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Mathioudakis IG, Vogiatzis GG, Tzoumanekas C, Theodorou DN. Multiscale simulations of PS-SiO2 nanocomposites: from melt to glassy state. SOFT MATTER 2016; 12:7585-7605. [PMID: 27532769 DOI: 10.1039/c6sm01536k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interaction energetics, molecular packing, entanglement network properties, segmental dynamics, and elastic constants of atactic polystyrene-amorphous silica nanocomposites in the molten and the glassy state are studied via molecular simulations using two interconnected levels of representation: (a) a coarse-grained one, wherein each polystyrene repeat unit is mapped onto a single "superatom" and the silica nanoparticle is viewed as a solid sphere. Equilibration at all length scales at this level is achieved via connectivity-altering Monte Carlo simulations. (b) A united-atom (UA) level, wherein the polymer chains are represented in terms of a united-atom forcefield and the silica nanoparticle is represented in terms of a simplified, fully atomistic model. Initial configurations for UA molecular dynamics (MD) simulations are obtained by reverse mapping well-equilibrated coarse-grained configurations. By analysing microcanonical UA MD trajectories, the polymer density profile is studied and the polymer is found to exhibit layering in the vicinity of the nanoparticle surface. An estimate of the enthalpy of mixing between polymer and nanoparticles, derived from the UA simulations, compares favourably against available experimental values. The dynamical behaviour of polystyrene (in neat and filled melt systems) is characterized in terms of bond orientation and dihedral angle time autocorrelation functions. At low concentration in the molten polymer matrix, silica nanoparticles are found to cause a slight deceleration of the segmental dynamics close to their surface compared to the bulk polymer. Well-equilibrated coarse-grained long-chain configurations are reduced to entanglement networks via topological analysis with the CReTA algorithm, yielding a slightly lower density of entanglements in the filled than in the neat systems. UA melt configurations are glassified by MD cooling. The elastic moduli of the resulting glassy nanocomposites are computed through an analysis of strain fluctuations in the undeformed state and through explicit mechanical deformation by MD, showing a stiffening of the polymer in the presence of nanoparticles. UA simulation results for the elastic constants are compared to continuum micromechanical calculations invoked in homogenization models of the overall mechanical behaviour of heterogeneous materials. They can be interpreted in terms of the presence of an "interphase" of approximate thickness 2 nm around the nanoparticles, with elastic constants intermediate between those of the filler and the matrix.
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Affiliation(s)
- I G Mathioudakis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, GR-15780 Athens, Greece.
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Vogiatzis GG, Theodorou DN. Local Segmental Dynamics and Stresses in Polystyrene–C60 Mixtures. Macromolecules 2013. [DOI: 10.1021/ma402214r] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Georgios G. Vogiatzis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou
Campus, GR-15780 Athens, Greece
| | - Doros N. Theodorou
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou
Campus, GR-15780 Athens, Greece
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Carbone P, Ali Karimi-Varzaneh H, Müller-Plathe F. Fine-graining without coarse-graining: an easy and fast way to equilibrate dense polymer melts. Faraday Discuss 2010; 144:25-42; discussion 93-110, 467-81. [DOI: 10.1039/b902363a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Hu KN, Havlin RH, Yau WM, Tycko R. Quantitative determination of site-specific conformational distributions in an unfolded protein by solid-state nuclear magnetic resonance. J Mol Biol 2009; 392:1055-73. [PMID: 19647001 DOI: 10.1016/j.jmb.2009.07.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Revised: 06/27/2009] [Accepted: 07/25/2009] [Indexed: 10/20/2022]
Abstract
Solid-state nuclear magnetic resonance (NMR) techniques are used to investigate the structure of the 35-residue villin headpiece subdomain (HP35) in folded, partially denatured, and fully denatured states. Experiments are carried out in frozen glycerol/water solutions, with chemical denaturation by guanidine hydrochloride (GdnHCl). Without GdnHCl, two-dimensional solid-state (13)C NMR spectra of samples prepared with uniform (13)C labeling of selected residues show relatively sharp cross-peaks at chemical shifts that are consistent with the known three-helix bundle structure of folded HP35. At high GdnHCl concentrations, most cross-peaks broaden and shift, qualitatively indicating disruption of the folded structure and development of static conformational disorder in the frozen denatured state. Conformational distributions at one residue in each helical segment are probed quantitatively with three solid-state NMR techniques that provide independent constraints on backbone varphi and psi torsion angles in samples with sequential pairs of carbonyl (13)C labels. Without GdnHCl, the combined data are well fit by alpha-helical conformations. At [GdnHCl]=4.5 M, corresponding to the approximate denaturation midpoint, the combined data are well fit by a combination of alpha-helical and partially extended conformations at each site, but with a site-dependent population ratio. At [GdnHCl]=7.0 M, corresponding to the fully denatured state, the combined data are well fit by a combination of partially extended and polyproline II conformations, again with a site-dependent population ratio. Two entirely different models for conformational distributions lead to nearly the same best-fit distributions, demonstrating the robustness of these conclusions. This work represents the first quantitative investigation of site-specific conformational distributions in partially folded and unfolded states of a protein by solid-state NMR.
