1
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Meng Z, Wang Y, Luo Y, Luo Z, Li L, Sha Y. Controllable Synthesis of Chain Center Dye-Labeled Star Polymers for Quantitative Examination of Interchain Conformation by Time-Resolved Fluorescence Resonance Energy Transfer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39190808 DOI: 10.1021/acs.langmuir.4c02411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Using a "core-first" approach with atom transfer radical polymerization, fluorescent center-functional star polymers of equivalent molecular weight but with varying numbers of arms (di-, tri-, and tetra-arm) were prepared. The sensitivity of fluorescence, combined with a dye-labeling technique introducing a fluorescent donor (carbazole) and an acceptor (anthracene) at the center of poly(methyl methacrylate) (PMMA) chains, enabled the application of time-resolved fluorescence resonance energy transfer to obtain quantitative insights into the conformation of the star polymer chains in the film state. When the results of star-branched polymers were compared with those of linear polymers of identical type and molecular weight, the impact of branching on polymer behavior was isolated for examination. Although the star topology does not alter the average intercoil distance, it affects the distance dispersity. Star polymers with higher arm numbers display decreased dispersity from distance due to reduced intermolecular aggregation at their geometric centers. This study presents the first spectroscopic evidence regarding the distribution of geometric centers in star polymers, offering a physical understanding of chain interpenetration and entanglement within star polymers.
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Affiliation(s)
- Zihao Meng
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Ying Wang
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Yanlong Luo
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Zhenyang Luo
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Linling Li
- Institute of Critical Materials for Integrated Circuits, Shenzhen Polytechnic University, Shenzhen, Guangdong 518055, China
| | - Ye Sha
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China
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2
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Nikolakakou G, Pantazidis C, Papadakis VM, Kenanakis G, Loppinet B, Sakellariou G, Glynos E. Nanostructured Single-ion Polymer Blend Electrolytes Composed of Polyanionic Particles and Low Molecular Weight PEO. ACS Macro Lett 2023; 12:1665-1671. [PMID: 37992200 DOI: 10.1021/acsmacrolett.3c00543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
The development of single-ion solid polymer electrolytes with high ion conductivity holds the key to the realization of safe, long-lasting, high-energy batteries. Here we introduce the use of core-shell nanostructured polyanionic particles, composed of polyanion asymmetric miktoarm stars with a large number of glassy polystyrene-based polyanion arms that complement longer poly(ethylene oxide), PEO, arms, as additives to low molecular weight, liquid PEO. Due to the proposed macromolecular design approach, the polyanion particles are well dispersed for wt % ≤ 55 that enables the formation of a nanostructured single-ion electrolyte with highly interconnected channels composed of liquid PEO that promotes fast ion transport. Noticeably, while the ion conductivity remains fairly unaffected and close to 10-5 S/cm at room temperature with nanoparticle loading, the shear modulus monotonically increases by several order of magnitudes indicating a very strong decoupling between the antagonistic properties of mechanical modulus and ion conductivity.
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Affiliation(s)
- Georgia Nikolakakou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 711 10 Heraklion, Crete, Greece
- Department of Chemistry, University of Crete, P.O. Box 2208, 710 03 Heraklion, Crete, Greece
| | - Christos Pantazidis
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografrou, 15 771 Athens, Greece
| | - Vassilis M Papadakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 711 10 Heraklion, Crete, Greece
- Department of Industrial Design and Production Engineering, University of West Attica, 12244 Athens, Greece
| | - George Kenanakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 711 10 Heraklion, Crete, Greece
| | - Benoit Loppinet
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 711 10 Heraklion, Crete, Greece
| | - Georgios Sakellariou
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografrou, 15 771 Athens, Greece
| | - Emmanouil Glynos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 711 10 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 71003, Greece
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3
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Horkay F, Chremos A, Douglas JF, Jones R, Lou J, Xia Y. Comparative experimental and computational study of synthetic and natural bottlebrush polyelectrolyte solutions. J Chem Phys 2021; 155:074901. [PMID: 34418934 PMCID: PMC8491617 DOI: 10.1063/5.0061649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 07/30/2021] [Indexed: 11/14/2022] Open
Abstract
We systematically investigate model synthetic and natural bottlebrush polyelectrolyte solutions through an array of experimental techniques (osmometry and neutron and dynamic light scattering) along with molecular dynamics simulations to characterize and contrast their structures over a wide range of spatial and time scales. In particular, we perform measurements on solutions of aggrecan and the synthetic bottlebrush polymer, poly(sodium acrylate), and simulations of solutions of highly coarse-grained charged bottlebrush molecules having different degrees of side-branch density and inclusion of an explicit solvent and ion hydration effects. While both systems exhibit a general tendency toward supramolecular organization in solution, bottlebrush poly(sodium acrylate) solutions exhibit a distinctive "polyelectrolyte peak" in their structure factor, but no such peak is observed in aggrecan solutions. This qualitative difference in scattering properties, and thus polyelectrolyte solution organization, is attributed to a concerted effect of the bottlebrush polymer topology and the solvation of the polymer backbone and counterions. The coupling of the polyelectrolyte topological structure with the counterion distribution about the charged polymer molecules along with direct polymer segmental hydration makes their solution organization and properties "tunable," a phenomenon that has significant ramifications for biological function and disease as well as for numerous materials applications.
