1
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Ghanekarade A, Simmons DS. Glass formation and dynamics of model polymer films with one versus two active interfaces. SOFT MATTER 2023; 19:8413-8422. [PMID: 37877245 DOI: 10.1039/d3sm00719g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Polymers and other glass-forming liquids can exhibit profound alterations in dynamics in the nanoscale vicinity of interfaces, over a range appreciably exceeding that of typical interfacial thermodynamic gradients. The understanding of these dynamical gradients is particularly complicated in systems with internal or external nanoscale dimensions, where a gradient nucleated at one interface can impinge on a second, potentially distinct, interface. To better understand the interactions that govern system dynamics and glass formation in these cases, here we simulate the baseline case of a glass-forming polymer film, over a wide range of thickness, supported on a dynamically neutral substrate that has little effect on nearby dynamics. We compare these results to our prior simulations of freestanding films. Results indicate that dynamical gradients in our simulated systems, as measured based upon translational relaxation, are simply truncated when they impinge on a secondary surface that is locally dynamically neutral. Altered film behavior can be described almost entirely by gradient effects down to the thinnest films probed, with no evidence for finite-size effects sometimes posited to play a role in these systems. Finally, our simulations predict that linear gradient overlap effects in the presence of symmetric dynamically active interfaces yield a non-monotonic variation of the whole free standing film stretching exponent (relaxation time distribution breadth). The maximum relaxation time distribution breadth in simulation is found at a film thickness of 4-5 times the interfacial gradient range. Observation of this maximum in experiment would provide an important validation that the gradient behavior observed in simulation persists to experimental timescales. If validated, observation of this maximum would potentially also enable determination of the dynamic gradient range from experimental mean-film measurements of film dynamics.
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Affiliation(s)
- Asieh Ghanekarade
- Department of Chemical, Biological, and Materials Engineering, The University of South Florida, Tampa, Florida, USA.
| | - David S Simmons
- Department of Chemical, Biological, and Materials Engineering, The University of South Florida, Tampa, Florida, USA.
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2
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Ghanekarade A, Simmons DS. Combined Mixing and Dynamical Origins of Tg Alterations Near Polymer–Polymer Interfaces. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Asieh Ghanekarade
- Department of Chemical, Biological, and Materials Engineering, University of South Florida, Tampa, Florida33544, United States
| | - David S. Simmons
- Department of Chemical, Biological, and Materials Engineering, University of South Florida, Tampa, Florida33544, United States
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3
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Drayer WF, Simmons DS. Sequence Effects on the Glass Transition of a Model Copolymer System. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00664] [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)
- William F. Drayer
- Department of Chemical, Biological, and Materials Engineering, University of South Florida, Tampa, Florida 33620, United States
| | - David S. Simmons
- Department of Chemical, Biological, and Materials Engineering, University of South Florida, Tampa, Florida 33620, United States
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4
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Ghanekarade A, Phan AD, Schweizer KS, Simmons DS. Nature of dynamic gradients, glass formation, and collective effects in ultrathin freestanding films. Proc Natl Acad Sci U S A 2021; 118:e2104398118. [PMID: 34326262 PMCID: PMC8346796 DOI: 10.1073/pnas.2104398118] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Molecular, polymeric, colloidal, and other classes of liquids can exhibit very large, spatially heterogeneous alterations of their dynamics and glass transition temperature when confined to nanoscale domains. Considerable progress has been made in understanding the related problem of near-interface relaxation and diffusion in thick films. However, the origin of "nanoconfinement effects" on the glassy dynamics of thin films, where gradients from different interfaces interact and genuine collective finite size effects may emerge, remains a longstanding open question. Here, we combine molecular dynamics simulations, probing 5 decades of relaxation, and the Elastically Cooperative Nonlinear Langevin Equation (ECNLE) theory, addressing 14 decades in timescale, to establish a microscopic and mechanistic understanding of the key features of altered dynamics in freestanding films spanning the full range from ultrathin to thick films. Simulations and theory are in qualitative and near-quantitative agreement without use of any adjustable parameters. For films of intermediate thickness, the dynamical behavior is well predicted to leading order using a simple linear superposition of thick-film exponential barrier gradients, including a remarkable suppression and flattening of various dynamical gradients in thin films. However, in sufficiently thin films the superposition approximation breaks down due to the emergence of genuine finite size confinement effects. ECNLE theory extended to treat thin films captures the phenomenology found in simulation, without invocation of any critical-like phenomena, on the basis of interface-nucleated gradients of local caging constraints, combined with interfacial and finite size-induced alterations of the collective elastic component of the structural relaxation process.
