1
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Zhao J, Chen P, Lin Y, Chang J, Lu A, Chen W, Meng L, Wang D, Li L. Stretch-Induced Crystallization and Phase Transitions of Poly(dimethylsiloxane) at Low Temperatures: An in Situ Synchrotron Radiation Wide-Angle X-ray Scattering Study. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01872] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jingyun Zhao
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
| | - Pinzhang Chen
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
| | - Yuanfei Lin
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
| | - Jiarui Chang
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
| | - Ai Lu
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
| | - Wei Chen
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
| | - Lingpu Meng
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
| | - Daoliang Wang
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
| | - Liangbin Li
- National Synchrotron Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, China
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2
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Park GW, Ianniruberto G. Flow-Induced Nematic Interaction and Friction Reduction Successfully Describe PS Melt and Solution Data in Extension Startup and Relaxation. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00208] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gun Woo Park
- Department of Chemical, Materials,
and Production Engineering, Federico II University, Piazzale
Tecchio 80, 80125 Napoli, Italy
| | - Giovanni Ianniruberto
- Department of Chemical, Materials,
and Production Engineering, Federico II University, Piazzale
Tecchio 80, 80125 Napoli, Italy
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3
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Zha L, Zhang M, Li L, Hu W. Entropy-Driven Segregation and Its Competition with Crystal Nucleation in the Binary Blends of Stretched and Free Guest Polymers. J Phys Chem B 2016; 120:12988-12992. [DOI: 10.1021/acs.jpcb.6b08399] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Liyun Zha
- School
of Chemistry and Chemical Engineering, State Key Lab of Coordination
Chemistry, Nanjing University, Nanjing 210023, China
| | - Miaomiao Zhang
- School
of Chemistry and Chemical Engineering, State Key Lab of Coordination
Chemistry, Nanjing University, Nanjing 210023, China
| | - Liangbin Li
- Lab
of Soft Matter Chemistry, Chinese University of Science and Technology, Hefei 230026, China
| | - Wenbing Hu
- School
of Chemistry and Chemical Engineering, State Key Lab of Coordination
Chemistry, Nanjing University, Nanjing 210023, China
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4
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Katashima T, Urayama K, Chung UI, Sakai T. Probing the cross-effect of strains in non-linear elasticity of nearly regular polymer networks by pure shear deformation. J Chem Phys 2015; 142:174908. [DOI: 10.1063/1.4919653] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Takuya Katashima
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kenji Urayama
- Department of Macromolecular Science and Engineering, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8585, Japan
| | - Ung-il Chung
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takamasa Sakai
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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5
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Pérez-Aparicio R, Schiewek M, Valentín JL, Schneider H, Long DR, Saphiannikova M, Sotta P, Saalwächter K, Ott M. Local Chain Deformation and Overstrain in Reinforced Elastomers: An NMR Study. Macromolecules 2013. [DOI: 10.1021/ma400921k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roberto Pérez-Aparicio
- Laboratoire Polymères
et Matériaux Avancés, CNRS/Rhodia-Solvay, UMR 5268, 85 avenue des Frères Perret, F-69192 Saint Fons,
France
| | - Martin Schiewek
- Institut für
Physik -
NMR, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, D-06120 Halle, Germany
| | - Juan López Valentín
- Institute of Polymer Science and Technology (ICTP-CSIC), C/Juan de la Cierva
3, 28006 Madrid, Spain
| | - Horst Schneider
- Institut für
Physik -
NMR, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, D-06120 Halle, Germany
| | - Didier R. Long
- Laboratoire Polymères
et Matériaux Avancés, CNRS/Rhodia-Solvay, UMR 5268, 85 avenue des Frères Perret, F-69192 Saint Fons,
France
| | - Marina Saphiannikova
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse
6, D-01069 Dresden, Germany
| | - Paul Sotta
- Laboratoire Polymères
et Matériaux Avancés, CNRS/Rhodia-Solvay, UMR 5268, 85 avenue des Frères Perret, F-69192 Saint Fons,
France
| | - Kay Saalwächter
- Institut für
Physik -
NMR, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, D-06120 Halle, Germany