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Affiliation(s)
- Ferenc Horkay
- Section on Quantitative Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Alexandros Chremos
- Section on Quantitative Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Jack F. Douglas
- Material Measurement Laboratory, Material Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Ronald Jones
- Material Measurement Laboratory, Material Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Junzhe Lou
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Yan Xia
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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4
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Zhang W, Douglas JF, Chremos A, Starr FW. Structure and Dynamics of Star Polymer Films from Coarse-Grained Molecular Simulations. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00504] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wengang Zhang
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Alexandros Chremos
- Section on Quantitative Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Francis W. Starr
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459, United States
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5
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Tilahun M, Tatek YB. End‐Pulled Translocation of a Star Polymer Out of a Confining Cylindrical Cavity. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202000090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mesay Tilahun
- Department of Physics Addis Ababa University Addis Ababa 1176 Ethiopia
| | - Yergou B. Tatek
- Department of Physics Addis Ababa University Addis Ababa 1176 Ethiopia
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6
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Bačová P, Glynos E, Anastasiadis SH, Harmandaris V. How Does the Number of Arms Affect the Properties of Mikto-Arm Stars in a Selective Oligomeric Matrix? Insights from Atomistic Simulations. ACS OMEGA 2021; 6:1138-1148. [PMID: 33490773 PMCID: PMC7818313 DOI: 10.1021/acsomega.0c04167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/17/2020] [Indexed: 05/14/2023]
Abstract
We present a simulation study of amphiphilic mikto-arm star copolymers in a selective polymer host. By means of atomistic molecular dynamics simulations, we examine the structural and dynamical properties of mikto-arm stars with varying number, n, of poly(ethylene oxide) (PEO) and polystyrene (PS) arms, (PEO) n (PS) n in a 33% wt blend with an oligomeric PEO host (o-PEO). As the number of arms increases, the stars resemble more spherical particles with less separated PEO and PS intramolecular domains. As a result of their internal morphology and associated geometrical constraints, the mikto-arm stars self-assemble either into cylindrical-like objects or a percolated network with increasing n, within the o-PEO matrix. The segmental dynamics is mostly governed by the star architecture and the heterogeneous local environment, formed by the intra- and intermolecular nanosegregation. We discuss the role of each factor and compare the results with previously published studies on mikto-arm stars.
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Affiliation(s)
- Petra Bačová
- Institute
of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Crete, Greece
| | - Emmanouil Glynos
- Institute
of Electronic Structure and Laser, Foundation
for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Crete, Greece
| | - Spiros H. Anastasiadis
- Institute
of Electronic Structure and Laser, Foundation
for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Crete, Greece
- Department
of Chemistry, University of Crete, GR-70013 Heraklion, Crete, Greece
| | - Vagelis Harmandaris
- Institute
of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Crete, Greece
- Department
of Mathematics and Applied Mathematics, University of Crete, GR-70013 Heraklion, Crete, Greece
- Computation-Based
Science and Technology Research Center, The Cyprus Institute, 20 Constantinou Kavafi Street, 2121 Nicosia, Cyprus
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7
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Liu A, Yang Z, Liu L, Chen J, An L. Role of Functionality in Cross-Stream Migration, Structures, and Dynamics of Star Polymers in Poiseuille Flow. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aiqing Liu
- College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Zhenyue Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Lijun Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Jizhong Chen
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Lijia An
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
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8
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Gkolfi E, Bačová P, Harmandaris V. Size and Shape Characteristics of Polystyrene and Poly(ethylene oxide) Star Polymer Melts Studied By Atomistic Simulations. MACROMOL THEOR SIMUL 2020. [DOI: 10.1002/mats.202000067] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eirini Gkolfi
- Department of Mathematics and Applied Mathematics University of Crete Heraklion Crete GR‐71409 Greece
- Institute of Applied and Computational Mathematics (IACM) Foundation for Research and Technology Hellas (FORTH) Heraklion Crete GR‐70013 Greece
| | - Petra Bačová
- Institute of Applied and Computational Mathematics (IACM) Foundation for Research and Technology Hellas (FORTH) Heraklion Crete GR‐70013 Greece
| | - Vagelis Harmandaris
- Department of Mathematics and Applied Mathematics University of Crete Heraklion Crete GR‐71409 Greece
- Institute of Applied and Computational Mathematics (IACM) Foundation for Research and Technology Hellas (FORTH) Heraklion Crete GR‐70013 Greece
- Computation‐Based Science and Technology Research Center The Cyprus Institute 20 Constantinou Kavafi Str. Nicosia 2121 Cyprus
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9
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Fan J, Emamy H, Chremos A, Douglas JF, Starr FW. Dynamic heterogeneity and collective motion in star polymer melts. J Chem Phys 2020; 152:054904. [DOI: 10.1063/1.5135731] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jinpeng Fan
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459-0155, USA
| | - Hamed Emamy
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459-0155, USA
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Alexandros Chremos
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Francis W. Starr
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459-0155, USA
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10
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Giuntoli A, Chremos A, Douglas JF. Influence of polymer topology on crystallization in thin films. J Chem Phys 2020; 152:044501. [DOI: 10.1063/1.5134983] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Andrea Giuntoli
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA
| | - Alexandros Chremos
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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11
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Bichler KJ, Jakobi B, Huber SO, Gilbert EP, Schneider GJ. Structural Analysis of Ultrasoft PDMS-g-PDMS Shell-Only Particles. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01598] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | | | | | - Elliot P. Gilbert
- Australian Centre for Neutron Scattering, Australia Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
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12
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Wang Z, Faraone A, Yin P, Porcar L, Liu Y, Do C, Hong K, Chen WR. Dynamic Equivalence between Soft Star Polymers and Hard Spheres. ACS Macro Lett 2019; 8:1467-1473. [PMID: 35651190 DOI: 10.1021/acsmacrolett.9b00617] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding the dynamics of soft colloids, such as star polymers, dendrimers, and microgels, is of scientific and practical importance. It is known that the excluded volume effect plays a key role in colloidal dynamics. Here, we propose a condition of compressibility equivalence that provides a simple method to experimentally evaluate the excluded volume of soft colloids from a thermodynamic view. We apply this condition to survey the dynamics of a series of star polymer dispersions. It is found that, as the concentration increases, the slowing of the long-time self-diffusivity of the star polymer, normalized by the short-time self-diffusivity, can be mapped onto the hard-sphere behavior. This phenomenon reveals the dynamic equivalence between soft colloids and hard spheres, despite the apparent complexity of the interparticle interaction of the soft colloids. The methods for measuring the osmotic compressibility and the self-diffusivities of soft colloidal dispersions are also presented.
