1
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Shafqat N, Alegría A, Malicki N, Dronet S, Mangin-Thro L, Frick B, Colmenero J, Arbe A. Microscopic versus Macroscopic Glass Transition(s) in Blends of Industrial Interest. EPJ WEB OF CONFERENCES 2022. [DOI: 10.1051/epjconf/202227201008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We investigate by neutron scattering and calorimetry a mixture of styrene-butadiene rubber (SBR) and a commercial resin. The neat materials present a large dynamic contrast, having SBR a much lower glass-transition temperature than the resin. The focus is to exploit neutron scattering selectivity in an isotopically labelled sample where deuterated SBR is the majority component. This direct insight into the resin atomic motions within the mixture allows determining the ‘microscopic’ glass transition of the resin in the presence of the a priori much more mobile SBR. This transition takes place in the vicinity of the initial calorimetric glass transition temperature, mainly dictated by the majority component.
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2
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Dubey V, Dueby S, Daschakraborty S. Breakdown of the Stokes-Einstein relation in supercooled water: the jump-diffusion perspective. Phys Chem Chem Phys 2021; 23:19964-19986. [PMID: 34515269 DOI: 10.1039/d1cp02202d] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although water is the most ubiquitous liquid it shows many thermodynamic and dynamic anomalies. Some of the anomalies further intensify in the supercooled regime. While many experimental and theoretical studies have focused on the thermodynamic anomalies of supercooled water, fewer studies explored the dynamical anomalies very extensively. This is due to the intricacy of the experimental measurement of the dynamical properties of supercooled water. Violation of the Stokes-Einstein relation (SER), an important relation connecting the diffusion of particles with the viscosity of the medium, is one of the major dynamical anomalies. In absence of experimentally measured viscosity, researchers used to check the validity of SER indirectly using average translational relaxation time or α-relaxation time. Very recently, the viscosity of supercooled water was accurately measured at a wide range of temperatures and pressures. This allowed direct verification of the SER at different temperature-pressure thermodynamic state points. An increasing breakdown of the SER was observed with decreasing temperature. Increasing pressure reduces the extent of breakdown. Although some well-known theories explained the above breakdown, a detailed molecular mechanism was still elusive. Recently, a translational jump-diffusion (TJD) approach has been able to quantitatively explain the breakdown of the SER in pure supercooled water and an aqueous solution of methanol. The objective of this article is to present a detailed and state-of-the-art analysis of the past and present works on the breakdown of SER in supercooled water with a specific focus on the new TJD approach for explaining the breakdown of the SER.
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Affiliation(s)
- Vikas Dubey
- Department of Chemistry, Indian Institute of Technology Patna, Bihar 801106, India.
| | - Shivam Dueby
- Department of Chemistry, Indian Institute of Technology Patna, Bihar 801106, India.
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3
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Chen XC, Sacci RL, Osti NC, Tyagi M, Wang Y, Keum JK, Dudney NJ. Study of the Segmental Dynamics and Ion Transport of Solid Polymer Electrolytes in the Semi-crystalline State. Front Chem 2021; 8:592604. [PMID: 33520929 PMCID: PMC7838558 DOI: 10.3389/fchem.2020.592604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Abstract
Solid polymer electrolytes are promising in fulfilling the requirements for a stable lithium metal anode toward higher energy and power densities. In this work, we investigate the segmental dynamics, ionic conductivity, and crystallinity of a polymer electrolyte consisting of poly(ethylene oxide) (PEO) and lithium triflate salt, in the semi-crystalline state. Using quasi-elastic neutron scattering, the segmental dynamics of PEO chains confined between the crystalline lamellae is quantified, using Cole-Cole analysis. We show that the structural relaxation time, τ0, of PEO equilibrated near room temperature is six-fold longer than the same sample that had just cooled down to room temperature. This corresponds to a three-fold smaller ionic conductivity in the equilibrated condition. This work reveals that the segmental dynamics of semi-crystalline polymer electrolytes is very sensitive to thermal history. We demonstrate that quasi-elastic neutron scattering can be used to characterize the ion transport and segmental dynamics in the semi-crystalline state.
