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Nitta K. Topological Characteristics of Chain Molecules with Branching and Molar‐Mass Distributions. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202000080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Koh‐hei Nitta
- Polymer Physics Laboratory, Institute of Science and Engineering Kanazawa University Kakuma Campus Kanazawa 920‐1192 Japan
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2
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Jangizehi A, Schmid F, Besenius P, Kremer K, Seiffert S. Defects and defect engineering in Soft Matter. SOFT MATTER 2020; 16:10809-10859. [PMID: 33306078 DOI: 10.1039/d0sm01371d] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Soft matter covers a wide range of materials based on linear or branched polymers, gels and rubbers, amphiphilic (macro)molecules, colloids, and self-assembled structures. These materials have applications in various industries, all highly important for our daily life, and they control all biological functions; therefore, controlling and tailoring their properties is crucial. One way to approach this target is defect engineering, which aims to control defects in the material's structure, and/or to purposely add defects into it to trigger specific functions. While this approach has been a striking success story in crystalline inorganic hard matter, both for mechanical and electronic properties, and has also been applied to organic hard materials, defect engineering is rarely used in soft matter design. In this review, we present a survey on investigations on defects and/or defect engineering in nine classes of soft matter composed of liquid crystals, colloids, linear polymers with moderate degree of branching, hyperbranched polymers and dendrimers, conjugated polymers, polymeric networks, self-assembled amphiphiles and proteins, block copolymers and supramolecular polymers. This overview proposes a promising role of this approach for tuning the properties of soft matter.
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Affiliation(s)
- Amir Jangizehi
- Johannes Gutenberg University Mainz, Department of Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
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3
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Kim I, Pascal TA, Park SJ, Diallo M, Goddard III WA, Jung Y. pH-Dependent Conformations for Hyperbranched Poly(ethylenimine) from All-Atom Molecular Dynamics. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02573] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- In Kim
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
| | - Tod A. Pascal
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Seong-Jik Park
- Department of Bioresources and Rural Systems Engineering, Hankyong National University, Kyonggi 17579, South Korea
| | - Mamadou Diallo
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
| | - William A. Goddard III
- Materials and Process Simulation Center, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Yousung Jung
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
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Mielke J, Dolgushev M. Relaxation Dynamics of Semiflexible Fractal Macromolecules. Polymers (Basel) 2016; 8:polym8070263. [PMID: 30974539 PMCID: PMC6432473 DOI: 10.3390/polym8070263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/28/2016] [Accepted: 07/01/2016] [Indexed: 11/21/2022] Open
Abstract
We study the dynamics of semiflexible hyperbranched macromolecules having only dendritic units and no linear spacers, while the structure of these macromolecules is modeled through T-fractals. We construct a full set of eigenmodes of the dynamical matrix, which couples the set of Langevin equations. Based on the ensuing relaxation spectra, we analyze the mechanical relaxation moduli. The fractal character of the macromolecules reveals itself in the storage and loss moduli in the intermediate region of frequencies through scaling, whereas at higher frequencies, we observe the locally-dendritic structure that is more pronounced for higher stiffness.
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Affiliation(s)
- Jonas Mielke
- Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany.
| | - Maxim Dolgushev
- Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany.
- Institut Charles Sadron, Université de Strasbourg & CNRS, 23 rue du Loess, 67034 Strasbourg Cedex, France.