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Affiliation(s)
- Asieh Ghanekarade
- Department of Chemical, Biological and Materials Engineering, University of South Florida, Tampa, FL 33620
| | - Anh D Phan
- Faculty of Materials Science and Engineering, Phenikaa University, Hanoi 12116, Vietnam;
| | - Kenneth S Schweizer
- Department of Materials Science, University of Illinois, Urbana, IL 61801;
- Department of Chemistry, University of Illinois, Urbana, IL 61801
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL 61801
| | - David S Simmons
- Department of Chemical, Biological and Materials Engineering, University of South Florida, Tampa, FL 33620;
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5
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Rahman T, Simmons DS. Near-Substrate Gradients in Chain Relaxation and Viscosity in a Model Low-Molecular Weight Polymer. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tamanna Rahman
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - David S. Simmons
- Department of Chemical, Biological, and Materials Engineering, University of South Florida, Tampa, Florida 33620, United States
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6
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Diaz Vela D, Ghanekarade A, Simmons DS. Probing the Metrology and Chemistry Dependences of the Onset Condition of Strong “Nanoconfinement” Effects on Dynamics. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02693] [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)
- Daniel Diaz Vela
- Department of Chemical and Biomedical Engineering, The University of South Florida, Tampa, Florida 33620, United States
| | - Asieh Ghanekarade
- Department of Chemical and Biomedical Engineering, The University of South Florida, Tampa, Florida 33620, United States
| | - David S. Simmons
- Department of Chemical and Biomedical Engineering, The University of South Florida, Tampa, Florida 33620, United States
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7
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Schweizer KS, Simmons DS. Progress towards a phenomenological picture and theoretical understanding of glassy dynamics and vitrification near interfaces and under nanoconfinement. J Chem Phys 2019; 151:240901. [PMID: 31893888 DOI: 10.1063/1.5129405] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The nature of alterations to dynamics and vitrification in the nanoscale vicinity of interfaces-commonly referred to as "nanoconfinement" effects on the glass transition-has been an open question for a quarter century. We first analyze experimental and simulation results over the last decade to construct an overall phenomenological picture. Key features include the following: after a metrology- and chemistry-dependent onset, near-interface relaxation times obey a fractional power law decoupling relation with bulk relaxation; relaxation times vary in a double-exponential manner with distance from the interface, with an intrinsic dynamical length scale appearing to saturate at low temperatures; the activation barrier and vitrification temperature Tg approach bulk behavior in a spatially exponential manner; and all these behaviors depend quantitatively on the nature of the interface. We demonstrate that the thickness dependence of film-averaged Tg for individual systems provides a poor basis for discrimination between different theories, and thus we assess their merits based on the above dynamical gradient properties. Entropy-based theories appear to exhibit significant inconsistencies with the phenomenology. Diverse free-volume-motivated theories vary in their agreement with observations, with approaches invoking cooperative motion exhibiting the most promise. The elastically cooperative nonlinear Langevin equation theory appears to capture the largest portion of the phenomenology, although important aspects remain to be addressed. A full theoretical understanding requires improved confrontation with simulations and experiments that probe spatially heterogeneous dynamics within the accessible 1-ps to 1-year time window, minimal use of adjustable parameters, and recognition of the rich quantitative dependence on chemistry and interface.