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Affiliation(s)
- Kan-Nian Hu
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Building 5, Room 112, Bethesda, MD 20892-0520, USA
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Mulder T, Harmandaris VA, Lyulin AV, van der Vegt NFA, Kremer K, Michels MAJ. Structural Properties of Atactic Polystyrene of Different Thermal History Obtained from a Multiscale Simulation. Macromolecules 2008. [DOI: 10.1021/ma800873z] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tim Mulder
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - V. A. Harmandaris
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Alexey V. Lyulin
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - N. F. A. van der Vegt
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - K. Kremer
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - M. A. J. Michels
- Group Polymer Physics, Eindhoven Polymer Laboratories, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands; and Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
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Mulder T, Harmandaris VA, Lyulin AV, van der Vegt NFA, Vorselaars B, Michels MAJ. Equilibration and Deformation of Amorphous Polystyrene: Scale-jumping Simulational Approach. MACROMOL THEOR SIMUL 2008. [DOI: 10.1002/mats.200800015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Uemura T, Horike S, Kitagawa K, Mizuno M, Endo K, Bracco S, Comotti A, Sozzani P, Nagaoka M, Kitagawa S. Conformation and Molecular Dynamics of Single Polystyrene Chain Confined in Coordination Nanospace. J Am Chem Soc 2008; 130:6781-8. [DOI: 10.1021/ja800087s] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Uemura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Satoshi Horike
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Kana Kitagawa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Motohiro Mizuno
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Kazunaka Endo
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Silvia Bracco
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Angiolina Comotti
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Piero Sozzani
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Masataka Nagaoka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
| | - Susumu Kitagawa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, PRESTO, Japan Science and Technology Agency (JST), Honcho Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan, Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, 20125 Milan, Italy, Department of Complex Systems Science
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Spyriouni T, Tzoumanekas C, Theodorou D, Müller-Plathe F, Milano G. Coarse-Grained and Reverse-Mapped United-Atom Simulations of Long-Chain Atactic Polystyrene Melts: Structure, Thermodynamic Properties, Chain Conformation, and Entanglements. Macromolecules 2007. [DOI: 10.1021/ma0700983] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Theodora Spyriouni
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Christos Tzoumanekas
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Doros Theodorou
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Florian Müller-Plathe
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
| | - Giuseppe Milano
- Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece, Institute of Physical Chemistry, NRCPS “Demokritos”, Aghia Paraskevi Attikis, 153 10 Athens, Greece, and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287
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Santangelo G, Matteo AD, Müller-Plathe F, Milano G. From Mesoscale Back to Atomistic Models: A Fast Reverse-Mapping Procedure for Vinyl Polymer Chains. J Phys Chem B 2007; 111:2765-73. [PMID: 17319712 DOI: 10.1021/jp066212l] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper introduces a systematic procedure to obtain well-relaxed atomistic melt structures from mesocale models of vinyl polymers based on sequences of diads. Following the methodology introduced by Milano and Müller-Plathe [J. Phys. Chem. B. 2005, 109, 18609], coarse-grain models consisting of sequences of superatoms of two different types meso and racemo have been used to relax mesocale melts of atactic and syndiotactic polystyrene. The proposed method, based on a fully geometrical approach, does not involve expensive potential energy and force evaluations and allows a very fast and efficient reconstruction of the atomistic detail. The method, successfully tested against experimental data, allows us to obtain all atom models of both stereoregular and stereoirregular polymers and opens the possibility of relaxing large molecular weight melts of vinyl chains.
