solution is above the overlap concentration, Deltamicro(conf) is found to scale with Na/D in a power law, betaDeltamicro(conf) approximately (Na/D)(m), with an exponent m=1.10+/-0.02 for athermal walls where N is the number of monomers in a chain, D is the slit width, and a is the lattice spacing. The presence of a weak attractive polymer/wall interaction epsilon(w) does not change the scaling variable, but the exponent m increases slightly. Extrapolating the results to melt would suggest that the predictions made by de Gennes [C. R. Acad. Sci. Paris II 305, 1181 (1987)] about the confinement free energy cost per chain in polymer melt is correct as far as the scaling variable is concerned, but is incorrect about the exponent m observed. The implication of this result on the predicted force between plates immersed in polymer melt is discussed. The parallel dimensions of the confined chain is expanded when the slit width D is narrow, however, the expansion is reduced at high concentration. It is conceivable that in melt the chain is not expanded when confined in a repulsive slit.
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Affiliation(s)
- Yongmei Wang
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152-3550, USA
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25
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Jiang W, Wang Y. Thermodynamics and partitioning of homopolymers into a slit-A grand canonical Monte Carlo simulation study. J Chem Phys 2004; 121:3905-13. [PMID: 15303959 DOI: 10.1063/1.1777223] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Grand canonical ensemble Monte Carlo simulation (GCMC) combined with the histogram reweighting technique was used to study the thermodynamic equilibrium of a homopolymer solution between a bulk and a slit pore. GCMC gives the partition coefficients that agree with those from canonical ensemble Monte Carlo simulations in a twin box, and it also gives results that are not accessible through the regular canonical ensemble simulation such as the osmotic pressure of the solution. In a bulk polymer solution, the calculated osmotic pressure agrees very well with the scaling theory predictions both for the athermal polymer solution and the theta solution. However, one cannot obtain the osmotic pressure of the confined solution in the same way since the osmotic pressure of the confined solution is anisotropic. The chemical potentials in GCMC simulations were found to differ by a translational term from the chemical potentials obtained from canonical ensemble Monte Carlo simulations with the chain insertion method. This confirms the equilibrium condition of a polymer solution partition between the bulk and a slit pore: the chemical potentials of the polymer chain including the translational term are equal at equilibrium. The histogram reweighting method enables us to obtain the partition coefficients in the whole range of concentrations based on a limited set of simulations. Those predicted bulk-pore partition coefficient data enable us to perform further theoretical analysis. Scaling predictions of the partition coefficient at different regimes were given and were confirmed by the simulation data.
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Affiliation(s)
- Wenhua Jiang
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152-3550
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Abstract
A model of star-branched polymer chains confined in a slit formed by two parallel surfaces was studied. The chains were embedded to a simple cubic lattice and consisted of f=3 branches of equal length. The macromolecules had the excluded volume and the confining surfaces were impenetrable for polymer segments. No attractive interactions between polymer segments and then between polymer segments and the surfaces were assumed and therefore the system was a thermal. Monte Carlo simulations were carried out employing the sampling algorithm based on chain's local changes of conformation. Lateral diffusion of star-branched chains was studied. Dynamic properties of star-branched chains between the walls with impenetrable rod-like obstacles were also studied and compared to the previous case. The density profiles of polymer segments on the slit were determined. The analysis of contacts between the polymer chain and the surfaces was also carried out.