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Yu C, Ma L, Li S, Tan H, Zhou Y, Yan D. HBP Builder: A Tool to Generate Hyperbranched Polymers and Hyperbranched Multi-Arm Copolymers for Coarse-grained and Fully Atomistic Molecular Simulations. Sci Rep 2016; 6:26264. [PMID: 27188541 PMCID: PMC4870682 DOI: 10.1038/srep26264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 04/28/2016] [Indexed: 12/31/2022] Open
Abstract
Computer simulation has been becoming a versatile tool that can investigate detailed information from the microscopic scale to the mesoscopic scale. However, the crucial first step of molecular simulation is model building, particularly for hyperbranched polymers (HBPs) and hyperbranched multi-arm copolymers (HBMCs) with complex and various topological structures. Unlike well-defined polymers, not only the molar weight of HBPs/HBMCs with polydispersity, but the HBPs/HBMCs with the same degree of polymerization (DP) and degree of branching (DB) also have many possible topological structures, thus making difficulties for user to build model in molecular simulation. In order to build a bridge between model building and molecular simulation of HBPs and HBMCs, we developed HBP Builder, a C language open source HBPs/HBMCs building toolkit. HBP Builder implements an automated protocol to build various coarse-grained and fully atomistic structures of HBPs/HBMCs according to user's specific requirements. Meanwhile, coarse-grained and fully atomistic output structures can be directly employed in popular simulation packages, including HOOMD, Tinker and Gromacs. Moreover, HBP Builder has an easy-to-use graphical user interface and the modular architecture, making it easy to extend and reuse it as a part of other program.
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Affiliation(s)
- Chunyang Yu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Li Ma
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Shanlong Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Haina Tan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Deyue Yan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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6
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Rabbel H, Frey H, Schmid F. Statistical properties of linear-hyperbranched graft copolymers prepared via “hypergrafting” of ABm monomers from linear B-functional core chains: A molecular dynamics simulation. J Chem Phys 2015; 143:243125. [DOI: 10.1063/1.4935371] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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Wawrzyńska E, Sikorski A, Zifferer G. Monte Carlo Simulation Studies of Regular and Irregular Dendritic Polymers. MACROMOL THEOR SIMUL 2015. [DOI: 10.1002/mats.201500036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Edyta Wawrzyńska
- Department of Physical Chemistry; University of Vienna; Währinger Str. 42 A-1090 Vienna Austria
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Andrzej Sikorski
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Gerhard Zifferer
- Department of Physical Chemistry; University of Vienna; Währinger Str. 42 A-1090 Vienna Austria
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Saeed HAM, Eltahir YA, Xia Y, Wang Y. Synthesis and characterization of aliphatic-aromatic hyperbranched polyesters with high organosolubility. RUSS J APPL CHEM+ 2014. [DOI: 10.1134/s1070427214100140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Affiliation(s)
- Miloš Netopilík
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovský Sq. 2 162 06 Prague 6 Czech Republic
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11
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Zhang H, Lin Y, Xu Y, Weng W. Mechanochemistry of Topological Complex Polymer Systems. Top Curr Chem (Cham) 2014; 369:135-207. [PMID: 25791486 DOI: 10.1007/128_2014_617] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Although existing since the concept of macromolecules, polymer mechanochemistry is a burgeoning field which attracts great scientific interest in its ability to bias conventional reaction pathways and its potential to fabricate mechanoresponsive materials. We review here the effect of topology on the mechanical degradation of polymer chains and the activation of mechanophores in polymer backbones. The chapter focuses on both experimental and theoretical work carried out in the past 70 years. After a general introduction (Sect. 1), where the concept, the history, and the application of polymer mechanochemistry are briefly described, flow fields to study polymer mechanochemistry are discussed (Sect. 2), results of mechanochemistry study are presented for linear polymers (Sect. 3), cyclic polymers (Sect. 4), graft polymers (Sect. 5), star-shaped polymers (Sect. 6), hyperbranched polymers and dendrimers (Sect. 7), and systems with dynamic topology (Sect. 8). Here we focus on (1) experimental results involving the topological effect on the coil-to-stretch transition and the fracture of the polymer chains, (2) the underlying mechanisms and the key factor that determines the mechanical stability of the macromolecules, (3) theoretical models that relate to the experimental observations, and (4) rational design of mechanophores in complex topology to achieve multiple activations according to the existing results observed in chain degradation.
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Affiliation(s)
- Huan Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Yangju Lin
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Yuanze Xu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Wengui Weng
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China.
