1
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Wang Y, Patil S, Cheng S, Do C. The influence of elongation-induced concentration fluctuations on segmental friction in polymer blends. SOFT MATTER 2024; 20:4257-4269. [PMID: 38757213 DOI: 10.1039/d4sm00219a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Recent experimental studies have revealed a lack of universality in the extensional behavior of linear polymers, which is not envisioned by classical molecular theories. These surprising findings, particularly the sharp contrast between polymer melts and solutions, have catalyzed the development of new theoretical ideas, including the concept of friction reduction in highly stretched polymer melts. By presenting evidence from rheology and small-angle neutron scattering, this work shows that deformation-induced demixing, which is due to the viscoelastic asymmetry in binary mixtures, contributes to the observed nonuniversality. In the case of polystyrene/oligostyrene blends, demixing increases the effective glass transition temperature of the long chain, leading to an apparent friction enhancement. On the other hand, the opposite case is found for the polystyrene/poly(α-methylstyrene) blend. These results highlight the important influence of deformation-induced concentration fluctuations on polymer segmental friction.
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Affiliation(s)
- Yangyang Wang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
| | - Shalin Patil
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
| | - Shiwang Cheng
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
| | - Changwoo Do
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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2
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Shaheen S, Khalid S, Siqqique R, Abbas M, Ifikhar T, Ijaz I, Sarwar S, Razak SA, Riaz MH, Aljowaie RM, Elshikh MS, Kamal A. Comparative taxonomical, biological and pharmacological potential of healthy and geminivirus infected leaves of Hibiscus rosa-sinensis L.: First report. Microb Pathog 2023; 185:106428. [PMID: 37977480 DOI: 10.1016/j.micpath.2023.106428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/21/2023] [Accepted: 10/27/2023] [Indexed: 11/19/2023]
Abstract
In the present research project, the first report on comparative analysis of the taxonomical, biological and pharmacological potential of healthy and geminivirus infected Hibiscus rosa sinensis (L.) leaves of the family Malvaceae was done by using different micro and macroscopic techniques. First of all, leaves were characterized for Cotton leaf curl Multan virus (CLCuMuV) and its associated betasatellite (Cotton leaf curl Multan Betasatellite; CLCuMB). Different morphological parameters like shape and size of stem, leaves, seeds and roots, presence and absence of ligule, distance between nodes and internodes and type of inflorescence etc. were analyzed. CLCuMuV infected H. rosa-sinensis revealed systematic symptoms of infection like chlorosis of leaves, stunted growth, decrease in size of roots, shoots and distortion etc. Anatomical investigation was performed under light ad scanning electron microscope. Different anatomical features like length and shape of guard cells, subsidiary cells, presence or absence of stomata, secretory ducts and trichomes were examined. In both plant samples anomocytic types of stomata and elongated, non-glandular and pointed tip trichomes were present, but the size (especially length and width) of trichomes and other cells like epidermal, subsidiary, and guard cells were highest in virus infected plants likened to healthy one. In the antibacterial activity, the maximum antibacterial potentail was seen in methanolic extract of K. pneumonea while antifungal activity was shown by methanolic extract of A. solani. Plants interact with different biological entities according to environmental conditions continuously and evolved. These types of interactions induce changes positively and negatively on plant metabolism and metabolites production. Many plant viruses also attacked various host plants consequently alter their secondary metabolism. To overcome such virus infected plants produces many important and different types of secondary plant metabolites as a defense response. Subsequent analysis of this n-hexane plant extract using Gas chromatography mass spectroscopy technique revealed that Hibiscus eluted contained 10 main compounds in Healthy sample and 13 compounds in infected one. Presence of essential secondary metabolites were also analyzed by FTIR analysis. The present study provides a comprehensive and novel review on taxonomy (morphology, anatomy) and antimicrobial potential of both healthy and geminivirus infected H. rosa-sinensis.
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Affiliation(s)
| | - Sana Khalid
- Lahore College for Women University, Lahore, Pakistan.
| | | | - Muneeza Abbas
- Lahore College for Women University, Lahore, Pakistan.
| | | | - Iram Ijaz
- University of Florid Gainesville, FL, USA.
| | - Sobia Sarwar
- Lahore College for Women University, Lahore, Pakistan.
| | - Sarah Abdul Razak
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lampur, Malaysia.
| | | | - Reem M Aljowaie
- Department of Botany and Microbiology, College of Science, King Saud University, P.O.2455, Riyadh, 11451, Saudi Arabia.
| | - Mohamed S Elshikh
- Department of Botany and Microbiology, College of Science, King Saud University, P.O.2455, Riyadh, 11451, Saudi Arabia.
| | - Asif Kamal
- Islamabad Career College, Kiayani Road, Bharakhu, Islamabad, Pakistan.
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3
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Sun R, Yang J, Patil S, Liu Y, Zuo X, Lee A, Yang W, Wang Y, Cheng S. Relaxation dynamics of deformed polymer nanocomposites as revealed by small-angle scattering and rheology. SOFT MATTER 2022; 18:8867-8884. [PMID: 36377377 DOI: 10.1039/d2sm00775d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The relaxation dynamics of polystyrene (PS)/silica nanocomposites after a large step deformation are studied by a combination of small-angle scattering techniques and rheology. Small-angle X-ray scattering measurements and rheology show clear signatures of nanoparticle aggregation that enhances the mechanical properties of the polymer nanocomposites (PNCs) in the linear viscoelastic regime and during the initial phase of stress relaxation along with accelerated relaxation dynamics. Small-angle neutron scattering experiments under the zero-average-contrast condition reveal, however, smaller structural anisotropy in the PNCs than that in the neat polymer matrix, as well as accelerated anisotropy relaxation. In addition, the degrees of anisotropy reduction and relaxation dynamics acceleration increase with increasing nanoparticle loading. These results are in sharp contrast to the prevailing viewpoint of enhanced molecular deformation as the main mechanism for the mechanical enhancement in PNCs. Furthermore, the observed acceleration of stress relaxation and reduction in structural anisotropy point to two types of nonlinear effects in the relaxation dynamics of PNCs at large deformation.