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Affiliation(s)
- Xi Chelsea Chen
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Robert L. Sacci
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Naresh C. Osti
- Neutron Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Madhusudan Tyagi
- National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, MD, United States
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, United States
| | - Yangyang Wang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Jong K. Keum
- Neutron Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Nancy J. Dudney
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
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4
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Dyatkin B, Osti NC, Smith RW, Tyagi M, Butler T, Laskoski M. Chemical structure and curing dynamics of bisphenol S,
PEEK
TM
‐like, and resveratrol phthalonitrile thermoset resins. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Boris Dyatkin
- Code 6127, Chemistry Division US Naval Research Laboratory Washington District of Columbia USA
| | - Naresh C. Osti
- Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee USA
| | - Robert W. Smith
- Computer Science and Mathematics Division Oak Ridge National Laboratory Oak Ridge Tennessee USA
| | - Madhusudan Tyagi
- NIST Center for Neutron Research National Institute of Standards and Technology Gaithersburg Maryland USA
- Department of Materials Science and Engineering University of Maryland College Park Maryland USA
| | - Tristan Butler
- Code 6127, Chemistry Division US Naval Research Laboratory Washington District of Columbia USA
- Former NRC Post‐doctoral Associate U.S. Naval Research Laboratory Washington District of Columbia USA
| | - Matthew Laskoski
- Code 6127, Chemistry Division US Naval Research Laboratory Washington District of Columbia USA
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5
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Zainal NFA, Lai SA, Chan CH. Melt Rheological Behavior and Morphology of Poly(ethylene oxide)/Natural Rubber- graft-Poly(methyl methacrylate) Blends. Polymers (Basel) 2020; 12:E724. [PMID: 32213997 PMCID: PMC7183091 DOI: 10.3390/polym12030724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/18/2020] [Accepted: 03/20/2020] [Indexed: 11/17/2022] Open
Abstract
The influence of morphology on the rheological properties of poly(ethylene oxide) (PEO) and natural rubber-graft-poly(methyl methacrylate) (NR-g-PMMA) blends in the melt was investigated. The blends were prepared at different blend compositions by a solution-casting method. Linear viscoelastic shear oscillations measurements were performed in order to determine the elastic and viscous properties of the blends in the melt. The rheological results suggested that the blending of the two constituents reduced the elasticity and viscosity of the blends. The addition of an even small amount of NR-g-PMMA to PEO changed the liquid-like behavior of PEO to more solid-like behavior. Morphological investigations were carried out by optical microscopy to establish the relationship between morphology and melt viscosity. Depending on the blend compositions and viscosities, either droplet-matrix or co-continuous morphologies was observed. PEO/NR-g-PMMA blends exhibited a broad co-continuity range, and phase inversion was suggested to occur at the PEO/NR-g-PMMA blend with a mass ratio of 60/40 (m/m), when NR-g-PMMA was added to PEO as a matrix.
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Affiliation(s)
- Nurul Fatahah Asyqin Zainal
- Centre of Foundation Studies, Universiti Teknologi MARA, Cawangan Selangor, Kampus Dengkil, Dengkil 43800, Selangor, Malaysia;
| | - Say Aik Lai
- TA Instruments Sdn. Bhd. D7-1-G Block D7 Pusat Perdagangan Dana 1, Jalan PJU 1A/46, Petaling Jaya 47301, Selangor, Malaysia;
| | - Chin Han Chan
- Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
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6
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Yang S, Akcora P. Deformation of Chemically Heterogeneous Interfacial Layers of Polymer Nanocomposites. ACS Macro Lett 2019; 8:1635-1641. [PMID: 35619398 DOI: 10.1021/acsmacrolett.9b00821] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dynamics of entangled interfacial polymer layers around nanoparticles determine the linear rheological properties of polymer nanocomposites. In this study, the nonlinear elastic properties of nanocomposites are examined under large-amplitude oscillatory shear (LAOS) flow to reveal the effect of interfacial chemical heterogeneity on the deformation mechanism of polymer-grafted and polymer-adsorbed nanoparticle composites. Adsorbed-poly(methyl methacrylate) (PMMA) layers presented stronger interfacial stiffening and reinforcement than PMMA-grafted layers. Chemical heterogeneities of interfacial layers, provided by polymer-adsorbed and low graft density particles, deformed at smaller strains than the poly(ethylene oxide) (PEO) matrix. Interfaces of loosely bound PMMA and PEO exhibited stiffening at low strains due to the enhanced chain mixing and entanglements. These results demonstrate that chemical and dynamic heterogeneities in interfacial layers have significant importance in designing adaptive polymer nanocomposites for large shear deformation.