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12
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Saeed HAM, Wang Y. Synthesis and characterization of A2 + B3 type hyperbranched aromatic-aliphatic polyester with carboxyl end groups. RUSS J APPL CHEM+ 2013. [DOI: 10.1134/s1070427213100157] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Lederer A, Burchard W, Khalyavina A, Lindner P, Schweins R. Gilt das universelle Gesetz für verzweigte Polymere? Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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14
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Lederer A, Burchard W, Khalyavina A, Lindner P, Schweins R. Is the Universal Law Valid for Branched Polymers? Angew Chem Int Ed Engl 2013; 52:4659-63. [DOI: 10.1002/anie.201209228] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 02/01/2013] [Indexed: 11/11/2022]
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15
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Netopilík M. Size-exclusion-chromatography separation of randomly branched polymers with tetrafunctional branch points and local dispersity. J Chromatogr A 2012; 1260:97-101. [PMID: 22985525 DOI: 10.1016/j.chroma.2012.08.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 08/13/2012] [Accepted: 08/16/2012] [Indexed: 10/28/2022]
Abstract
The SEC separation of a randomly branched polymer, in particular local dispersity due to branching, are theoretically examined. A model of the SEC separation of randomly branched polymer with tetrafunctional branch points enabling the estimation of local dispersity was developed. Measurable quantities (branching indices) were compared with real data. Local dispersity due to branching is demonstrated to depend on elution volume and degree of branching and in the area of the beginning of the elution curve it can reach non-negligible values.
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Affiliation(s)
- Miloš Netopilík
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic.
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16
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Kumar A, Biswas P. Conformational transitions in semiflexible dendrimers induced by bond orientations. J Chem Phys 2012; 137:124903. [DOI: 10.1063/1.4754871] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Filippov AP, Zamyshlyaeva OG, Tarabukina EB, Simonova MA, Kozlov AV, Semchikov YD. Structural and conformational properties of hyperbranched copolymers based on perfluorinated germanium hydrides. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x12050033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Zhu X, Zhou Y, Yan D. Influence of branching architecture on polymer properties. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/polb.22320] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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19
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Affiliation(s)
- Jaroslaw T. Bosko
- Department of Chemical Engineering, Monash University, Melbourne, Victoria 3800, Australia
| | - J. Ravi Prakash
- Department of Chemical Engineering, Monash University, Melbourne, Victoria 3800, Australia
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20
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Boye S, Komber H, Friedel P, Lederer A. Solution properties of selectively modified hyperbranched polyesters. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.06.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Konkolewicz D, Gray-Weale A, Perrier S. Describing the Structure of a Randomly Hyperbranched Polymer. MACROMOL THEOR SIMUL 2010. [DOI: 10.1002/mats.201000006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Konkolewicz D, Gray-Weale A, Perrier S. The structure of randomly branched polymers synthesized by living radical methods. Polym Chem 2010. [DOI: 10.1039/c0py00064g] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Le TC, Todd BD, Daivis PJ, Uhlherr A. The effect of interbranch spacing on structural and rheological properties of hyperbranched polymer melts. J Chem Phys 2009; 131:164901. [DOI: 10.1063/1.3247191] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Voit BI, Lederer A. Hyperbranched and Highly Branched Polymer Architectures—Synthetic Strategies and Major Characterization Aspects. Chem Rev 2009; 109:5924-73. [DOI: 10.1021/cr900068q] [Citation(s) in RCA: 942] [Impact Index Per Article: 62.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brigitte I. Voit
- Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany
| | - Albena Lederer
- Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany
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25