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Affiliation(s)
- Ruikun Sun
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
| | - Jie Yang
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Shalin Patil
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
| | - Yun Liu
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA
| | - Xiaobing Zuo
- X-ray Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Andre Lee
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
| | - Wei Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Yangyang Wang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
| | - Shiwang Cheng
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
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4
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Conformation and structure of ring polymers in semidilute solutions: A molecular dynamics simulation study. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Outerelo Corvo T, Jourdain A, O’Brien S, Restagno F, Drockenmuller E, Chennevière A. Multiscale Structure of Poly(ionic liquid)s in Bulk and Solutions by Small-Angle Neutron Scattering. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tiago Outerelo Corvo
- Université Paris Saclay, Laboratoire Léon Brillouin, UMR 12 CNRS-CEA, CEA-Saclay, Gif-sur-Yvette 91191, France
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay 91405, France
| | - Antoine Jourdain
- Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, Lyon F-69003, France
| | - Shona O’Brien
- Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, Lyon F-69003, France
| | - Frédéric Restagno
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay 91405, France
| | - Eric Drockenmuller
- Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, Lyon F-69003, France
| | - Alexis Chennevière
- Université Paris Saclay, Laboratoire Léon Brillouin, UMR 12 CNRS-CEA, CEA-Saclay, Gif-sur-Yvette 91191, France
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6
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Cho SH, Pelczer I, Register RA. Regularity of Deuteration in Linear Polyethylene Prepared by Saturation of Polycyclopentene over Homogeneous Catalysts. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seong Hyuk Cho
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - István Pelczer
- Department of Chemistry, 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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7
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Saito M, Ito K, Yokoyama H. Mechanical Properties of Ultrathin Polystyrene- b-Polybutadiene- b-Polystyrene Block Copolymer Films: Film Thickness-Dependent Young’s Modulus. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masayuki Saito
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Kohzo Ito
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Hideaki Yokoyama
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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8
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The Relationship between Free Volume and Cooperative Rearrangement: From the Temperature-Dependent Neutron Total Scattering Experiment of Polystyrene. Polymers (Basel) 2021; 13:polym13183042. [PMID: 34577943 PMCID: PMC8470135 DOI: 10.3390/polym13183042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/05/2021] [Accepted: 09/06/2021] [Indexed: 11/17/2022] Open
Abstract
Although many theories have been proposed to describe the nature of glass formation, its microscopic picture is still missing. Here, by a combination of neutron scattering and molecular dynamics simulation, we present the temperature-dependent atomic structure variation of polystyrene at the glass formation, free volume and cooperative rearrangement. When it is close to glass formation, the polymer is confined in tubes, whose diameter is the main chain–main chain distance, in a “static cage” from its neighbors. This definition can not only account for the kinetic pathway dependence of Williams-Landel-Ferry (WLF) free volume, but also be testified in a set of six polymers. However, the free volume which allows a monomer to move cannot be found in any frame of its real-space image. Monomers, thus, have to move cooperatively to be out of the cage. During glass formation, dynamic heterogeneity develops, and string-like cooperative rearrangement region (CRR) grows over a long range of time and length scales. All of these CRRs tend to walk through loose “static cages”. Our observation unifies the concepts of free volume and cooperative rearrangement. The former is a statistical average leading to a polydisperse “static cage” formation; while a loose “static cage” provides the way that CRRs move.
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9
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Genix AC, Bocharova V, Carroll B, Dieudonné-George P, Sztucki M, Schweins R, Sokolov AP, Oberdisse J. Direct Structural Evidence for Interfacial Gradients in Asymmetric Polymer Nanocomposite Blends. ACS APPLIED MATERIALS & INTERFACES 2021; 13:36262-36274. [PMID: 34291639 DOI: 10.1021/acsami.1c06971] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Understanding the complex structure of polymer blends filled with nanoparticles (NPs) is key to design their macroscopic properties. Here, the spatial distribution of hydrogenated (H) and deuterated (D) polymer chains asymmetric in mass is studied by small-angle neutron scattering. Depending on the chain mass, a qualitatively new large-scale organization of poly(vinyl acetate) chains beyond the random-phase approximation is evidenced in nanocomposites with attractive polymer-silica interactions. The silica is found to systematically induce bulk segregation. Only with long H-chains, a strong scattering signature is observed in the q range of the NP size: it is the sign of interfacial isotopic enrichment, that is, of contrasted polymer shells close to the NP surface. A quantitative model describing both the bulk segregation and the interfacial gradient (over ca. 10-20 nm depending on the NP size) is developed, showing that both are of comparable strength. In all cases, NP surfaces trap the polymer blend in a non-equilibrium state, with preferential adsorption around NPs only if the chain length and isotopic preference toward the surface combine their entropic and enthalpic driving forces. This structural evidence for interfacial polymer gradients will open the road for quantitative understanding of the dynamics of many-chain nanocomposite systems.