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Affiliation(s)
- Siyang Yang
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Pinar Akcora
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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7
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Senses E, Tyagi M, Pasco M, Faraone A. Dynamics of Architecturally Engineered All-Polymer Nanocomposites. ACS NANO 2018; 12:10807-10816. [PMID: 30299918 PMCID: PMC11168023 DOI: 10.1021/acsnano.8b02514] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present nanocomposite materials formed by using glassy star-shaped polymers as nanofillers and dispersing them in soft matrices. The resulting "architecturally engineered" polymer nanocomposites structurally reside between the linear homopolymer blends and the conventional polymer nanocomposites with inorganic fillers, inducing reinforcement, which can be as strong as that of solid nanoparticles, or softening depending on the compactness and concentration of the nanoparticles. Such behavior can be traced back to the dynamical features at the local segmental and the chain level, which we investigated using neutron scattering over a wide range of time and length scales in the glassy and melt states of the nanocomposites. The local and segmental dynamics as well as the degree of chain-chain entanglements are all modified by the star-shaped fillers. The presented approach to tuning the physical properties of all-polymer-based nanocomposites is readily adaptable to other polymer architectures with immediate applications in numerous areas including gas separation membranes, tissue engineering, drug delivery, and functional coatings.
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Affiliation(s)
- Erkan Senses
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg , Maryland 20899-8562 United States
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20742-2115 , United States
- Department of Chemical and Biological Engineering , Koc University , Rumelifeneri Yolu, 34450 , Sariyer , Istanbul , Turkey
| | - Madhusudan Tyagi
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg , Maryland 20899-8562 United States
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20742-2115 , United States
| | - Madeleine Pasco
- Department of Biology , Rose-Hulman Institute of Technology , Terre Haute , Indiana 47803 , United States
| | - Antonio Faraone
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg , Maryland 20899-8562 United States
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8
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Agbolaghi S, Abbaspoor S, Abbasi F. A comprehensive review on polymer single crystals—From fundamental concepts to applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.11.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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9
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Sharma RP, Green PF. Component Dynamics in Polymer/Polymer Blends: Role of Spatial Compositional Heterogeneity. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00092] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ravi P. Sharma
- Department
of Materials Science and Engineering and ‡Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Peter F. Green
- Department
of Materials Science and Engineering and ‡Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
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10
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11
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Senses E, Isherwood A, Akcora P. Reversible Thermal Stiffening in Polymer Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14682-14689. [PMID: 26083305 DOI: 10.1021/acsami.5b02046] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Miscible polymer blends with different glass transition temperatures (Tg) are known to create confined interphases between glassy and mobile chains. Here, we show that nanoparticles adsorbed with a high-Tg polymer, poly(methyl methacrylate), and dispersed in a low-Tg matrix polymer, poly(ethylene oxide), exhibit a liquid-to-solid transition at temperatures above Tg's of both polymers. The mechanical adaptivity of nanocomposites to temperature underlies the existence of dynamically asymmetric bound layers on nanoparticles and more importantly reveals their impact on macroscopic mechanical response of composites. The unusual reversible stiffening behavior sets these materials apart from conventional polymer composites that soften upon heating. The presented stiffening mechanism in polymer nanocomposites can be used in applications for flexible electronics or mechanically induced actuators responding to environmental changes like temperature or magnetic fields.
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Affiliation(s)
- Erkan Senses
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Andrew Isherwood
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Pinar Akcora
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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12
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Ashkar R, Abdul Baki M, Tyagi M, Faraone A, Butler P, Krishnamoorti R. Kinetic Polymer Arrest in Percolated SWNT Networks. ACS Macro Lett 2014; 3:1262-1265. [PMID: 35610837 DOI: 10.1021/mz500636s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Particle-polymer attractions in nanocomposites can cause significant heterogeneities in the polymer dynamics and remarkably impact the material properties. Dynamical perturbations are generally expected to be limited to interfacial polymer segments. However, composites with highly anisotropic nanoparticles usually exhibit very low percolation thresholds. In such systems, the overlapping interfacial regions could result in a complex polymer relaxation behavior that is unanticipated from dilute nanoparticle dispersions in polymer matrices. To understand this behavior, we examine a system of percolated single-wall carbon nanotubes (SWNT) in a polymer matrix, PMMA, which is known to have strong interfacial binding. Neutron spectroscopy measurements on the composites reveal not only an interfacial polymer layer that is transiently pinned to the SWNT surface, but suggest that the percolated network forms a kinetic cage that dramatically restricts both local and cooperative relaxations of noninterfacial polymer segments. These findings should help guide theories and simulations of hierarchical polymer dynamics in nanocomposites.