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Gray-Weale A, Gilbert RG. General description of the structure of branched polymers. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23458] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Combination of “living” nitroxide-mediated and photoiniferter-induced “grafting from” free-radical polymerizations: From branched copolymers to unimolecular micelles and microgels. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2009.02.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Le TC, Todd BD, Daivis PJ, Uhlherr A. Structural properties of hyperbranched polymers in the melt under shear via nonequilibrium molecular dynamics simulation. J Chem Phys 2009; 130:074901. [DOI: 10.1063/1.3077006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Dalakoglou GK, Karatasos K, Lyulin SV, Lyulin AV. Shear-induced effects in hyperbranched-linear polyelectrolyte complexes. J Chem Phys 2008; 129:034901. [DOI: 10.1063/1.2952518] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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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Bosko JT, Ravi Prakash J. Effect of molecular topology on the transport properties of dendrimers in dilute solution at Θ temperature: A Brownian dynamics study. J Chem Phys 2008; 128:034902. [DOI: 10.1063/1.2823034] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Canilho N, Scholl M, Klok HA, Mezzenga R. Thermotropic Ionic Liquid Crystals via Self-Assembly of Cationic Hyperbranched Polypeptides and Anionic Surfactants. Macromolecules 2007. [DOI: 10.1021/ma071558v] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nadia Canilho
- Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Ch. du Musée 3, CH-1700 Fribourg, Switzerland, Laboratoire des Polymères, Institut des Matériaux, École Polytechnique Fédérale de Lausanne, Bâtiment MXD, STI-IMX-LP, Station 12, CH-1015 Lausanne, Switzerland, and Nestlé Research Center, Vers-Chez-les-Blancs, 1000 Lausanne 26, Switzerland
| | - Markus Scholl
- Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Ch. du Musée 3, CH-1700 Fribourg, Switzerland, Laboratoire des Polymères, Institut des Matériaux, École Polytechnique Fédérale de Lausanne, Bâtiment MXD, STI-IMX-LP, Station 12, CH-1015 Lausanne, Switzerland, and Nestlé Research Center, Vers-Chez-les-Blancs, 1000 Lausanne 26, Switzerland
| | - Harm-Anton Klok
- Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Ch. du Musée 3, CH-1700 Fribourg, Switzerland, Laboratoire des Polymères, Institut des Matériaux, École Polytechnique Fédérale de Lausanne, Bâtiment MXD, STI-IMX-LP, Station 12, CH-1015 Lausanne, Switzerland, and Nestlé Research Center, Vers-Chez-les-Blancs, 1000 Lausanne 26, Switzerland
| | - Raffaele Mezzenga
- Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Ch. du Musée 3, CH-1700 Fribourg, Switzerland, Laboratoire des Polymères, Institut des Matériaux, École Polytechnique Fédérale de Lausanne, Bâtiment MXD, STI-IMX-LP, Station 12, CH-1015 Lausanne, Switzerland, and Nestlé Research Center, Vers-Chez-les-Blancs, 1000 Lausanne 26, Switzerland
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31
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Richards EL, Buzza DMA, Davies GR. Monte Carlo Simulation of Random Branching in Hyperbranched Polymers. Macromolecules 2007. [DOI: 10.1021/ma0700126] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Louise Richards
- Department of Computing, Leeds Metropolitan University, Leeds LS6 3QS, UK; Department of Physics, University of Hull, Hull HU6 7RX, UK; and Polymers & Complex Fluids Group and Polymer IRC, School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
| | - D. Martin A. Buzza
- Department of Computing, Leeds Metropolitan University, Leeds LS6 3QS, UK; Department of Physics, University of Hull, Hull HU6 7RX, UK; and Polymers & Complex Fluids Group and Polymer IRC, School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
| | - Geoff R. Davies
- Department of Computing, Leeds Metropolitan University, Leeds LS6 3QS, UK; Department of Physics, University of Hull, Hull HU6 7RX, UK; and Polymers & Complex Fluids Group and Polymer IRC, School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
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Watts CJC, Gray-Weale A, Gilbert RG. Interpreting Size-Exclusion Data for Highly Branched Biopolymers by Reverse Monte Carlo Simulations. Biomacromolecules 2007; 8:455-63. [PMID: 17291069 DOI: 10.1021/bm0605199] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Size-exclusion chromatography with multiple detection provides data on the distributions of various properties in a branched polymer sample, for example, distributions of the number, average mass, mean-squared mass, and branching fraction against hydrodynamic volume. A method is developed that provides a basis to use such data for obtaining structural and biosynthetic information on highly branched polymers, such as amylopectin. We generate by simulation a reference distribution of randomly branched polymers from the experimental distribution of debranched chains of the target polymer. We then select from these simulated chains a set with the same number (or other) distribution as the actual polymer sample, using reverse Monte Carlo simulations. Properties of these model polymers are used to interpret the differences with experiment as due to correlations in branching structure. The same methodology can be applied to data from other separation techniques such as field-flow fractionation and high-performance anionic exchange chromatography.