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Affiliation(s)
- Giuseppe Santangelo
- STMicroelectronics c/o IMAST P.le Enrico Fermi, 1 Località Granatello, I-80055 Italy
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10
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Two-dimensional solid-state NMR studies of crystalline poly(ethylene oxide): Conformations and chemical shifts. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.09.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Miyoshi T, Pascui O, Reichert D. Slow Chain Dynamics in Isotactic-poly(4-methyl-1-pentene) Crystallites near the Glass Transition Temperature Characterized by Solid-State 13C MAS Exchange NMR. Macromolecules 2004. [DOI: 10.1021/ma049487c] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toshikazu Miyoshi
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo-Water-Front, 2-41-6 Aomi, Kohto-ku, Tokyo, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - Ovidiu Pascui
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo-Water-Front, 2-41-6 Aomi, Kohto-ku, Tokyo, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - D. Reichert
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo-Water-Front, 2-41-6 Aomi, Kohto-ku, Tokyo, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
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12
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Miyoshi T, Pascui O, Reichert D. Large-Amplitude Motions of Form III of Isotactic Poly(4-methyl-1-pentene) Crystallites Prior to Crystal−Crystal Transformation. Macromolecules 2004. [DOI: 10.1021/ma049323w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toshikazu Miyoshi
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo-Water-front, 2-41-6 Aomi, Kohto-ku, Tokyo, 135-0064, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - Ovidiu Pascui
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo-Water-front, 2-41-6 Aomi, Kohto-ku, Tokyo, 135-0064, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - D. Reichert
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo-Water-front, 2-41-6 Aomi, Kohto-ku, Tokyo, 135-0064, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
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13
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van Melick H, Govaert L, Raas B, Nauta W, Meijer H. Kinetics of ageing and re-embrittlement of mechanically rejuvenated polystyrene. POLYMER 2003. [DOI: 10.1016/s0032-3861(02)00863-7] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Miyoshi T, Pascui O, Reichert D. Helical Jump Motions in Isotactic Poly(4-methyl-1-pentene) Crystallites Revealed by 1D MAS Exchange NMR Spectroscopy. Macromolecules 2002. [DOI: 10.1021/ma025570t] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Toshikazu Miyoshi
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - Ovidiu Pascui
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - D. Reichert
- Research Center of Macromolecular Technology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, and Fachbereich Physik, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
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Kaji H, Schmidt-Rohr K. Conformation and Dynamics of Atactic Poly(acrylonitrile). 2. Torsion Angle Distributions in Meso Dyads from Two-Dimensional Solid-State Double-Quantum 13C NMR. Macromolecules 2001. [DOI: 10.1021/ma010657k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hironori Kaji
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, and Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011
| | - Klaus Schmidt-Rohr
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, and Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011
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16
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Kaji H, Schmidt-Rohr K. Conformation and Dynamics of Atactic Poly(acrylonitrile). 3. Characterization of Local Structure by Two-Dimensional 2H−13C Solid-State NMR. Macromolecules 2001. [DOI: 10.1021/ma010658c] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hironori Kaji
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011, Japan, and Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011
| | - Klaus Schmidt-Rohr
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011, Japan, and Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011
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17
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Dunbar MG, Sandström D, Schmidt-Rohr K. Characterization of Polystyrene Conformation by Solid-State NMR Correlation of C−2H and 13C−13C Bond Orientations. Macromolecules 2000. [DOI: 10.1021/ma992083d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. G. Dunbar
- Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - D. Sandström
- Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - K. Schmidt-Rohr
- Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, Massachusetts 01003
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18
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Kaji H, Schmidt-Rohr K. Conformation and Dynamics of Atactic Poly(acrylonitrile). 1. Trans/Gauche Ratio from Double-Quantum Solid-State 13C NMR of the Methylene Groups. Macromolecules 2000. [DOI: 10.1021/ma0002592] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hironori Kaji
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003
| | - Klaus Schmidt-Rohr
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003
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19
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Harris DJ, Bonagamba TJ, Hong M, Schmidt-Rohr K. Conformation of Poly(ethylene oxide)−Hydroxybenzene Molecular Complexes Studied by Solid-State NMR. Macromolecules 2000. [DOI: 10.1021/ma992087i] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D. J. Harris
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, Universidade de São Paulo, Instituto de Física de São Carlos, PO Box 369, 13560-970, São Carlos, São Paulo, Brazil, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - T. J. Bonagamba
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, Universidade de São Paulo, Instituto de Física de São Carlos, PO Box 369, 13560-970, São Carlos, São Paulo, Brazil, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - M. Hong
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, Universidade de São Paulo, Instituto de Física de São Carlos, PO Box 369, 13560-970, São Carlos, São Paulo, Brazil, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - K. Schmidt-Rohr
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, Universidade de São Paulo, Instituto de Física de São Carlos, PO Box 369, 13560-970, São Carlos, São Paulo, Brazil, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
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20
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Robyr P, Müller M, Suter UW. Atomistic Simulations of Glassy Polystyrenes with Realistic Chain Conformations. Macromolecules 1999. [DOI: 10.1021/ma991196u] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P. Robyr
- Institute of Polymers-Department of Materials, and Laboratory of Physical Chemistry, and Institute of Theoretical Computer Science-Department of Computer Science, ETH, CH-8092 Zurich, Switzerland
| | - M. Müller
- Institute of Polymers-Department of Materials, and Laboratory of Physical Chemistry, and Institute of Theoretical Computer Science-Department of Computer Science, ETH, CH-8092 Zurich, Switzerland
| | - U. W. Suter
- Institute of Polymers-Department of Materials, and Laboratory of Physical Chemistry, and Institute of Theoretical Computer Science-Department of Computer Science, ETH, CH-8092 Zurich, Switzerland
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