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Affiliation(s)
- Zhe Wang
- Department of Engineering Physics and Key Laboratory of Particle and Radiation Imaging (Tsinghua University) of Ministry of Education, Tsinghua University, Beijing 100084, China.,Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Antonio Faraone
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6100, United States
| | - Panchao Yin
- South China Advanced Institute for Soft Matter Science and Technology, South China University of Technology, Guangzhou 510640, China
| | - Lionel Porcar
- Institut Laue-Langevin, B.P. 156, F-38042 Grenoble CEDEX 9, France
| | - Yun Liu
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6100, United States
| | - Changwoo Do
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kunlun Hong
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Wei-Ren Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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13
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Otsuka I, Zhang X, Winnik FM. Phototropic Multiresponsive Active Nanogels. Macromol Rapid Commun 2019; 40:e1900479. [DOI: 10.1002/marc.201900479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/11/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Issei Otsuka
- Université Grenoble AlpesCNRSCERMAV CS40700 38041 Grenoble Cedex 9 France
- Department of ChemistryUniversité de Montréal CP 6128 Succursale Centre Ville Montreal QC H3C 3J7 Canada
| | - Xuewei Zhang
- Department of ChemistryUniversité de Montréal CP 6128 Succursale Centre Ville Montreal QC H3C 3J7 Canada
| | - Françoise M. Winnik
- Department of ChemistryUniversité de Montréal CP 6128 Succursale Centre Ville Montreal QC H3C 3J7 Canada
- Department of ChemistryUniversity of Helsinki PB 55 Helsinki FI00140 Finland
- International Center for Materials Nanoarchitectonics (MANA)National Institute for Materials Science (NIMS) 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan
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14
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Gury L, Gauthier M, Cloitre M, Vlassopoulos D. Colloidal Jamming in Multiarm Star Polymer Melts. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00674] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Léo Gury
- Foundation for Research and Technology Hellas, Institute of Electronic Structure & Laser, Nikolaou Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, Vassilika Vouton, 70013 Heraklion, Crete, Greece
| | - Mario Gauthier
- Department of Chemistry, Institute for Polymer Research, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Michel Cloitre
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France
| | - Dimitris Vlassopoulos
- Foundation for Research and Technology Hellas, Institute of Electronic Structure & Laser, Nikolaou Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, Vassilika Vouton, 70013 Heraklion, Crete, Greece
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15
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Katkar HH, Muthukumar M. Single molecule electrophoresis of star polymers through nanopores: Simulations. J Chem Phys 2018; 149:163306. [PMID: 30384726 DOI: 10.1063/1.5029980] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We study the translocation of charged star polymers through a solid-state nanopore using coarse-grained Langevin dynamics simulations, in the context of using nanopores as high-throughput devices to characterize polymers based on their architecture. The translocation is driven by an externally applied electric field. Our key observation is that translocation kinetics is highly sensitive to the functionality (number of arms) of the star polymer. The mean translocation time is found to vary non-monotonically with polymer functionality, exhibiting a critical value for which translocation is the fastest. The origin of this effect lies in the competition between the higher driving force inside the nanopore and inter-arm electrostatic repulsion in entering the pore, as the functionality is increased. Our simulations also show that the value of the critical functionality can be tuned by varying nanopore dimensions. Moreover, for narrow nanopores, star polymers above a threshold functionality do not translocate at all. These observations suggest the use of nanopores as a high-throughput low-cost analytical tool to characterize and separate star polymers.
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Affiliation(s)
- H H Katkar
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - M Muthukumar
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA
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16
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Menichetti R, Pelissetto A, Randisi F. Thermodynamics of star polymer solutions: A coarse-grained study. J Chem Phys 2018; 146:244908. [PMID: 28668065 DOI: 10.1063/1.4989476] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We consider a coarse-grained (CG) model with pairwise interactions, suitable to describe low-density solutions of star-branched polymers of functionality f. Each macromolecule is represented by a CG molecule with (f + 1) interaction sites, which captures the star topology. Potentials are obtained by requiring the CG model to reproduce a set of distribution functions computed in the microscopic model in the zero-density limit. Explicit results are given for f = 6, 12, and 40. We use the CG model to compute the osmotic equation of state of the solution for concentrations c such that Φp=c∕c*≲1, where c* is the overlap concentration. We also investigate in detail the phase diagram for f = 40, identifying the boundaries of the solid intermediate phase. Finally, we investigate how the polymer size changes with c. For Φp≲0.3, polymers become harder as f increases at fixed reduced concentration c∕c*. On the other hand, for Φp≳0.3, polymers show the opposite behavior: At fixed Φp, the larger the value of f, the larger their size reduction is.