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Affiliation(s)
- Rana Ashkar
- Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Mansour Abdul Baki
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Madhusudan Tyagi
- Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Antonio Faraone
- Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Paul Butler
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Department of Chemical Engineering, University of Delaware, Newark, Delaware 19711, United States
| | - Ramanan Krishnamoorti
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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13
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Bhowmik D, Pomposo JA, Juranyi F, García-Sakai V, Zamponi M, Su Y, Arbe A, Colmenero J. Microscopic Dynamics in Nanocomposites of Poly(ethylene oxide) and Poly(methyl methacrylate) Soft Nanoparticles: A Quasi-Elastic Neutron Scattering Study. Macromolecules 2013. [DOI: 10.1021/ma402023n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- D. Bhowmik
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - J. A. Pomposo
- Centro de Física de Materiales (CSIC−UPV/EHU)—Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Física de Materiales (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- IKERBASQUE—Basque Foundation for Science, Alameda Urquijo 36, 48011 Bilbao, Spain
| | - F. Juranyi
- Laboratory
for Neutron Scattering, Paul Scherrer Institut CH-5232 Villigen, Switzerland
| | - V. García-Sakai
- ISIS Facility, Rutherford Appleton Laboratory, Harwell Science & Innovation Campus, Chilton, Didcot, OX11 0QX, U.K
| | - M. Zamponi
- Jülich
Centre for Neutron Science, Forschungszentrum Jülich GmbH, outstation at Heinz
Maier-Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Y. Su
- Jülich
Centre for Neutron Science, Forschungszentrum Jülich GmbH, outstation at Heinz
Maier-Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - A. Arbe
- Centro de Física de Materiales (CSIC−UPV/EHU)—Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - J. Colmenero
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
- Centro de Física de Materiales (CSIC−UPV/EHU)—Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
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14
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Colmenero J, Brodeck M, Arbe A, Richter D. Dynamics of Poly(butylene oxide) Well above the Glass Transition. A Fully Atomistic Molecular Dynamics Simulation Study. Macromolecules 2013. [DOI: 10.1021/ma302452t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Colmenero
- Centro de Física de Materiales (CSIC-UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018
San Sebastián, Spain
| | - M. Brodeck
- Jülich Center for Neutron
Science and Institut for Complex Systems, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
| | - A. Arbe
- Centro de Física de Materiales (CSIC-UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - D. Richter
- Jülich Center for Neutron
Science and Institut for Complex Systems, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
- Jülich Center for Neutron Science, Outstation at FRM II, 85747 Garching,
Germany
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15
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Ghelichi M, Qazvini NT, Jafari SH, Khonakdar HA, Farajollahi Y, Scheffler C. Conformational, thermal, and ionic conductivity behavior of PEO in PEO/PMMA miscible blend: Investigating the effect of lithium salt. J Appl Polym Sci 2012. [DOI: 10.1002/app.38897] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Colmenero J, Arbe A. Recent progress on polymer dynamics by neutron scattering: From simple polymers to complex materials. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/polb.23178] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Jeddi K, Qazvini NT, Cangialosi D, Chen P. Correlation Between Segmental Dynamics, Glass Transition, and Lithium Ion Conduction in Poly(Methyl Methacrylate)/Ionic Liquid Mixture. J MACROMOL SCI B 2012. [DOI: 10.1080/00222348.2012.725640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Kazem Jeddi
- a Department of Chemical Engineering , University of Waterloo , Waterloo , Ontario , Canada
| | - Nader Taheri Qazvini
- b School of Chemistry, College of Science , University of Tehran , Tehran , Iran
| | - Daniele Cangialosi
- c Centro de Física de Materiales (CFM) (CSIC-UPV/EHU) , San Sebastián , Spain
| | - P. Chen
- a Department of Chemical Engineering , University of Waterloo , Waterloo , Ontario , Canada
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18
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Busselez R, Arbe A, Cerveny S, Capponi S, Colmenero J, Frick B. Component dynamics in polyvinylpyrrolidone concentrated aqueous solutions. J Chem Phys 2012; 137:084902. [DOI: 10.1063/1.4746020] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Zardalidis G, Floudas G. Pressure Effects on the Dynamic Heterogeneity of Miscible Poly(vinyl acetate)/Poly(ethylene oxide) Blends. Macromolecules 2012. [DOI: 10.1021/ma301086a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- George Zardalidis