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Affiliation(s)
- Kenneth S Schweizer
- Departments of Materials Science, Chemistry and Chemical & Biomolecular Engineering, Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA
| | - David S Simmons
- Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33620, USA
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8
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Seo Y, Shen KH, Brown JR, Hall LM. Role of Solvation on Diffusion of Ions in Diblock Copolymers: Understanding the Molecular Weight Effect through Modeling. J Am Chem Soc 2019; 141:18455-18466. [PMID: 31674178 DOI: 10.1021/jacs.9b07227] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Youngmi Seo
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Kuan-Hsuan Shen
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Jonathan R. Brown
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Lisa M. Hall
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
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9
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Diaz-Vela D, Hung JH, Simmons DS. Temperature-Independent Rescaling of the Local Activation Barrier Drives Free Surface Nanoconfinement Effects on Segmental-Scale Translational Dynamics near Tg. ACS Macro Lett 2018; 7:1295-1301. [PMID: 35651251 DOI: 10.1021/acsmacrolett.8b00695] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Near-interface alterations in dynamics and glass formation behavior have been the subject of extensive study for the past two decades, both because of their practical importance and in the hope of revealing underlying correlation lengths underpinning glass transition more generally. Here we employ molecular dynamics simulations of thick films to demonstrate that these effects emerge, for segmental-scale translational dynamics at low temperature, from a temperature-independent rescaling of the local activation barrier. This rescaling manifests as a fractional power law decoupling relationship of local dynamics relative to the bulk, with a transition from a regime of weak decoupling at high temperatures to a regime of strong decoupling at low temperatures. The range of this effect saturates at low temperatures, with 90% of the surface perturbation in the barrier lost over a range of 12 segmental diameters. These findings reduce the phenomenology of Tg nanoconfinement effects to two properties-a position-dependent, temperature independent, barrier rescaling factor and an onset time scale-while substantially constraining the predictions required from any theoretical explanation of this phenomenon.
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Affiliation(s)
- Daniel Diaz-Vela
- The University of Akron, 250 South Forge Street, Akron, Ohio 44325, United States
| | - Jui-Hsiang Hung
- The University of Akron, 250 South Forge Street, Akron, Ohio 44325, United States
| | - David S. Simmons
- The University of South Florida, 4202 East Fowler Avenue, ENB 118, Tampa, Florida 33620, United States
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10
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Cheng Y, Yang J, Hung JH, Patra TK, Simmons DS. Design Rules for Highly Conductive Polymeric Ionic Liquids from Molecular Dynamics Simulations. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00572] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yizi Cheng
- Department of Polymer Engineering, University of Akron, 250 South Forge St., Akron, Ohio 44325, United States
| | - Junhong Yang
- Department of Polymer Engineering, University of Akron, 250 South Forge St., Akron, Ohio 44325, United States
| | - Jui-Hsiang Hung
- Department of Polymer Engineering, University of Akron, 250 South Forge St., Akron, Ohio 44325, United States
| | - Tarak K. Patra
- Department of Polymer Engineering, University of Akron, 250 South Forge St., Akron, Ohio 44325, United States
| | - David S. Simmons
- Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33612, United States
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11
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Pestryaev EM. Oscillating Free Induction Decay in Polymer Systems: Theoretical Analysis. POLYMER SCIENCE SERIES A 2018. [DOI: 10.1134/s0965545x18040090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Mangalara JH, Mackura ME, Marvin MD, Simmons DS. The relationship between dynamic and pseudo-thermodynamic measures of the glass transition temperature in nanostructured materials. J Chem Phys 2017; 146:203316. [DOI: 10.1063/1.4977520] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Jayachandra Hari Mangalara
- Department of Polymer Engineering, The University of Akron, 250 South Forge St, Akron, Ohio, 44325-0301 USA
| | - Mark E. Mackura
- Department of Polymer Engineering, The University of Akron, 250 South Forge St, Akron, Ohio, 44325-0301 USA
| | - Michael D. Marvin
- Department of Polymer Engineering, The University of Akron, 250 South Forge St, Akron, Ohio, 44325-0301 USA
| | - David S. Simmons
- Department of Polymer Engineering, The University of Akron, 250 South Forge St, Akron, Ohio, 44325-0301 USA
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13
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Alegria A, Colmenero J. Dielectric relaxation of polymers: segmental dynamics under structural constraints. SOFT MATTER 2016; 12:7709-25. [PMID: 27560167 DOI: 10.1039/c6sm01298a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
In this article we review the recent polymer literature where dielectric spectroscopy has been used to investigate the segmental dynamics of polymers under the constraints produced by self-structuring. Specifically, we consider three cases: (i) semicrystalline polymers, (ii) segregated block-copolymers, and (iii) asymmetric miscible polymer blends. In these three situations the characteristics of the dielectric relaxation associated with the polymer segmental dynamics are markedly affected by the constraints imposed by the corresponding structural features. After reviewing in detail each of the polymer systems, the most common aspects are discussed in the context of the use of dielectric relaxation as a sensitive tool for analyzing structural features in nanostructured polymer systems.