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Affiliation(s)
- Roberto Menichetti
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Andrea Pelissetto
- Dipartimento di Fisica, Sapienza Università di Roma and INFN, Sezione di Roma I, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - Ferdinando Randisi
- Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, Oxford OX1 3NP, United Kingdom
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17
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Haydukivska K, Blavatska V. Universal size properties of a star-ring polymer structure in disordered environments. Phys Rev E 2018; 97:032502. [PMID: 29776140 DOI: 10.1103/physreve.97.032502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Indexed: 01/24/2023]
Abstract
We consider the complex polymer system, consisting of a ring polymer connected to the f_{1}-branched starlike structure, in a good solvent in the presence of structural inhomogeneities. In particular cases f_{1}=1 and f_{1}=2, such a system restores the synthesized tadpole-shaped polystyrenes [Doi et al., Macromolecules 46, 1075 (2013)MAMOBX0024-929710.1021/ma302511j]. We assume that structural defects are correlated at large distances x according to a power law x^{-a}. Applying the direct polymer renormalization approach, we evaluate the universal size characteristics such as the ratio of the radii of gyration of star-ring and star topologies, and compare the effective sizes of single arms in complex structures and isolated polymers of the same total molecular weight. The nontrivial impact of disorder on these quantities is analyzed.
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Affiliation(s)
- K Haydukivska
- Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 79011 Lviv, Ukraine
| | - V Blavatska
- Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 79011 Lviv, Ukraine
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18
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The influence of the molecular structure of copolymers Dextran-poly-N-isopropylacrylamide on conformational transition characteristics. Polym J 2017. [DOI: 10.15407/polymerj.39.02.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Haydukivska K, Blavatska V. Probability of loops formation in star polymers in long range correlated disorder. J Chem Phys 2017. [DOI: 10.1063/1.4983127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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20
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Napolitano S, Glynos E, Tito NB. Glass transition of polymers in bulk, confined geometries, and near interfaces. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:036602. [PMID: 28134134 DOI: 10.1088/1361-6633/aa5284] [Citation(s) in RCA: 247] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
When cooled or pressurized, polymer melts exhibit a tremendous reduction in molecular mobility. If the process is performed at a constant rate, the structural relaxation time of the liquid eventually exceeds the time allowed for equilibration. This brings the system out of equilibrium, and the liquid is operationally defined as a glass-a solid lacking long-range order. Despite almost 100 years of research on the (liquid/)glass transition, it is not yet clear which molecular mechanisms are responsible for the unique slow-down in molecular dynamics. In this review, we first introduce the reader to experimental methodologies, theories, and simulations of glassy polymer dynamics and vitrification. We then analyse the impact of connectivity, structure, and chain environment on molecular motion at the length scale of a few monomers, as well as how macromolecular architecture affects the glass transition of non-linear polymers. We then discuss a revised picture of nanoconfinement, going beyond a simple picture based on interfacial interactions and surface/volume ratio. Analysis of a large body of experimental evidence, results from molecular simulations, and predictions from theory supports, instead, a more complex framework where other parameters are relevant. We focus discussion specifically on local order, free volume, irreversible chain adsorption, the Debye-Waller factor of confined and confining media, chain rigidity, and the absolute value of the vitrification temperature. We end by highlighting the molecular origin of distributions in relaxation times and glass transition temperatures which exceed, by far, the size of a chain. Fast relaxation modes, almost universally present at the free surface between polymer and air, are also remarked upon. These modes relax at rates far larger than those characteristic of glassy dynamics in bulk. We speculate on how these may be a signature of unique relaxation processes occurring in confined or heterogeneous polymeric systems.
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Affiliation(s)
- Simone Napolitano
- Laboratory of Polymer and Soft Matter Dynamics, Faculté des Sciences, Université Libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium
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Abstract
Drug targeting to specific organs and tissues is one of the crucial endeavors of modern pharmacotherapy. Controlled targeting at the site of action and reduced time of exposure of nontargeted tissues increase the efficacy of the treatment and reduce toxicity and side effects, improving compliance and convenience. Nanocarriers based on the branched copolymers dextran-graft-polyacrylamide were synthesized and characterized and were tested on phagocytic cells. It was shown that these nanoparticles are actively captured by phagocytic cells and that they are not cytotoxic. The polymer nanoparticles loaded with cisplatin at different concentrations from 0.1 to 10 μg/mL yielded dose-dependent decrease in viability of chronic myelogenous leukemia and histiocytic lymphoma cells. The lowest percentage of viable cells was observed for lymphoma cells (22%). Taking into account the fact that our nanoparticles will act mainly on malignant phagocytic cells and do not affect healthy cells, they can thus potentially be used for the therapeutic treatment of tumor cells having phagocytic activity. The effect of nanosilver on cell viability was lower than the one of polymer/cisplatin composite. The data from the cytotoxic studies indicate that nanosilver induces toxicity in cells. However, when the copolymers were conjugated to both nanosilver and cisplatin, such a nanosystem displayed less cytotoxic effect compared to the conjugates of dextran-polyacrylamide and cisplatin.