- Department of Physics, University of Ioannina, P.O. Box 1186, GR-45110 Ioannina,
Greece, and Foundation for Research and Technology-Hellas (FORTH), Biomedical Research Institute (BRI), Ioannina, Greece
| | - George Floudas
- Department of Physics, University of Ioannina, P.O. Box 1186, GR-45110 Ioannina,
Greece, and Foundation for Research and Technology-Hellas (FORTH), Biomedical Research Institute (BRI), Ioannina, Greece
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20
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Gerstl C, Schneider GJ, Fuxman A, Zamponi M, Frick B, Seydel T, Koza M, Genix AC, Allgaier J, Richter D, Colmenero J, Arbe A. Quasielastic Neutron Scattering Study on the Dynamics of Poly(alkylene oxide)s. Macromolecules 2012. [DOI: 10.1021/ma3003399] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Gerstl
- Jülich Centre
for Neutron Science (JCNS 1) and Institut for Complex Systems (ICS
1), Forschungszentrum Jülich GmbH, D−52425 Jülich, Germany
- Jülich Centre for Neutron Science (JCNS 1), Outstation at FRM II, 85747 Garching, Germany
| | - G. J. Schneider
- Jülich Centre for Neutron Science (JCNS 1), Outstation at FRM II, 85747 Garching, Germany
| | - A. Fuxman
- Jülich Centre for Neutron Science (JCNS 1), Outstation at FRM II, 85747 Garching, Germany
| | - M. Zamponi
- Jülich Centre for Neutron Science (JCNS 1), Outstation at FRM II, 85747 Garching, Germany
| | - B. Frick
- Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - T. Seydel
- Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - M. Koza
- Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - A.-C. Genix
- Laboratoire Charles Coulomb, UMR 5221, CNRS and Université Montpellier 2, 34095 Montpellier,
France
| | - J. Allgaier
- Jülich Centre
for Neutron Science (JCNS 1) and Institut for Complex Systems (ICS
1), Forschungszentrum Jülich GmbH, D−52425 Jülich, Germany
| | - D. Richter
- Jülich Centre
for Neutron Science (JCNS 1) and Institut for Complex Systems (ICS
1), Forschungszentrum Jülich GmbH, D−52425 Jülich, Germany
- Jülich Centre for Neutron Science (JCNS 1), Outstation at FRM II, 85747 Garching, Germany
| | - J. Colmenero
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San
Sebastián, Spain
- Departamento de Física de Materiales (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián,
Spain
| | - A. Arbe
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San
Sebastián, Spain
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21
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22
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Zhao J, Ediger MD. Segmental Dynamics of Dilute Poly(ethylene oxide) in Low and High Molecular Weight Glass-Formers. Macromolecules 2011. [DOI: 10.1021/ma201889b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junshu Zhao
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - M. D. Ediger
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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Capponi S, Arbe A, Cerveny S, Busselez R, Frick B, Embs JP, Colmenero J. Quasielastic neutron scattering study of hydrogen motions in an aqueous poly(vinyl methyl ether) solution. J Chem Phys 2011; 134:204906. [PMID: 21639476 DOI: 10.1063/1.3592560] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a quasielastic neutron scattering (QENS) investigation of the component dynamics in an aqueous Poly(vinyl methyl ether) (PVME) solution (30% water content in weight). In the glassy state, an important shift in the Boson peak of PVME is found upon hydration. At higher temperatures, the diffusive-like motions of the components take place with very different characteristic times, revealing a strong dynamic asymmetry that increases with decreasing T. For both components, we observe stretching of the scattering functions with respect to those in the bulk and non-Gaussian behavior in the whole momentum transfer range investigated. To explain these observations we invoke a distribution of mobilities for both components, probably originated from structural heterogeneities. The diffusive-like motion of PVME in solution takes place faster and apparently in a more continuous way than in bulk. We find that the T-dependence of the characteristic relaxation time of water changes at T ≲ 225 K, near the temperature where a crossover from a low temperature Arrhenius to a high temperature cooperative behavior has been observed by broadband dielectric spectroscopy (BDS) [S. Cerveny, J. Colmenero and A. Alegría, Macromolecules, 38, 7056 (2005)]. This observation might be a signature of the onset of confined dynamics of water due to the freezing of the PVME dynamics, that has been selectively followed by these QENS experiments. On the other hand, revisiting the BDS results on this system we could identify an additional "fast" process that can be attributed to water motions coupled with PVME local relaxations that could strongly affect the QENS results. Both kinds of interpretations, confinement effects due to the increasing dynamic asymmetry and influence of localized motions, could provide alternative scenarios to the invoked "strong-to-fragile" transition.