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Affiliation(s)
- Andrzej Sikorski
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland
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27
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Atomistic simulations of the structure and thermodynamic properties of poly(1,2-vinyl-butadiene) surfaces. POLYMER 2004. [DOI: 10.1016/j.polymer.2003.09.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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Chen SB, Wang XY, Chiew YC. Monte Carlo simulations of conformations of short chains near a cylindrical rod. J Chem Phys 2003. [DOI: 10.1063/1.1578626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Schönherr H, Frank CW. Ultrathin Films of Poly(ethylene oxides) on Oxidized Silicon. 2. In Situ Study of Crystallization and Melting by Hot Stage AFM. Macromolecules 2003. [DOI: 10.1021/ma020686a] [Citation(s) in RCA: 162] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Holger Schönherr
- NSF MRSEC Center on Polymer Interfaces and Macromolecular Assemblies (CPIMA) and Department of Chemical Engineering, Stanford University, Stanford, California 94305-5025
| | - Curtis W. Frank
- NSF MRSEC Center on Polymer Interfaces and Macromolecular Assemblies (CPIMA) and Department of Chemical Engineering, Stanford University, Stanford, California 94305-5025
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30
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Schönherr H, Frank CW. Ultrathin Films of Poly(ethylene oxides) on Oxidized Silicon. 1. Spectroscopic Characterization of Film Structure and Crystallization Kinetics. Macromolecules 2003. [DOI: 10.1021/ma020685i] [Citation(s) in RCA: 200] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Holger Schönherr
- NSF MRSEC Center on Polymer Interfaces and Macromolecular Assemblies (CPIMA) and Department of Chemical Engineering, Stanford University, Stanford, California 94305-5025
| | - Curtis W. Frank
- NSF MRSEC Center on Polymer Interfaces and Macromolecular Assemblies (CPIMA) and Department of Chemical Engineering, Stanford University, Stanford, California 94305-5025
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31
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32
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Lenhart JL, Wu WL. Deviations in the Thermal Properties of Ultrathin Polymer Network Films. Macromolecules 2002. [DOI: 10.1021/ma011903v] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph L. Lenhart
- National Institute of Standards and Technology, 100 Bureau Drive Stop 8541, Gaithersburg, Maryland 20899-8541
| | - Wen-li Wu
- National Institute of Standards and Technology, 100 Bureau Drive Stop 8541, Gaithersburg, Maryland 20899-8541
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33
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Romiszowski P, Sikorski A. Monte Carlo simulations of star-branched polymers confined between two walls. J Chem Phys 2002. [DOI: 10.1063/1.1429657] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Polymer films in the normal-liquid and supercooled state: a review of recent Monte Carlo simulation results. Adv Colloid Interface Sci 2001. [DOI: 10.1016/s0001-8686(01)00061-6] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Liang T, Makita Y, Kimura S. Effect of film thickness on the electrical properties of polyimide thin films. POLYMER 2001. [DOI: 10.1016/s0032-3861(00)00881-8] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Patra CN, Yethiraj A, Curro JG. The effect of attractions on the structure of fused sphere chains confined between surfaces. J Chem Phys 1999. [DOI: 10.1063/1.479421] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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37
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Zeghal M, Deloche B, Auroy P. Chain Segment Ordering in Swollen Polymer Brushes: Deuterium NMR Investigations. Macromolecules 1999. [DOI: 10.1021/ma981153y] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mehdi Zeghal
- Laboratoire de Physique des Solides (CNRS-UMR 8502), Université Paris Sud, Orsay 91405, France, and Institut Curie, Section de Recherche (CNRS-UMR 168), 11 rue Pierre et Marie Curie, Paris 75005, France
| | - Bertrand Deloche
- Laboratoire de Physique des Solides (CNRS-UMR 8502), Université Paris Sud, Orsay 91405, France, and Institut Curie, Section de Recherche (CNRS-UMR 168), 11 rue Pierre et Marie Curie, Paris 75005, France
| | - Philippe Auroy
- Laboratoire de Physique des Solides (CNRS-UMR 8502), Université Paris Sud, Orsay 91405, France, and Institut Curie, Section de Recherche (CNRS-UMR 168), 11 rue Pierre et Marie Curie, Paris 75005, France
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38