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Locatelli E, Capone B, Likos CN. Multiblob coarse-graining for mixtures of long polymers and soft colloids. J Chem Phys 2016; 145:174901. [DOI: 10.1063/1.4965957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Emanuele Locatelli
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Barbara Capone
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Christos N. Likos
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
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Johnson KJ, Glynos E, Sakellariou G, Green P. Dynamics of Star-Shaped Polystyrene Molecules: From Arm Retraction to Cooperativity. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00456] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
| | | | - Georgios Sakellariou
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis,
Zografou, 15771 Athens, Greece
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24
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Xu X, Chen J. Effect of functionality on unentangled star polymers at equilibrium and under shear flow. J Chem Phys 2016; 144:244905. [DOI: 10.1063/1.4955098] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Xiaolei Xu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, Changchun 130022, People’s Republic of China
| | - Jizhong Chen
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, Changchun 130022, People’s Republic of China
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Higashihara T, Ito S, Fukuta S, Miyane S, Ochiai Y, Ishizone T, Ueda M, Hirao A. Synthesis and Characterization of Multicomponent ABC- and ABCD-Type Miktoarm Star-Branched Polymers Containing a Poly(3-hexylthiophene) Segment. ACS Macro Lett 2016; 5:631-635. [PMID: 35632385 DOI: 10.1021/acsmacrolett.6b00207] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The new series of ABC-type miktoarm star polymer (ABC star, A = polyisoprene (PI), B = polystyrene (PS), and C = poly(3-hexylthiophene) (P3HT)) and ABCD-type miktoarm star polymer (ABCD star, A = PI, B = PS, C = poly(α-methylstyrene) (PαMS), and D = P3HT) could be synthesized by the combination of the controlled KCTP, anionic linking reaction, and Click chemistry. By the copper(I)-catalyzed Huisgen 1,3-dipolar cycloaddition click reaction of the azido-chain-end-functional P3HT (P3HT-N3) with the alkyne-in-chain-functional AB diblock copolymer (A = PI and B = PS) (AB-alkyne) or alkyne-core-functional ABC miktoarm star polymer (A = PI, B = PS, and C = PαMS) (ABC-alkyne), the target ABC star and ABCD star, respectively, were obtained, as confirmed by size exclusion chromatography (SEC) and proton nuclear magnetic resonance (1H NMR). The thermal and optical properties of these star polymers were examined by thermal gravimetric analysis (TGA) and UV-vis spectroscopy. The dynamic scattering calorimetry (DSC), atomic force micrograph (AFM) image, and grazing incidence small-angle X-ray scattering (GISAXS) results showed that the periodic P3HT fibril nanostructures rather than microphase separation occurred in the ABCD star film. In addition, it was found that highly crystalline P3HT domains aligned in the "edge-on" orientation, as supported by grazing incidence wide-angle X-ray scattering (GIWAXS).
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Affiliation(s)
- Tomoya Higashihara
- Department
of Organic Device Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Shotaro Ito
- Division
of Soft Material Chemistry, Polymeric and Organic Materials Department,
Graduate School of Science and Engineering, Tokyo Institute of Technology, S1-13, 2-12-1, Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Seijiro Fukuta
- Department
of Organic Device Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Satoshi Miyane
- Department
of Organic Device Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Yuto Ochiai
- Department
of Organic Device Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Takashi Ishizone
- Division
of Soft Material Chemistry, Polymeric and Organic Materials Department,
Graduate School of Science and Engineering, Tokyo Institute of Technology, S1-13, 2-12-1, Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Mitsuru Ueda
- Department
of Organic Device Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Akira Hirao
- Division
of Soft Material Chemistry, Polymeric and Organic Materials Department,
Graduate School of Science and Engineering, Tokyo Institute of Technology, S1-13, 2-12-1, Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
- Department
of Chemical Engineering, National Taiwan University, No.1, Sec.
4, Roosevelt Road, Taipei 10617, Taiwan
- Department
of Applied Chemistry, National Chiao Tung University, 1001 University
Road, Hsinchu 30010, Taiwan
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Burns AB, Register RA. Strategies for the Synthesis of Well-Defined Star Polymers by Anionic Polymerization with Chlorosilane Coupling and Preservation of the Star Architecture during Catalytic Hydrogenation. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02764] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Adam B. Burns
- Department of Chemical and
Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Richard A. Register
- Department of Chemical and
Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
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Gupta S, Stellbrink J, Zaccarelli E, Likos CN, Camargo M, Holmqvist P, Allgaier J, Willner L, Richter D. Validity of the Stokes-Einstein Relation in Soft Colloids up to the Glass Transition. PHYSICAL REVIEW LETTERS 2015; 115:128302. [PMID: 26431020 DOI: 10.1103/physrevlett.115.128302] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Indexed: 05/23/2023]
Abstract
We investigate the dynamics of kinetically frozen block copolymer micelles of different softness across a wide range of particle concentrations, from the fluid to the onset of glassy behavior, through a combination of rheology, dynamic light scattering, and pulsed field gradient NMR spectroscopy. We additionally perform Brownian dynamics simulations based on an ultrasoft coarse-grained potential, which are found to be in quantitative agreement with experiments, capturing even the very details of dynamic structure factors S(Q,t) on approaching the glass transition. We provide evidence that for these systems the Stokes-Einstein relation holds up to the glass transition; given that it is violated for dense suspensions of hard colloids, our findings suggest that its validity is an intriguing signature of ultrasoft interactions.