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Affiliation(s)
- Anne-Caroline Genix
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, F-34095 Montpellier, France
| | - Vera Bocharova
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Bobby Carroll
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | | | - Michael Sztucki
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, F-38043 Grenoble Cedex 9, France
| | - Ralf Schweins
- Institut Laue-Langevin, DS/LSS, 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Alexei P Sokolov
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Julian Oberdisse
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, F-34095 Montpellier, France
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10
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11
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Pavlov GM, Gosteva AA, Dommes OA, Okatova OV, Gavrilova II, Panarin EF. Detecting Hydrophobic Interactions in Star-Shaped Amphiphilic Copolymers by the Viscometric Method. POLYMER SCIENCE SERIES A 2021. [DOI: 10.1134/s0965545x21010077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Pavlov GM, Gosteva AA, Okatova OV, Dommes OA, Gavrilova II, Panarin EF. Detection and evaluation of polymer–polymer interactions in dilute solutions of associating polymers. Polym Chem 2021. [DOI: 10.1039/d0py01725f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An experimental tool for the evaluation of intramolecular associative/hydrophobic interactions in polymer/solvent systems was proposed and tested.
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Affiliation(s)
| | - Anna A. Gosteva
- Institute of Macromolecular Compounds
- St. Petersburg 199004
- Russia
| | - Olga V. Okatova
- Institute of Macromolecular Compounds
- St. Petersburg 199004
- Russia
| | - Olga A. Dommes
- Institute of Macromolecular Compounds
- St. Petersburg 199004
- Russia
| | | | - Evgenii F. Panarin
- Institute of Macromolecular Compounds
- St. Petersburg 199004
- Russia
- Department of Medical Physics and Bioengineering
- St. Petersburg State Polytechnical University
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13
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Wang Y, Wang W, Hong K, Do C, Chen WR. Quantitative examination of a fundamental assumption in small-angle neutron scattering studies of deformed polymer melts. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122698] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Jiao G, Zuo T, Ma C, Han Z, Zhang J, Chen Y, Zhao J, Cheng H, Han CC. 3d Most-Probable All-Atom Structure of Atactic Polystyrene During Glass Formation: A Neutron Total Scattering Study. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00788] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guisheng Jiao
- China Spallation Neutron Source (CSNS), Institute of High Energy Physics (IHEP), Chinese Academy of Science(CAS), Dongguan 523803, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Taisen Zuo
- China Spallation Neutron Source (CSNS), Institute of High Energy Physics (IHEP), Chinese Academy of Science(CAS), Dongguan 523803, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Changli Ma
- China Spallation Neutron Source (CSNS), Institute of High Energy Physics (IHEP), Chinese Academy of Science(CAS), Dongguan 523803, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Zehua Han
- China Spallation Neutron Source (CSNS), Institute of High Energy Physics (IHEP), Chinese Academy of Science(CAS), Dongguan 523803, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junrong Zhang
- China Spallation Neutron Source (CSNS), Institute of High Energy Physics (IHEP), Chinese Academy of Science(CAS), Dongguan 523803, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Ye Chen
- Faculty of Material Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - Junpeng Zhao
- Faculty of Material Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - He Cheng
- China Spallation Neutron Source (CSNS), Institute of High Energy Physics (IHEP), Chinese Academy of Science(CAS), Dongguan 523803, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Charles C. Han
- Institute for Advanced Study, Shenzhen University, Shenzhen 508060, China
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15
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Ricci E, Vergadou N, Vogiatzis GG, De Angelis MG, Theodorou DN. Molecular Simulations and Mechanistic Analysis of the Effect of CO 2 Sorption on Thermodynamics, Structure, and Local Dynamics of Molten Atactic Polystyrene. Macromolecules 2020; 53:3669-3689. [PMID: 33828339 PMCID: PMC8016389 DOI: 10.1021/acs.macromol.0c00323] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 04/21/2020] [Indexed: 11/30/2022]
Abstract
A simulation strategy encompassing different scales was applied to the systematic study of the effects of CO2 uptake on the properties of atactic polystyrene (aPS) melts. The analysis accounted for the influence of temperature between 450 and 550 K, polymer molecular weights (M w) between 2100 and 31000 g/mol, and CO2 pressures up to 20 MPa on the volumetric, swelling, structural, and dynamic properties of the polymer as well as on the CO2 solubility and diffusivity by performing molecular dynamics (MD) simulations of the system in a fully atomistic representation. A hierarchical scheme was used for the generation of the higher M w polymer systems, which consisted of equilibration at a coarse-grained level of representation through efficient connectivity-altering Monte Carlo simulations, and reverse-mapping back to the atomistic representation, obtaining the configurations used for subsequent MD simulations. Sorption isotherms and associated swelling effects were determined by using an iterative procedure that incorporated a series of MD simulations in the NPT ensemble and the Widom test particle insertion method, while CO2 diffusion coefficients were extracted from long MD runs in the NVE ensemble. Solubility and diffusivity compared favorably with experimental results and with predictions of the Sanchez-Lacombe equation of state, which was reparametrized to capture the M w dependence of polymer properties with greater accuracy. Structural features of the polymer matrix were correctly reproduced by the simulations, and the effects of gas concentration and M w on structure and local dynamics were thoroughly investigated. In the presence of CO2, a significant acceleration of the segmental dynamics of the polymer occurred, more pronouncedly at low M w. The speed-up effect caused by the swelling agent was not limited to the chain ends but affected the whole chain in a similar fashion.