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Affiliation(s)
- S Capponi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain.
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24
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Madathingal RR, Wunder SL. Confinement Effects of Silica Nanoparticles with Radii Smaller and Larger than Rg of Adsorbed Poly(ethylene oxide). Macromolecules 2011. [DOI: 10.1021/ma1021693] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Stephanie L. Wunder
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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25
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Bruni F, Mancinelli R, Ricci MA. Multiple relaxation processes versus the fragile-to-strong transition in confined water. Phys Chem Chem Phys 2011; 13:19773-9. [DOI: 10.1039/c1cp22029b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Jeddi K, Qazvini NT, Hassan Jafari S, Ali Khonakdar H, Seyfi J, Reuter U. Investigating the effect of nanolayered silicates on blend segmental dynamics and minor component relaxation behavior in poly(ethylene oxide)/poly(methyl methacrylate) miscible blends. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22168] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Jeddi K, Qazvini NT, Jafari SH, Khonakdar HA. Enhanced ionic conductivity in PEO/PMMA glassy miscible blends: Role of nano-confinement of minority component chains. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22086] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Krutyeva M, Martin J, Arbe A, Colmenero J, Mijangos C, Schneider GJ, Unruh T, Su Y, Richter D. Neutron scattering study of the dynamics of a polymer melt under nanoscopic confinement. J Chem Phys 2010; 131:174901. [PMID: 19895040 DOI: 10.1063/1.3258329] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Poly(ethylene oxide) confined in an anodic aluminum oxide solid matrix has been studied by different neutron scattering techniques in the momentum transfer (Q) range 0.2<or=Q=/Q/<or=1.9 A(-1). The cylindrical pores of the matrix present a diameter (40 nm) much smaller than their length (150 microm) and are parallel and hexagonally ordered. In particular, we investigated the neutron intensity scattered for two orientations of the sample with respect to the incident beam, for which the Q direction was either parallel or perpendicular to the pores for a scattering angle of 90 degrees . Diffuse neutron scattering at room temperature has shown that the aluminum oxide has amorphous structure and the polymer in the nanoporous matrix is partially crystallized. Concerning the dynamical behavior, for Q<1 A(-1), the spectra show Rouse-like motions indistinguishable from those in the bulk within the uncertainties. In the high-Q limit we observe a slowing down of the dynamics with respect to the bulk behavior that evidences an effect of confinement. This effect is more pronounced for molecular displacements perpendicular to the pore axis than for parallel displacements. Our results clearly rule out the strong corset effect proposed for this polymer from nuclear magnetic resonance (NMR) studies and can be rationalized by assuming that the interactions with the pore walls affect one to two adjacent monomer monolayers.
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29
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Fragiadakis D, Runt J. Microstructure and Dynamics of Semicrystalline Poly(ethylene oxide)−Poly(vinyl acetate) Blends. Macromolecules 2009. [DOI: 10.1021/ma9020938] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel Fragiadakis
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - James Runt
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
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30
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31
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Dalle-Ferrier C, Simon S, Zheng W, Badrinarayanan P, Fennell T, Frick B, Zanotti JM, Alba-Simionesco C. Consequence of excess configurational entropy on fragility: the case of a polymer-oligomer blend. PHYSICAL REVIEW LETTERS 2009; 103:185702. [PMID: 19905814 DOI: 10.1103/physrevlett.103.185702] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Indexed: 05/28/2023]
Abstract
By taking advantage of the molecular weight dependence of the glass transition of polymers and their ability to form perfectly miscible blends, we propose a way to modify the fragility of a system, from fragile to strong, keeping the same glass properties, i.e., vibrational density of states, mean-square displacement, and local structure. Both slow and fast dynamics are investigated by calorimetry and neutron scattering in an athermal polystyrene-oligomer blend, and compared to those of a pure 17-mer polystyrene considered to be a reference, of the same Tg. Whereas the blend and the pure 17-mer have the same heat capacity in the glass and in the liquid, their fragilities differ strongly. Thus, the difference in fragility is related to an extra configurational entropy created by the mixing process and acting at a scale much larger than the interchain distance, without affecting the fast dynamics and the structure of the glass.