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Affiliation(s)
- Christopher J C Watts
- Key Centre for Polymer Colloids, School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
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Mulder T, Lyulin AV, van der Schoot P, Michels MAJ. Architecture and Conformation of Uncharged and Charged Hyperbranched Polymers: Computer Simulation and Mean-Field Theory. Macromolecules 2005. [DOI: 10.1021/ma049612k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T. Mulder
- Group Polymer Physics, Eindhoven Polymer Laboratories and Dutch Polymer Institute, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - A. V. Lyulin
- Group Polymer Physics, Eindhoven Polymer Laboratories and Dutch Polymer Institute, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Paul van der Schoot
- Group Polymer Physics, Eindhoven Polymer Laboratories and Dutch Polymer Institute, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - M. A. J. Michels
- Group Polymer Physics, Eindhoven Polymer Laboratories and Dutch Polymer Institute, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Löwe H, Müller P, Zippelius A. Rheology of gelling polymers in the Zimm model. J Chem Phys 2005; 122:14905. [PMID: 15638698 DOI: 10.1063/1.1813433] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In order to study rheological properties of gelling systems in dilute solution, we investigate the viscosity and the normal stresses in the Zimm model [B. H. Zimm, J. Chem. Phys. 24, 269 (1956)]. for randomly cross-linked monomers. The distribution of cluster topologies and sizes is assumed to be given either by Erdos-Renyi random graphs or three-dimensional bond percolation. Within this model the critical behavior of the viscosity and of the first normal stress coefficient is determined by the power-law scaling of their averages over clusters of a given size n with n. We investigate these scaling relations numerically and conclude that the scaling exponents are independent of the hydrodynamic interaction strength. The numerically determined exponents agree well with experimental data for branched polymers. However, we show that this traditional model of polymer physics is not able to yield a critical divergence at the gel point of the viscosity for a polydisperse dilute solution of gelation clusters. A generally accepted scaling relation for the Zimm exponent of the viscosity is thereby disproved.
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Affiliation(s)
- Henning Löwe
- Institut für Theoretische Physik, Georg-August-Universität, D-37077 Göttingen, Germany.
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Bosko JT, Todd BD, Sadus RJ. Internal structure of dendrimers in the melt under shear: A molecular dynamics study. J Chem Phys 2004; 121:1091-6. [PMID: 15260644 DOI: 10.1063/1.1755659] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The molecular structure of fluids composed of dendrimers of different generations is studied using nonequilibrium molecular dynamics (NEMD). NEMD results for dendrimer melts undergoing planar Couette flow are reported and analyzed with particular attention paid to the shear-induced changes in the internal structure of dendrimers. The radii of gyration, pair distribution functions and the fractal dimensionality of the dendrimers are determined at different strain rates. The location of the terminal groups is analyzed and found to be uniformly distributed throughout the space occupied by the molecules. The fractal dimension as a function of strain rate displays crossover behavior analogous to the Newtonian/non-Newtonian transition of shear viscosity.
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Affiliation(s)
- Jaroslaw T Bosko
- Centre for Molecular Simulation, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
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Neelov IM, Adolf DB. Brownian Dynamics Simulation of Hyperbranched Polymers under Elongational Flow. J Phys Chem B 2004. [DOI: 10.1021/jp030994q] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Igor M. Neelov
- Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - David B. Adolf
- Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom
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Neelov IM, Adolf DB. Brownian Dynamics Simulations of Dendrimers under Elongational Flow: Bead−Rod Model with Hydrodynamic Interactions. Macromolecules 2003. [DOI: 10.1021/ma030088b] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Igor M. Neelov
- Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
| | - David B. Adolf
- Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
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