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Affiliation(s)
- Eleonora Ricci
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Niki Vergadou
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Athens, Greece
| | - Georgios G Vogiatzis
- Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Maria Grazia De Angelis
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Doros N Theodorou
- School of Chemical Engineering, National Technical University of Athens, Athens, Greece
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16
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Ohira M, Tsuji Y, Watanabe N, Morishima K, Gilbert EP, Li X, Shibayama M. Quantitative Structure Analysis of a Near-Ideal Polymer Network with Deuterium Label by Small-Angle Neutron Scattering. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02695] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Masashi Ohira
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Yui Tsuji
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Nobuyuki Watanabe
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Ken Morishima
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2, Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - Elliot P. Gilbert
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
| | - Xiang Li
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Mitsuhiro Shibayama
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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17
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Sharma H, Dormidontova EE. Polymer-Threaded and Polymer-Wrapped Wormlike Micelle Solutions: Molecular Dynamics Simulations. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00974] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Hari Sharma
- Polymer Program, Institute of Materials Science and Physics Department, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Elena E. Dormidontova
- Polymer Program, Institute of Materials Science and Physics Department, University of Connecticut, Storrs, Connecticut 06269, United States
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18
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Alexiadis O, Cheimarios N, Peristeras LD, Bick A, Mavrantzas VG, Theodorou DN, Hill J, Krokidis X. Chameleon: A generalized, connectivity altering software for tackling properties of realistic polymer systems. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2019. [DOI: 10.1002/wcms.1414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | | | - Loukas D. Peristeras
- Institute of Nanoscience and Nanotechnology, Molecular Thermodynamics and Modelling of Materials Laboratory, National Center for Scientific Research “Demokritos” Aghia Paraskevi Greece
| | | | - Vlasis G. Mavrantzas
- Department of Chemical Engineering University of Patras and FORTH/ICE‐HT Patras Greece
| | - Doros N. Theodorou
- School of Chemical Engineering National Technical University of Athens Athens Greece
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19
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Abstract
Specular neutron reflectivity is a technique enabling the measurement of coherent neutron scattering length density profile perpendicular to the plane of a surface or interface, and thereby the profile of chemical composition. The characteristic sizes that are probed range from around 5Å up 5000 Å. It is a scattering technique that averages information over the entire surface and it is therefore not possible to obtain information on correlations in the plane of the interface. The specific properties of neutrons (possibility of tuning the contrast by isotopic substitution, negligible absorption, low energy of the incident neutrons) makes it particularly interesting in the fields of soft matter and biophysics. This course is composed of three parts describing respectively its principle, the experimental aspects (diffractometers, samples), and some scientific examples of neutron reflectometry focusing on the use of contrast variation to probe polymeric systems.
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20
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Iwamoto T, Doi Y, Kinoshita K, Takano A, Takahashi Y, Kim E, Kim TH, Takata SI, Nagao M, Matsushita Y. Conformations of Ring Polystyrenes in Semidilute Solutions and in Linear Polymer Matrices Studied by SANS. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00934] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Takuro Iwamoto
- Department of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yuya Doi
- Department of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Keita Kinoshita
- Department of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Atsushi Takano
- Department of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yoshiaki Takahashi
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Eunhye Kim
- HANARO Research Reactor Utilization Development, Korea Atomic Energy Research Institute (KAERI), Daejeon 305-353, Korea
| | - Tae-Hwan Kim
- HANARO Research Reactor Utilization Development, Korea Atomic Energy Research Institute (KAERI), Daejeon 305-353, Korea
| | - Shin-ichi Takata
- J-PARC Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Michihiro Nagao
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United States
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47408, United States
| | - Yushu Matsushita
- Department of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
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21
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Peterson GI, Bang KT, Choi TL. Mechanochemical Degradation of Denpols: Synthesis and Ultrasound-Induced Chain Scission of Polyphenylene-Based Dendronized Polymers. J Am Chem Soc 2018; 140:8599-8608. [DOI: 10.1021/jacs.8b05110] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregory I. Peterson
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki-Taek Bang
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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22
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Iwamoto T, Doi Y, Kinoshita K, Ohta Y, Takano A, Takahashi Y, Nagao M, Matsushita Y. Conformations of Ring Polystyrenes in Bulk Studied by SANS. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02358] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Takuro Iwamoto
- Department
of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yuya Doi
- Department
of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Keita Kinoshita
- Department
of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yutaka Ohta
- Department
of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Atsushi Takano
- Department
of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yoshiaki Takahashi
- Institute
for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Michihiro Nagao
- NIST
Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United States
- Center
for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47408, United States
| | - Yushu Matsushita
- Department
of Molecular and Macromolecular Chemistry, Nagoya University, Nagoya, Aichi 464-8603, Japan
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23
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Sazer S, Schiessel H. The biology and polymer physics underlying large-scale chromosome organization. Traffic 2018; 19:87-104. [PMID: 29105235 PMCID: PMC5846894 DOI: 10.1111/tra.12539] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 12/21/2022]
Abstract
Chromosome large-scale organization is a beautiful example of the interplay between physics and biology. DNA molecules are polymers and thus belong to the class of molecules for which physicists have developed models and formulated testable hypotheses to understand their arrangement and dynamic properties in solution, based on the principles of polymer physics. Biologists documented and discovered the biochemical basis for the structure, function and dynamic spatial organization of chromosomes in cells. The underlying principles of chromosome organization have recently been revealed in unprecedented detail using high-resolution chromosome capture technology that can simultaneously detect chromosome contact sites throughout the genome. These independent lines of investigation have now converged on a model in which DNA loops, generated by the loop extrusion mechanism, are the basic organizational and functional units of the chromosome.