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Affiliation(s)
- Sudipta Gupta
- JCNS-1 and ICS-1, Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany
- JCNS-SNS, Oak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, Tennessee 37831, USA
| | - Jörg Stellbrink
- JCNS-1 and ICS-1, Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany
| | - Emanuela Zaccarelli
- CNR-ISC and Dipartimento di Fisica, Sapienza Università di Roma, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Christos N Likos
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria
| | - Manuel Camargo
- Centro de Investigaciones en Ciencias Básicas y Aplicadas, Universidad Antonio Nariño, Km 18 via Cali-Jamundí, 760030 Santiago de Cali, Colombia
| | - Peter Holmqvist
- Division of Physical Chemistry, Lund University, 22100 Lund, Sweden
| | - Jürgen Allgaier
- JCNS-1 and ICS-1, Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany
| | - Lutz Willner
- JCNS-1 and ICS-1, Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany
| | - Dieter Richter
- JCNS-1 and ICS-1, Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany
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28
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Polgar LM, Lentzakis H, Collias D, Snijkers F, Lee S, Chang T, Sakellariou G, Wever DAZ, Toncelli C, Broekhuis AA, Picchioni F, Gotsis AD, Vlassopoulos D. Synthesis and Linear Viscoelasticity of Polystyrene Stars with a Polyketone Core. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01434] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- L. M. Polgar
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - H. Lentzakis
- Institute
of Electronic Structure and Laser, FORTH, P.O. Box 1527, Heraklion, Crete GR-71110, Greece
- Department
of Materials Science and Technology, University of Crete, P.O. Box 2208, Heraklion,
Crete GR-71003, Greece
| | - D. Collias
- Institute
of Electronic Structure and Laser, FORTH, P.O. Box 1527, Heraklion, Crete GR-71110, Greece
| | - F. Snijkers
- Institute
of Electronic Structure and Laser, FORTH, P.O. Box 1527, Heraklion, Crete GR-71110, Greece
- Department
of Materials Science and Technology, University of Crete, P.O. Box 2208, Heraklion,
Crete GR-71003, Greece
| | - S. Lee
- Division
of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology, Pohang 790784, Korea
| | - T. Chang
- Division
of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology, Pohang 790784, Korea
| | - G. Sakellariou
- Department
of Chemistry, University of Athens, Athens GR-15771, Greece
| | - D. A. Z. Wever
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - C. Toncelli
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - A. A. Broekhuis
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - F. Picchioni
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - A. D. Gotsis
- Department
of Applied Sciences, Technical University of Crete, Chania, Crete GR-73100, Greece
| | - D. Vlassopoulos
- Institute
of Electronic Structure and Laser, FORTH, P.O. Box 1527, Heraklion, Crete GR-71110, Greece
- Department
of Materials Science and Technology, University of Crete, P.O. Box 2208, Heraklion,
Crete GR-71003, Greece
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29
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Chremos A, Glynos E, Green PF. Structure and dynamical intra-molecular heterogeneity of star polymer melts above glass transition temperature. J Chem Phys 2015; 142:044901. [DOI: 10.1063/1.4906085] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Alexandros Chremos
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Emmanouil Glynos
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Peter F. Green
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
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30
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Khabaz F, Khare R. Effect of chain architecture on the size, shape, and intrinsic viscosity of chains in polymer solutions: A molecular simulation study. J Chem Phys 2014; 141:214904. [DOI: 10.1063/1.4902052] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Fardin Khabaz
- Department of Chemical Engineering, Texas Tech University, Box 43121, Lubbock, Texas 79409-3121, USA
| | - Rajesh Khare
- Department of Chemical Engineering, Texas Tech University, Box 43121, Lubbock, Texas 79409-3121, USA
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31
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Randisi F, Pelissetto A. High-functionality star-branched macromolecules: Polymer size and virial coefficients. J Chem Phys 2013; 139:154902. [DOI: 10.1063/1.4824769] [Citation(s) in RCA: 12] [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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32
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Lebedev V, Török G, Vinogradova L. Regular Star-Shaped Fullerene(C60)-Containing Polystyrenes in Solutions: SANS Aspect. J MACROMOL SCI B 2013. [DOI: 10.1080/00222348.2013.808927] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Vasily Lebedev
- a St. Petersburg Nuclear Physics Institute, NRC Kurchatov Institute , Gatchina , Leningrad , Russia
| | - Gyula Török
- b Research Institute for Solid State Physics and Optics, Wignal Research Centre for Physics of HAS , Budapest , Hungary
| | - Lyudmila Vinogradova
- c Institute of Macromolecular Compounds, Russian Academy of Sciences , St. Petersburg , Russia
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33
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Menichetti R, Pelissetto A. Comparing different coarse-grained potentials for star polymers. J Chem Phys 2013; 138:124902. [DOI: 10.1063/1.4796143] [Citation(s) in RCA: 5] [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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34
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Kumar A, Rai GJ, Biswas P. Conformation and intramolecular relaxation dynamics of semiflexible randomly hyperbranched polymers. J Chem Phys 2013; 138:104902. [DOI: 10.1063/1.4794310] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Lebedev VT, Török G, Vinogradova LV. Effect of fullerene C60 branching center on the conformational properties of arms and the structure of star-shaped polystyrenes in solutions. POLYMER SCIENCE SERIES A 2013. [DOI: 10.1134/s0965545x13020053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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Singh SP, Fedosov DA, Chatterji A, Winkler RG, Gompper G. Conformational and dynamical properties of ultra-soft colloids in semi-dilute solutions under shear flow. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:464103. [PMID: 23114112 DOI: 10.1088/0953-8984/24/46/464103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We investigate structural and dynamical properties of ultra-soft colloids in dilute and semi-dilute solutions by hybrid mesoscale simulations under linear shear flow. In particular, the influence of functionality on these properties is addressed. Our study combines molecular dynamics simulations for the solute with the multiparticle collision dynamics approach for the coarse-grained solvent. The star polymers exhibit large conformational and orientational changes in shear flow, which we characterize by the radius of gyration tensor and the alignment angle. These quantities show a universal dependence on a concentration- and functionality-dependent Weissenberg number with slight deviations at high shear rates. Moreover, the star polymers display a rotational dynamics with a shear-rate- and concentration-dependent rotation frequency. We attribute the concentration dependence to the screening of hydrodynamic interactions in semi-dilute star-polymer solutions.
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Affiliation(s)
- Sunil P Singh
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems, Forschungszentrum Jülich, 52425 Jülich, Germany.