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Bartczak Z, Argon A, Cohen R, Kowalewski T. The morphology and orientation of polyethylene in films of sub-micron thickness crystallized in contact with calcite and rubber substrates. POLYMER 1999. [DOI: 10.1016/s0032-3861(98)00443-1] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Schoolenberg G, During F, Ingenbleek G. Coalescence and interfacial tension measurements for polymer melts: experiments on a PS-PE model system. POLYMER 1998. [DOI: 10.1016/s0032-3861(97)00377-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Ybarra RM, Neogi P, MacElroy JMD. Osmotic Stresses and Wetting by Polymer Solutions. Ind Eng Chem Res 1998. [DOI: 10.1021/ie9704859] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. M. Ybarra
- Chemical Engineering Department, University of MissouriRolla, Rolla, Missouri 65409
| | - P. Neogi
- Chemical Engineering Department, University of MissouriRolla, Rolla, Missouri 65409
| | - J. M. D. MacElroy
- Chemical Engineering Department, University College Dublin, Dublin, Ireland
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41
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Foo GM, Pandey RB. Electro-deposition of polymer chains on an adsorbing wall: Density profiles and wall coverage. J Chem Phys 1997. [DOI: 10.1063/1.474166] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Pai-Panandiker RS, Dorgan JR, Pakula T. Static Properties of Homopolymer Melts in Confined Geometries Determined by Monte Carlo Simulation. Macromolecules 1997. [DOI: 10.1021/ma9618585] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. S. Pai-Panandiker
- Department of Chemical Engineering, Colorado School of Mines, Golden, Colorado 80401
| | - J. R. Dorgan
- Department of Chemical Engineering, Colorado School of Mines, Golden, Colorado 80401
| | - Tadeusz Pakula
- Max-Planck-Institut für Polymerforschung, Ackerman Weg 10, D-55021, Mainz, FRG
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43
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Jorge S, Rey A. Conformational properties of flexible polymer chains in highly confined environments. J Chem Phys 1997. [DOI: 10.1063/1.473591] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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44
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Frank CW, Rao V, Despotopoulou MM, Pease RFW, Hinsberg WD, Miller RD, Rabolt JF. Structure in Thin and Ultrathin Spin-Cast Polymer Films. Science 1996; 273:912-5. [PMID: 8688068 DOI: 10.1126/science.273.5277.912] [Citation(s) in RCA: 424] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The molecular organization in ultrathin polymer films (thicknesses less than 1000 angstroms) and thin polymer films (thicknesses between 1000 and 10,000 angstroms) may differ substantially from that of bulk polymers, which can lead to important differences in resulting thermophysical properties. Such constrained geometry films have been fabricated from amorphous poly(3-methyl-4-hydroxy styrene) (PMHS) and semicrystalline poly(di-n-hexyl silane) (PD6S) by means of spin-casting. The residual solvent content is substantially greater in ultrathin PMHS films, which suggests a higher glass transition temperature that results from a stronger hydrogen-bonded network as compared with that in thicker films. Crystallization of PD6S is substantially hindered in ultrathin films, in which a critical thickness of 150 angstroms is needed for crystalline morphology to exist and in which the rate of crystallization is initially slow but increases rapidly as the film approaches 500 angstroms in thickness.
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Affiliation(s)
- CW Frank
- C. W. Frank, V. Rao, and M. M. Despotopoulou are in the Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA. R. F. W. Pease is in the Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA. W. D. Hinsberg, R. D. Miller, and J. F. Rabolt are at the IBM Almaden Research Center, IBM Research Division, 650 Harry Road, San Jose, CA 95120-6099, USA
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46
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Ligoure C. Adhesion between a Polymer Brush and an Elastomer: A Self-Consistent Mean Field Model. Macromolecules 1996. [DOI: 10.1021/ma9516293] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christian Ligoure
- Groupe de Dynamique des Phases Condensées C.C. 026 (Unité Mixte de Recherche Université-CNRS 5581), Université Montpellier II, F-34095 Montpellier Cedex 05, France
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47
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Rouault Y, Dünweg B, Baschnagel J, Binder K. Concentration profile near the surface of polymer mixtures: a Monte Carlo study. POLYMER 1996. [DOI: 10.1016/0032-3861(96)81102-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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49
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Structure and energy of thin films of poly-(1,4-cis-butadiene): A new atomistic approach. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf00701616] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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Lai P. Statics and dynamics of adsorbed polymer chains: A Monte Carlo simulation. J Chem Phys 1995. [DOI: 10.1063/1.470454] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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