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Affiliation(s)
- Shelley Sazer
- Verna and Marrs McLean Department of Biochemistry and Molecular BiologyBaylor College of MedicineHoustonTexas
| | - Helmut Schiessel
- Institute Lorentz for Theoretical PhysicsLeiden UniversityLeidenThe Netherlands
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24
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Ederth T. Neutrons for scattering: What they are, where to get them, and how to deal with them. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201818801002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In neutron scattering studies of soft matter, a diverse array of methods and instruments are used, providing information on structure and dynamics on various length and energy scales. However, much of the infrastructure needed for neutron scattering is common for many instruments. After a brief historical retrospect of neutron scattering, this chapter introduces the basic infrastructure needed to conduct scattering experiments. This includes equipment that is used to produce, spectrally adjust and purify, and to deliver neutrons to the instruments where scattering experiments are conducted. The basics of the interaction of neutrons with matter is also introduced, as a preparation for the final sections on the different means at hand for neutron detection.
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25
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Oberdisse J. Introduction to soft matter and neutron scattering. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201818801001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
As an opening lecture to the French-Swedish neutron scattering school held in Uppsala (6th to 9th of December 2016), the basic concepts of both soft matter science and neutron scattering are introduced. Typical soft matter systems like self-assembled surfactants in water, microemulsions, (co-)polymers, and colloids are presented. It will be shown that widely different systems have a common underlying physics dominated by the thermal energy, with astonishing consequences on their statistical thermodynamics, and ultimately rheological properties – namely softness. In the second part, the fundamentals of neutron scattering techniques and in particular small-angle neutron scattering as a powerful method to characterize soft matter systems will be outlined.
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26
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Zeng Y, López-Barrón CR, Kang S, Eberle APR, Lodge TP, Bates FS. Effect of Branching and Molecular Weight on Heterogeneous Catalytic Deuterium Exchange in Polyolefins. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01268] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
| | | | - Shuhui Kang
- ExxonMobil
Chemical
Company, Baytown, Texas 77520, United States
| | - Aaron P. R. Eberle
- ExxonMobil
Research
and Engineering Company, Annandale, New Jersey 08801, United States
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27
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Jiménez-Serratos G, Herdes C, Haslam AJ, Jackson G, Müller EA. Group Contribution Coarse-Grained Molecular Simulations of Polystyrene Melts and Polystyrene Solutions in Alkanes Using the SAFT-γ Force Field. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02072] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Carmelo Herdes
- Department
of Chemical Engineering, University of Bath, Bath BA2 7AY, U.K
| | - Andrew J. Haslam
- Department
of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - George Jackson
- Department
of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Erich A. Müller
- Department
of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
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28
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Jia XM, Shi R, Jiao GS, Chen T, Qian HJ, Lu ZY. Temperature Effect on Interfacial Structure and Dynamics Properties in Polymer/Single-Chain Nanoparticle Composite. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiang-Meng Jia
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Rui Shi
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Gui-Sheng Jiao
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Tao Chen
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Hu-Jun Qian
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Zhong-Yuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
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29
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Vogiatzis GG, Theodorou DN. Multiscale Molecular Simulations of Polymer-Matrix Nanocomposites: or What Molecular Simulations Have Taught us About the Fascinating Nanoworld. ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING : STATE OF THE ART REVIEWS 2017; 25:591-645. [PMID: 29962833 PMCID: PMC6003436 DOI: 10.1007/s11831-016-9207-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 12/20/2016] [Indexed: 06/08/2023]
Abstract
Following the substantial progress in molecular simulations of polymer-matrix nanocomposites, now is the time to reconsider this topic from a critical point of view. A comprehensive survey is reported herein providing an overview of classical molecular simulations, reviewing their major achievements in modeling polymer matrix nanocomposites, and identifying several open challenges. Molecular simulations at multiple length and time scales, working hand-in-hand with sensitive experiments, have enhanced our understanding of how nanofillers alter the structure, dynamics, thermodynamics, rheology and mechanical properties of the surrounding polymer matrices.
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Affiliation(s)
- Georgios G. Vogiatzis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, 15780 Athens, Greece
- Present Address: Department of Mechanical Engineering, Eindhoven University of Technology, PO Box 513, 5600MB Eindhoven, The Netherlands
| | - Doros N. Theodorou
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, 15780 Athens, Greece
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30
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Hénot M, Chennevière A, Drockenmuller E, Shull K, Léger L, Restagno F. Influence of grafting on the glass transition temperature of PS thin films. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2017; 40:11. [PMID: 28124207 DOI: 10.1140/epje/i2017-11500-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/09/2017] [Indexed: 06/06/2023]
Abstract
We present an investigation of the effect of the interaction between a thin polystyrene film and its supporting substrate on its glass transition temperature ([Formula: see text]). We modulate this interaction by depositing the film on end-tethered polystyrene grafted layers of controlled molecular parameters. By comparing [Formula: see text] measurements versus film thickness for films deposited on different grafted layers and films deposited directly on a silicon substrate, we can conclude that there is no important effect of the film-subtrate interaction. Our interpretation of these results is that local orientation and dynamic effects substantial enough to influence [Formula: see text] cannot readily be obtained by grafting prepolymerized chains to a surface, due to intrinsic limitation of the surface grafting density.