| | - Maria Ott
- Institut für
Physik -
NMR, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, D-06120 Halle, Germany
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6
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Aguilera-Mercado BM, Cohen C, Escobedo FA. Extraction of Segment Orientation Distributions in Polymer Networks by Inversion of 2H NMR Spectra through the Maximum-Entropy Method. Macromolecules 2009. [DOI: 10.1021/ma9017179] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Claude Cohen
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853
| | - Fernando A. Escobedo
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853
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7
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Albunia AR, Graf R, Grassi A, Guerra G, Spiess HW. Geometry of Complex Molecular Motions of Guest Molecules in Polymers from Solid State 2H NMR. Macromolecules 2009. [DOI: 10.1021/ma900994z] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexandra R. Albunia
- Dipartimento di Chimica, Università degli Studi di Salerno and INSTM Research Unit, Via Ponte don Melillo, I-84084 Fisciano (Salerno), Italy
| | - Robert Graf
- Max Planck Institute for Polymer Research, Postfach 3148, D-55021 Mainz, Germany
| | - Alfonso Grassi
- Dipartimento di Chimica, Università degli Studi di Salerno and INSTM Research Unit, Via Ponte don Melillo, I-84084 Fisciano (Salerno), Italy
| | - Gaetano Guerra
- Dipartimento di Chimica, Università degli Studi di Salerno and INSTM Research Unit, Via Ponte don Melillo, I-84084 Fisciano (Salerno), Italy
| | - Hans W. Spiess
- Max Planck Institute for Polymer Research, Postfach 3148, D-55021 Mainz, Germany
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8
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Li L, de Jeu WH. Flow-induced mesophases in crystallizable polymers. ADVANCES IN POLYMER SCIENCE 2005. [DOI: 10.1007/b107175] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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Abstract
We describe a series of molecular dynamics computations that reveal an intimate connection at the atomic scale between difference stress (which resists stretches) and pressure (which resists volume changes) in an idealized elastomer, in contrast to the classical theory of rubber elasticity. Our simulations idealize the elastomer as a "pearl necklace," in which the covalent bonds are stiff linear springs, while nonbonded atoms interact through a Lennard-Jones potential with energy epsilon(LJ) and radius sigma(LJ). We calculate the difference stress t(11)-(t(22)+t(33))/2 and mean stress (t(11)+t(22)+t(33))/3 induced by a constant volume extension in the x(1) direction, as a function of temperature T and reduced density rho(*)=Nsigma(IJ) (3)/nu. Here, N is the number of atoms in the simulation cell and nu is the cell volume. Results show that for rho(*)<1, the difference stress is purely entropic and is in good agreement with the classical affine network model of rubber elasticity, which neglects nonbonded interactions. However, data presented by van Krevelen [Properties of Polymers, 3rd ed. (Elsevier, Amsterdam, 1990), p. 79] indicate that rubber at standard conditions corresponds to rho(*)=1.2. For rho(*)>1, the system is entropic for kT/epsilon(LJ)>2, but at lower temperatures the difference stress contains an additional energy component, which increases as rho(*) increases and temperature decreases. Finally, the model exhibits a glass transition for rho(*)=1.2 and kT/epsilon(LJ) approximately 2. The atomic-scale processes responsible for generating stress are explored in detail. Simulations demonstrate that the repulsive portion of the Lennard-Jones potential provides a contribution sigma(nbr)>0 to the difference stress, the attractive portion provides sigma(nba) approximately 0, while the covalent bonds provide sigma(b)<0. In contrast, their respective contributions to the mean stress satisfy Pi(nbr)<0, Pi(nba)>0, and Pi(b)<0. Analytical calculations, together with simulations, demonstrate that mean and difference stresses are related by sigma(nbr)=-APi(nbr)P(2)(theta(b)), sigma(b)=BPi(b)P(2)(theta(b)), where P(2)(theta(b)) is a measure of the anisotropy of the orientation of the covalent bonds, and A and B are coefficients that depend weakly on rho(*) and temperature. For high values of rho(*), we find that [sigma(nbr)]>>[sigma(b)], and in this regime our model predicts behavior that is in good agreement with experimental data of D.L. Quested et al. [J. Appl. Phys. 52, 5977 (1981)] for the influence of pressure on the difference stress induced by stretching solithane.
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Affiliation(s)
- A F Bower
- Division of Engineering, Brown University, Providence, Rhode Island 02912, USA.
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