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Affiliation(s)
- C Dalle-Ferrier
- Laboratoire de Chimie Physique, UMR 8000, Bâtiment 349, Université, Paris-Sud, 91405 Orsay, France
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32
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Arbe A, Colmenero J. Characterization of the "simple-liquid" state in a polymeric system: coherent and incoherent scattering functions. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:041805. [PMID: 19905331 DOI: 10.1103/physreve.80.041805] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2009] [Indexed: 05/28/2023]
Abstract
By means of time-of-flight neutron scattering, we have characterized the dynamic structure factor and the hydrogen motions of polyethylene above its melting point. As signatures of simple-liquid dynamics, we observe that (i) in the explored dynamic window, the intermediate scattering functions display a single-step decay, without reminiscence of cage effects, and (ii) the structural relaxation as observed at the intermolecular structure factor peak shows a weak temperature dependence, indicating a low degree of interchain cooperativity. However, stretched functional forms are observed for all length scales and temperatures investigated. An apparent direct crossover from the microscopic regime to Rouse-like dynamics suggests an essential role of connectivity in the observed stretching. Finally, while at momentum-transfer values above the structure factor peak the relation between coherent and incoherent characteristic times is reasonably described by the de Gennes narrowing, at larger length scales it is not reproduced by any existing approach.
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Affiliation(s)
- A Arbe
- Centro de Física de Materiales (CSIC-UPV/EHU)-Materials Physics Center, Apartado 1072, 20080 San Sebastián, Spain.
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33
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Zhao J, Ediger MD, Sun Y, Yu L. Two DSC Glass Transitions in Miscible Blends of Polyisoprene/Poly(4-tert-butylstyrene). Macromolecules 2009. [DOI: 10.1021/ma9008516] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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34
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Brodeck M, Alvarez F, Arbe A, Juranyi F, Unruh T, Holderer O, Colmenero J, Richter D. Study of the dynamics of poly(ethylene oxide) by combining molecular dynamic simulations and neutron scattering experiments. J Chem Phys 2009; 130:094908. [DOI: 10.1063/1.3077858] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [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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Tyagi M, Arbe A, Alvarez F, Colmenero J, González MA. Short-range order and collective dynamics of poly(vinyl acetate): A combined study by neutron scattering and molecular dynamics simulations. J Chem Phys 2008; 129:224903. [DOI: 10.1063/1.3028210] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Singla S, Beckham HW. Miscible Blends of Cyclic Poly(oxyethylene) in Linear Polystyrene. Macromolecules 2008. [DOI: 10.1021/ma800327c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Swati Singla
- School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0295
| | - Haskell W. Beckham
- School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0295
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37
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Zhao J, Zhang L, Ediger MD. Poly(ethylene oxide) Dynamics in Blends with Poly(vinyl acetate): Comparison of Segmental and Terminal Dynamics. Macromolecules 2008. [DOI: 10.1021/ma8010526] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junshu Zhao
- Chemistry Department, University of Wisconsin—Madison, 1101 University Ave., Madison, Wisconsin 53706
| | - Liang Zhang
- Chemistry Department, University of Wisconsin—Madison, 1101 University Ave., Madison, Wisconsin 53706
| | - M. D. Ediger
- Chemistry Department, University of Wisconsin—Madison, 1101 University Ave., Madison, Wisconsin 53706
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38
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Genix AC, Arbe A, Arrese-Igor S, Colmenero J, Richter D, Frick B, Deen PP. Neutron scattering investigation of a diluted blend of poly(ethylene oxide) in polyethersulfone. J Chem Phys 2008; 128:184901. [DOI: 10.1063/1.2918497] [Citation(s) in RCA: 13] [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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39
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Zheng W, Simon SL. The glass transition in athermal poly(α-methyl styrene)/oligomer blends. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/polb.21379] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Colmenero J, Arbe A. Segmental dynamics in miscible polymer blends: recent results and open questions. SOFT MATTER 2007; 3:1474-1485. [PMID: 32900101 DOI: 10.1039/b710141d] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
In this short review we summarize the outcome of the large amount of effort made during the past decade from both the experimental and the theoretical point of view in order to understand the effect of blending on the segmental dynamics in polymers. Each of the two families of models proposed-one based on thermally activated concentration fluctuations, the other on chain connectivity effects-account for each of the two main experimental observations: the broadening of the component response with respect to that of the homopolymer and the dynamic heterogeneity, respectively. The complementarity of these approaches, their main achievements and failures, are critically revised. We also include recent results on blends of components with very different mobilities. In the neighbourhood of the glass-transition of the slow polymer, the dynamics of the other component seem to be confined within the frozen chains. We suggest possible ingredients and new routes to be considered in order to elaborate more predictive theoretical frameworks for all these phenomena.