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Affiliation(s)
- Marceau Hénot
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay Cedex, France
| | - Alexis Chennevière
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay Cedex, France
| | - Eric Drockenmuller
- Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, F-69003, Lyon, France
| | - Kenneth Shull
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, 60208, Evanston, Illinois, USA
| | - Liliane Léger
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay Cedex, France
| | - Frédéric Restagno
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay Cedex, France
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31
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Yang H, Liu D, Ju J, Li J, Wang Z, Yan G, Ji Y, Zhang W, Sun G, Li L. Chain Deformation on the Formation of Shish Nuclei under Extension Flow: An in Situ SANS and SAXS Study. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01945] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Haoran Yang
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Dong Liu
- Key Laboratory of Neutron Physics and Institute
of Nuclear Physics and Chemistry, China Academy of Engineering Physics (CAEP), Mianyang 621999, China
| | - Jianzhu Ju
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jing Li
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Zhen Wang
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Guanyun Yan
- Key Laboratory of Neutron Physics and Institute
of Nuclear Physics and Chemistry, China Academy of Engineering Physics (CAEP), Mianyang 621999, China
| | - Youxin Ji
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Wenhua Zhang
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Guangai Sun
- Key Laboratory of Neutron Physics and Institute
of Nuclear Physics and Chemistry, China Academy of Engineering Physics (CAEP), Mianyang 621999, China
| | - Liangbin Li
- National Synchrotron
Radiation Lab and CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China
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32
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Sha Y, Xu Y, Qi D, Wan Y, Li L, Li H, Wang X, Xue G, Zhou D. Synthesis of Heterotelechelic α,ω-Dye-Labeled Polymer and Energy Transfer between the Chain Ends. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01726] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ye Sha
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
| | - Yunlong Xu
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210046, P. R. China
| | - Dongliang Qi
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
| | - Yuanxin Wan
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
| | - Linling Li
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
| | - Hong Li
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210046, P. R. China
| | - Xiaoliang Wang
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
| | - Gi Xue
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
| | - Dongshan Zhou
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Key Laboratory of High Performance Polymer Materials
and Technology (Nanjing University), Ministry of Education, State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructure, Nanjing University, Nanjing 210093, P. R. China
- School
of Physical Science and Technology, Xinjiang Key Laboratory and Phase
Transitions and Microstructures in Condensed Matters, Yili Normal University, Yining 835000, P. R. China
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33
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Jouault N, Jestin J. Intra- and Interchain Correlations in Polymer Nanocomposites: A Small-Angle Neutron Scattering Extrapolation Method. ACS Macro Lett 2016; 5:1095-1099. [PMID: 35658187 DOI: 10.1021/acsmacrolett.6b00500] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this Letter we applied for the first time a small-angle neutron scattering (SANS) extrapolation method to study the influence of nanoparticles (NPs) on polymer chain conformation in polymer nanocomposites (PNCs). This new approach is based on a perfect NP matching thanks to a statistical hydrogenated (H)/ deuterated (D) polymer matrix in which a certain amount of labeled chain (H) is added. The extrapolation to zero H content gives the intrachain structure factor, S1(q), and the interchain correlations, S2(q), the latter not being accessible under the zero average contrast (ZAC) condition preferentially used in the previous studies. We validate the method on well-known silica/polystyrene (PS) PNCs and compare the results with our previous ZAC measurements. The analysis of both S1(q) and S2(q) shows (i) no significant modifications of the radius of gyration Rg of the chain and of the interchain interaction induced by the presence of NPs and more interestingly (ii) the existence of chain domains with lower densities included inside NP clusters as the result of excluded volume effects that create an extra scattering at low q. The extrapolation method unambiguously shows that the unexpected behavior observed at low q comes from the chains and not from the unmatched NPs.
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Affiliation(s)
- Nicolas Jouault
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case
51, 4 place Jussieu, F-75005 Paris, France
| | - Jacques Jestin
- Laboratoire
Léon Brillouin (LLB), CEA Saclay, 91191 Gif-Sur-Yvette, France
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34
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Mathioudakis IG, Vogiatzis GG, Tzoumanekas C, Theodorou DN. Multiscale simulations of PS-SiO2 nanocomposites: from melt to glassy state. SOFT MATTER 2016; 12:7585-7605. [PMID: 27532769 DOI: 10.1039/c6sm01536k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interaction energetics, molecular packing, entanglement network properties, segmental dynamics, and elastic constants of atactic polystyrene-amorphous silica nanocomposites in the molten and the glassy state are studied via molecular simulations using two interconnected levels of representation: (a) a coarse-grained one, wherein each polystyrene repeat unit is mapped onto a single "superatom" and the silica nanoparticle is viewed as a solid sphere. Equilibration at all length scales at this level is achieved via connectivity-altering Monte Carlo simulations. (b) A united-atom (UA) level, wherein the polymer chains are represented in terms of a united-atom forcefield and the silica nanoparticle is represented in terms of a simplified, fully atomistic model. Initial configurations for UA molecular dynamics (MD) simulations are obtained by reverse mapping well-equilibrated coarse-grained configurations. By analysing microcanonical UA MD trajectories, the polymer density profile is studied and the polymer is found to exhibit layering in the vicinity of the nanoparticle surface. An estimate of the enthalpy of mixing between polymer and nanoparticles, derived from the UA simulations, compares favourably against available experimental values. The dynamical behaviour of polystyrene (in neat and filled melt systems) is characterized in terms of bond orientation and dihedral angle time autocorrelation functions. At low concentration in the molten polymer matrix, silica nanoparticles are found to cause a slight deceleration of the segmental dynamics close to their surface compared to the bulk polymer. Well-equilibrated coarse-grained long-chain configurations are reduced to entanglement networks via topological analysis with the CReTA algorithm, yielding a slightly lower density of entanglements in the filled than in the neat systems. UA melt configurations are glassified by MD cooling. The elastic moduli of the resulting glassy nanocomposites are computed through an analysis of strain fluctuations in the undeformed state and through explicit mechanical deformation by MD, showing a stiffening of the polymer in the presence of nanoparticles. UA simulation results for the elastic constants are compared to continuum micromechanical calculations invoked in homogenization models of the overall mechanical behaviour of heterogeneous materials. They can be interpreted in terms of the presence of an "interphase" of approximate thickness 2 nm around the nanoparticles, with elastic constants intermediate between those of the filler and the matrix.