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37
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Higashihara T, Hayashi M, Hirao A. Synthesis of well-defined star-branched polymers by stepwise iterative methodology using living anionic polymerization. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2010.08.001] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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38
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Blavatska V, von Ferber C, Holovatch Y. Star copolymers in porous environments: scaling and its manifestations. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 83:011803. [PMID: 21405706 DOI: 10.1103/physreve.83.011803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Indexed: 05/30/2023]
Abstract
We consider star polymers, consisting of two different polymer species, in a solvent subject to quenched correlated structural obstacles. We assume that the disorder is correlated with a power-law decay of the pair-correlation function g(x)~x(-a). Applying the field-theoretical renormalization group approach in d dimensions, we analyze different scenarios of scaling behavior working to first order of a double ɛ=4-d, δ=4-a expansion. We discuss the influence of the correlated disorder on the resulting scaling laws and possible manifestations such as diffusion-controlled reactions in the vicinity of absorbing traps placed on polymers as well as the effective short-distance interaction between star copolymers.
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Affiliation(s)
- V Blavatska
- Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, Lviv, Ukraine.
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39
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Tückmantel T, Lo Verso F, N. Likos C. Ground states of ultrasoft particles with attractions: a genetic algorithm approach. Mol Phys 2010. [DOI: 10.1080/00268970902873562] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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40
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Wilk A, Huissmann S, Stiakakis E, Kohlbrecher J, Vlassopoulos D, Likos CN, Meier G, Dhont JKG, Petekidis G, Vavrin R. Osmotic shrinkage in star/linear polymer mixtures. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2010; 32:127-34. [PMID: 20596881 DOI: 10.1140/epje/i2010-10607-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Accepted: 05/26/2010] [Indexed: 05/23/2023]
Abstract
Multiarm star polymers were used as model grafted colloidal particles with long hairs, to study their size variation due to osmotic forces arising from added linear homopolymers of smaller size. This is the origin of the depletion phenomenon that has been exploited in the past as a means to melt soft colloidal glasses by adding linear chains and analyzed using dynamic light scattering experiments and an effective interactions analysis yielding the depletion potential. Shrinkage is a generic phenomenon for hairy particles, which affects macroscopic properties and state transitions at high concentrations. In this work we present a small-angle neutron scattering study of star/linear polymer mixtures with different size ratios (varying the linear polymer molar mass) and confirm the depletion picture, i.e., osmotic star shrinkage. Moreover, we find that as the linear/star polymer size ratio increases for the same effective linear volume fraction (c/c* with c* the overlapping concentration), the star shrinkage is reduced whereas the onset of shrinkage appears to take place at higher linear polymer volume fractions. A theoretical description of the force balance on a star polymer in solution, accounting for the classic Flory contributions, i.e. elastic and excluded volume, as well as the osmotic force due to the linear chains, accurately predicts the experimental findings of reduced star size as a function of linear polymer concentration. This is done in a parameter-free fashion, in which the size of the cavity created by the star, and from which the chains are excluded, is related to the radius of the former from first principles.
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Affiliation(s)
- A Wilk
- Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut, Villigen PSI, Switzerland
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42
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Stiakakis E, Wilk A, Kohlbrecher J, Vlassopoulos D, Petekidis G. Slow dynamics, aging, and crystallization of multiarm star glasses. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:020402. [PMID: 20365516 DOI: 10.1103/physreve.81.020402] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2009] [Revised: 10/16/2009] [Indexed: 05/29/2023]
Abstract
Multiarm star polymers are model systems with tunable intermediate colloid to polymerlike character, exhibiting rich phase behavior, internal relaxations, and flow properties. An important puzzle for several years has been the lack of clear experimental proof of crystalline states despite strong theoretical predictions. We present unambiguous evidence via multispeckle dynamic light scattering (MSDLS) and small-angle neutron scattering (SANS) for such crystallization in a solvent of intermediate quality. An unexpected speed up of the short-time star diffusion observed in MSDLS was attributed by SANS to crystallization, via aging, of the multiam star glass. This delayed glass to crystal transition establishes a pathway for star crystallization that might be generic in colloidal glasses.