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Affiliation(s)
- J Colmenero
- Centro de Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080, San Sebastián, Spain and Donostia International Physics Center, San Sebastián, Spain.
| | - A Arbe
- Centro de Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080, San Sebastián, Spain
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41
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Tyagi M, Arbe A, Alegría A, Colmenero J, Frick B. Dynamic Confinement Effects in Polymer Blends. A Quasielastic Neutron Scattering Study of the Slow Component in the Blend Poly(vinyl acetate)/Poly(ethylene oxide). Macromolecules 2007. [DOI: 10.1021/ma070539i] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Tyagi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, Centro de Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - A. Arbe
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, Centro de Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - A. Alegría
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, Centro de Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - J. Colmenero
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, Centro de Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - B. Frick
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, Centro de Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue−Langevin, BP 156, 38042 Grenoble Cedex 9, France
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42
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Niedzwiedz K, Wischnewski A, Monkenbusch M, Richter D, Genix AC, Arbe A, Colmenero J, Strauch M, Straube E. Polymer chain dynamics in a random environment: heterogeneous mobilities. PHYSICAL REVIEW LETTERS 2007; 98:168301. [PMID: 17501469 DOI: 10.1103/physrevlett.98.168301] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2006] [Indexed: 05/15/2023]
Abstract
We present a neutron scattering investigation on a miscible blend of two polymers with greatly different glass-transition temperatures Tg. Under such conditions, the nearly frozen high-Tg component imposes a random environment on the mobile chain. The results demand the consideration of a distribution of heterogeneous mobilities in the material and demonstrate that the larger scale dynamics of the fast component is not determined by the average local environment alone. This distribution of mobilities can be mapped quantitatively on the spectrum of local relaxation rates measured at high momentum transfers.
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Affiliation(s)
- K Niedzwiedz
- Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany
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43
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Schwartz GA, Colmenero J, Alegría Á. Single Component Dynamics in Miscible Poly(vinyl methyl ether)/Polystyrene Blends under Hydrostatic Pressure. Macromolecules 2007. [DOI: 10.1021/ma062609b] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gustavo A. Schwartz
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, and Departamento de Física de Materiales UPV/EHU, Centro de Física de Materiales CSIC-UPV/EHU, Facultad de Química, Apartado 1072, 20080 San Sebastián, Spain
| | - Juan Colmenero
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, and Departamento de Física de Materiales UPV/EHU, Centro de Física de Materiales CSIC-UPV/EHU, Facultad de Química, Apartado 1072, 20080 San Sebastián, Spain
| | - Ángel Alegría
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain, and Departamento de Física de Materiales UPV/EHU, Centro de Física de Materiales CSIC-UPV/EHU, Facultad de Química, Apartado 1072, 20080 San Sebastián, Spain
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44
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Cerveny S, Colmenero J, Alegría A. Comment on "Pressure dependence of fragile-to-strong transition and a possible second critical point in supercooled confined water". PHYSICAL REVIEW LETTERS 2006; 97:189802; discussion 189803. [PMID: 17155593 DOI: 10.1103/physrevlett.97.189802] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2005] [Indexed: 05/12/2023]
Affiliation(s)
- Silvina Cerveny
- Donostia International Physics Center P. Manuel de Lardizabal 4 20018, San Sebastián, Spain.
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