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Affiliation(s)
- I G Mathioudakis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, GR-15780 Athens, Greece.
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35
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Murakami D, Norizoe Y, Higaki Y, Takahara A, Jinnai H. Direct Characterization of In-Plane Phase Separation in Polystyrene Brush/Cyclohexane System. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00151] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Daiki Murakami
- Japan
Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces
Project, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute
for Materials Chemistry and Engineering (IMCE), Kyushu University, CE41, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuki Norizoe
- Japan
Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces
Project, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuji Higaki
- Japan
Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces
Project, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute
for Materials Chemistry and Engineering (IMCE), Kyushu University, CE41, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Atsushi Takahara
- Japan
Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces
Project, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute
for Materials Chemistry and Engineering (IMCE), Kyushu University, CE41, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroshi Jinnai
- Japan
Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces
Project, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute
for Materials Chemistry and Engineering (IMCE), Kyushu University, CE41, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
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36
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Chennevière A, Cousin F, Boué F, Drockenmuller E, Shull KR, Léger L, Restagno F. Direct Molecular Evidence of the Origin of Slip of Polymer Melts on Grafted Brushes. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02505] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexis Chennevière
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Fabrice Cousin
- Laboratoire
Léon Brillouin CEA, CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - François Boué
- Laboratoire
Léon Brillouin CEA, CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - Eric Drockenmuller
- Ingénierie
des Matériaux Polymères, CNRS, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Kenneth R. Shull
- Department
of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Liliane Léger
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Frédéric Restagno
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
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37
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Sabzevari SM, McGraw JD, Jacobs K, Wood–Adams P. Sacrificial mica substrates influence the slip boundary condition of dewetting polymer films. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.08.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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38
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Serenko OA, Roldugin VI, Novozhilova NA, Soldatov MA, Nikiforova GG, Mironova MV, Ilyin SO, Kulichikhin VG, Muzafarov AM. Phase structure and properties of blends based on polystyrene and carbosilane dendrimers. POLYMER SCIENCE SERIES A 2015. [DOI: 10.1134/s0965545x15050156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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39
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Structure and dynamics of polymer nanocomposites studied by X-ray and neutron scattering techniques. Curr Opin Colloid Interface Sci 2015. [DOI: 10.1016/j.cocis.2015.10.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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40
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Chen T, Qian HJ, Zhu YL, Lu ZY. Structure and Dynamics Properties at Interphase Region in the Composite of Polystyrene and Cross-Linked Polystyrene Soft Nanoparticle. Macromolecules 2015. [DOI: 10.1021/ma502383n] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Tao Chen
- State
Key Laboratory of Supramolecular Structure and Materials, Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, China
| | - Hu-Jun Qian
- State
Key Laboratory of Supramolecular Structure and Materials, Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, China
| | - You-Liang Zhu
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Zhong-Yuan Lu
- State
Key Laboratory of Supramolecular Structure and Materials, Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, China
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41
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Vao-Soongnern V. A multiscale simulation model for poly(ethylene oxide). POLYMER SCIENCE SERIES A 2014. [DOI: 10.1134/s0965545x14060121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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42
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Fitzgerald BW, Lentzakis H, Sakellariou G, Vlassopoulos D, Briels WJ. A computational and experimental study of the linear and nonlinear response of a star polymer melt with a moderate number of unentangled arms. J Chem Phys 2014; 141:114907. [PMID: 25240372 DOI: 10.1063/1.4895610] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
We present from simulations and experiments results on the linear and nonlinear rheology of a moderate functionality, low molecular weight unentangled polystyrene (PS) star melt. The PS samples were anionically synthesized and close to monodisperse while their moderate functionality ensures that they do not display a pronounced core effect. We employ a highly coarse-grained model known as Responsive Particle Dynamics where each star polymer is approximated as a point particle. The eliminated degrees of freedom are used in the definition of an appropriate free energy as well as describing the transient pair-wise potential between particles that accounts for the viscoelastic response. First we reproduce very satisfactorily the experimental moduli using simulation. We then consider the nonlinear response of the same polymer melts by implementing a start-up shear protocol for a wide range of shear rates. As in experiments, we observe the development of a stress overshoot with increasing shear rate followed by a steady-state shear stress. We also recover the shear-thinning nature of the melt, although we slightly overestimate the extent of shear-thinning with simulations. In addition, we study relaxations upon the removal of shear where we find encouraging agreement between experiments and simulations, a finding that corroborates our agreement for the linear rheology.