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Affiliation(s)
- E Stiakakis
- Foundation for Research & Technology-Hellas, IESL, Heraklion, Greece
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43
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Mendrek B, Trzebicka B. Synthesis and characterization of well-defined poly(tert-butyl acrylate) star polymers. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2009.04.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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44
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Kandar AK, Srivastava S, Basu JK, Mukhopadhyay MK, Seifert S, Narayanan S. Unusual dynamical arrest in polymer grafted nanoparticles. J Chem Phys 2009; 130:121102. [DOI: 10.1063/1.3090484] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Kowalczuk A, Vandendriessche A, Trzebicka B, Mendrek B, Szeluga U, Cholewiński G, Smet M, Dworak A, Dehaen W. Core‐shell nanoparticles with hyperbranched poly(arylene‐oxindole) interiors. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23224] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Agnieszka Kowalczuk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie‐Sklodowskiej 34, 41‐819 Zabrze, Poland
| | - Annelies Vandendriessche
- Department of Chemistry, University of Leuven, Celestijnenlaan, 200F, B‐3001 Leuven (Heverlee), Belgium
| | - Barbara Trzebicka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie‐Sklodowskiej 34, 41‐819 Zabrze, Poland
| | - Barbara Mendrek
- Institute of Chemistry, University of Opole, 45‐052 Opole, Poland
| | - Urszula Szeluga
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie‐Sklodowskiej 34, 41‐819 Zabrze, Poland
| | - Grzegorz Cholewiński
- Department of Organic Chemistry, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12, 80‐952 Gdansk, Poland
| | - Mario Smet
- Department of Chemistry, University of Leuven, Celestijnenlaan, 200F, B‐3001 Leuven (Heverlee), Belgium
| | - Andrzej Dworak
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie‐Sklodowskiej 34, 41‐819 Zabrze, Poland
- Institute of Chemistry, University of Opole, 45‐052 Opole, Poland
| | - Wim Dehaen
- Department of Chemistry, University of Leuven, Celestijnenlaan, 200F, B‐3001 Leuven (Heverlee), Belgium
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Debnath A, Sebastian KL. Barrier crossing by a star polymer. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:051803. [PMID: 18233677 DOI: 10.1103/physreve.76.051803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2007] [Indexed: 05/25/2023]
Abstract
We analyze the dynamics of a star polymer of F arms trapped in a double well potential. Initially the molecule is confined to one of the minima and can cross over the barrier to the other side. We use the continuum version of the Rouse-Ham model and calculate the rate of crossing using the multidimensional approach due to Langer [Ann. Phys. (N.Y.) 54, 258 (1969)]. Finding the transition state for the process is shown to be equivalent to the solution of Newton's equations for F independent particles, moving in an inverted potential. For each star polymer, there is a critical barrier top curvature, below which the star crosses over in coiled conformation. The value of the critical curvature is determined by the first Rouse mode of the star. If the curvature is greater than this critical value, the saddle point for the crossing is a stretched conformation of the star. For the coiled transition state, the activation energy is proportional to the total arm length of the star. For the stretched transition state, as one increases the length of an arm of the star, the activation energy at first increases and then decreases. This results from the fact that in the stretched state, only one arm of the polymer is stretched across the top of the barrier, while others need not be. We calculate the rate by expanding the energy around the saddle up to second order in the fluctuations. As we use the continuum model, there are infinite modes for the polymer and, consequently, the prefactor has infinite products. We show that these infinite products can be reduced to a simple expression, and evaluated easily. However, the rate diverges near NTc due to the multifurcation, which results in more than one unstable mode. The cure for this divergence is to keep terms up to fourth order in the expansion of energy for these modes. Performing this, we have calculated the rate as a function of the length of the star. It is found that the rate has a nonmonotonic dependence on the length, suggesting that longer stars may actually cross over the barrier faster.
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Affiliation(s)
- Ananya Debnath
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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Fröhlich MG, Vana P, Zifferer G. Shielding effects in polymer-polymer reactions. II. Reactions between linear and star-branched chains with up to six arms. J Chem Phys 2007; 127:164906. [DOI: 10.1063/1.2780167] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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48
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Zhao L, Li YG, Zhong C. Integral equation theory study on the phase separation in star polymer nanocomposite melts. J Chem Phys 2007; 127:154909. [DOI: 10.1063/1.2795717] [Citation(s) in RCA: 14] [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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49
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Laurati M, Stellbrink J, Lund R, Willner L, Zaccarelli E, Richter D. Asymmetric poly(ethylene-alt-propylene)-poly(ethylene oxide) micelles: a system with starlike morphology and interactions. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:041503. [PMID: 17994990 DOI: 10.1103/physreve.76.041503] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2007] [Indexed: 05/25/2023]
Abstract
We report on an experimental study of single particle properties and interactions of poly(ethylene-alt-propylene)-poly(ethylene oxide) (PEP-PEO) starlike micelles. The starlike regime is achieved by an extremely asymmetric block ratio (1:20) and the number of arms (functionality) is changed by varying the composition of the solvent (the interfacial tension). Small angle neutron scattering (SANS) data in the dilute regime can be modeled by assuming a constant density profile in the micellar core (compact core) and a starlike density profile in the corona (starlike shell). The starlike morphology of the corona is confirmed by a direct comparison with SANS measurements of dilute poly butadiene star solutions. Comparison of structure factors obtained by SANS measurements in the concentrated regime shows in addition that the interactions in the two systems are equivalent. Micellar structure factors at several packing fractions can be modeled by using the ultrasoft potential recently proposed for star polymers [Likos, Phys. Rev. Lett. 80, 4450 (1998)]. The experimental phase diagram of PEP-PEO micelles is quantitatively compared to theoretical expectations, finding good agreement for the location of the liquid-solid boundary and excellent agreement for the critical packing fraction where the liquid-to-bcc crystal transition takes place for f<70. The functionality, i.e., the coronal density, strongly influences the nature of the solid phase: for f<70 the system crystallizes into a bcc phase, high f>70 formation of amorphous arrested states prevents crystallization.
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Affiliation(s)
- M Laurati
- Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany.
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50
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Ripoll M, Winkler RG, Gompper G. Hydrodynamic screening of star polymers in shear flow. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2007; 23:349-54. [PMID: 17712520 DOI: 10.1140/epje/i2006-10220-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2006] [Accepted: 06/20/2007] [Indexed: 05/16/2023]
Abstract
The mutual effects of the conformations of a star polymer in simple shear flow and the deformation of the solvent flow field are investigated by a hybrid mesoscale simulation technique. We characterize the flow field near the star polymer as a function of its functionality (arm number) f . A strong screening of the imposed flow is found inside the star polymer, which increases with increasing f . To elucidate the importance of hydrodynamic screening, we compare results for hydrodynamic and random solvents. The dependence of the polymer orientation angle on the Weissenberg number shows a power law behavior with super-universal exponent --independent of hydrodynamic and excluded-volume interactions. In contrast, the polymer rotation frequency changes qualitatively when hydrodynamic interactions are switched on.
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Affiliation(s)
- M Ripoll
- Institut für Festkörperforschung, Forschungszentrum Jülich, 52425, Jülich, Germany.
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