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Affiliation(s)
- Barry W Fitzgerald
- Computational Biophysics, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Helen Lentzakis
- Foundation for Research and Technology (FORTH), Institute of Electronic Structure and Laser, Heraklion 71110, Crete, Greece
| | | | - Dimitris Vlassopoulos
- Foundation for Research and Technology (FORTH), Institute of Electronic Structure and Laser, Heraklion 71110, Crete, Greece
| | - Wim J Briels
- Computational Biophysics, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
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43
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Vogiatzis GG, Theodorou DN. Local Segmental Dynamics and Stresses in Polystyrene–C60 Mixtures. Macromolecules 2013. [DOI: 10.1021/ma402214r] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Georgios G. Vogiatzis
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou
Campus, GR-15780 Athens, Greece
| | - Doros N. Theodorou
- School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou
Campus, GR-15780 Athens, Greece
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44
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45
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Navarro R, Pérez Perrino M, Prucker O, Rühe J. Preparation of surface-attached polymer layers by thermal or photochemical activation of α-diazoester moieties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10932-10939. [PMID: 23863133 DOI: 10.1021/la402323k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the attachment of polymer monolayers or surface-attached, polymer networks onto SiO2 and/or polymer surfaces using thermo- and photoreactive α-diazoester groups. In the prior case, the α-diazoester groups are introduced into the system in the form of self-assembled monolayers of appropriately functionalized silanes. The monolayer decorated substrates are coated by polymer films and the α-diazoester groups in the monolayer are activated by heat or irradiation with UV-light. Upon activation, they cleave off nitrogen and the resulting carbene intermediates insert into C-H bonds of neighboring polymer chains. As a result of this binding process, surface-attached monolayers of the deposited polymer are obtained. When the polymers themselves carry such reactive moieties, the photo- or thermal activation leads to cross-linking of the polymers and thin surface-attached polymer networks result from the same process. The formation of the surface-attached layer is studied as a function of activation conditions, especially the temperature and the wavelength of the light used in the process.
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Affiliation(s)
- Rodrigo Navarro
- Instituto de Ciencia y Tecnología de Polímeros (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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46
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Chennevière A, Drockenmuller E, Damiron D, Cousin F, Boué F, Restagno F, Léger L. Quantitative Analysis of Interdigitation Kinetics between a Polymer Melt and a Polymer Brush. Macromolecules 2013. [DOI: 10.1021/ma4007335] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexis Chennevière
- Laboratoire de physique des
solides, CNRS, Université Paris-Sud, Bât. 510 Campus Universitaire, 91405 Orsay Cedex, France
| | - Eric Drockenmuller
- Ingénierie des Matériaux
Polymères, CNRS, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex,
France
| | - Denis Damiron
- Ingénierie des Matériaux
Polymères, CNRS, Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex,
France
| | - Fabrice Cousin
- Laboratoire Léon
Brillouin
CEA, CNRS, CEA Saclay 91191, Gf sur Yvette
Cedex, France
| | - François Boué
- Laboratoire Léon
Brillouin
CEA, CNRS, CEA Saclay 91191, Gf sur Yvette
Cedex, France
| | - Frédéric Restagno
- Laboratoire de physique des
solides, CNRS, Université Paris-Sud, Bât. 510 Campus Universitaire, 91405 Orsay Cedex, France
| | - Liliane Léger
- Laboratoire de physique des
solides, CNRS, Université Paris-Sud, Bât. 510 Campus Universitaire, 91405 Orsay Cedex, France
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47
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Ilyin SO, Kulichikhin VG, Malkin AY. Unusual rheological effects observed in polyacrylonitrile solutions. POLYMER SCIENCE SERIES A 2013. [DOI: 10.1134/s0965545x13070018] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Kim KO, Choi TL. Synthesis of Dendronized Polymers via Macromonomer Approach by Living ROMP and Their Characterization: From Rod-Like Homopolymers to Block and Gradient Copolymers. Macromolecules 2013. [DOI: 10.1021/ma401132u] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Kyung Oh Kim
- Department of Chemistry, Seoul National
University,
Seoul, 151-747, Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National
University,
Seoul, 151-747, Korea
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49
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Noirez L, Stillings C, Bardeau JF, Steinhart M, Schlitt S, Wendorff JH, Pépy G. What Happens to Polymer Chains Confined in Rigid Cylindrical Inorganic (AAO) Nanopores. Macromolecules 2013. [DOI: 10.1021/ma4005605] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L. Noirez
- Laboratoire Léon Brillouin
(CEA-CNRS), CE-Saclay, 91191 Gif-sur-Yvette
Cédex, France
| | - C. Stillings
- Fachbereich Chemie, Philipps-Universität Marburg, D-35032 Marburg,
Germany
| | - J.-F. Bardeau
- Institut des Molécules
et Matériaux du Mans, UMR CNRS 6283, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans, France
| | - M. Steinhart
- Institut für Chemie neuer
Materialien, Universität Osnabrück, Barbarastrasse 7, D-49069, Osnabrück, Germany
| | - S. Schlitt
- Fachbereich Chemie, Philipps-Universität Marburg, D-35032 Marburg,
Germany
| | - J. H. Wendorff
- Fachbereich Chemie, Philipps-Universität Marburg, D-35032 Marburg,
Germany
| | - G. Pépy
- Research Institute for Solid State Physics and Optics, 1525 Budapest, Pf.
49. Hungary
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50
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Aoki H, Mori K, Takahashi T, Ito S. Quantitative analysis of end-to-end distance of single polymer chain in ultra-thin film by super-resolution fluorescence imaging. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2012.12.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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