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Affiliation(s)
- Angel Alegria
- Centro de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain.
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14
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Merling WL, Mileski JB, Douglas JF, Simmons DS. The Glass Transition of a Single Macromolecule. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01461] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Weston L. Merling
- Department
of Polymer Engineering, The University of Akron, 250 South Forge
St., Akron, Ohio 44325-0301, United States
| | - Johnathon B. Mileski
- Department
of Polymer Engineering, The University of Akron, 250 South Forge
St., Akron, Ohio 44325-0301, United States
| | - Jack F. Douglas
- Materials
Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - David S. Simmons
- Department
of Polymer Engineering, The University of Akron, 250 South Forge
St., Akron, Ohio 44325-0301, United States
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15
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Mangalara JH, Marvin MD, Simmons DS. Three-Layer Model for the Emergence of Ultrastable Glasses from the Surfaces of Supercooled Liquids. J Phys Chem B 2016; 120:4861-5. [DOI: 10.1021/acs.jpcb.6b04736] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jayachandra Hari Mangalara
- Department
of Polymer Engineering, The University of Akron, 250 South Forge
Street, Akron, Ohio 44325-0301, United States
| | - Michael D. Marvin
- Department
of Polymer Engineering, The University of Akron, 250 South Forge
Street, Akron, Ohio 44325-0301, United States
| | - David S. Simmons
- Department
of Polymer Engineering, The University of Akron, 250 South Forge
Street, Akron, Ohio 44325-0301, United States
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16
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Sethuraman V, Pryamitsyn V, Ganesan V. Normal Modes and Dielectric Spectra of Diblock Copolymers in Lamellar Phases. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vaidyanathan Sethuraman
- Department
of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Victor Pryamitsyn
- Department
of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Venkat Ganesan
- Department
of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
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17
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Sethuraman V, Pryamitsyn V, Ganesan V. Influence of molecular weight and degree of segregation on local segmental dynamics of ordered block copolymers. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.23985] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Victor Pryamitsyn
- Department of Chemical Engineering; University of Texas at Austin; Austin Texas 78712
| | - Venkat Ganesan
- Department of Chemical Engineering; University of Texas at Austin; Austin Texas 78712
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18
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Affiliation(s)
- David S. Simmons
- Department of Polymer Engineering; University of Akron; 250 South Forge St Akron OH 44325 USA
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19
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Ruan D, Simmons DS. Roles of chain stiffness and segmental rattling in ionomer glass formation. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23788] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dihui Ruan
- Department of Polymer Engineering, Polymer Engineering Academic Center; The University of Akron; 250 South Forge Street Akron Ohio 44325-0301
| | - David S. Simmons
- Department of Polymer Engineering, Polymer Engineering Academic Center; The University of Akron; 250 South Forge Street Akron Ohio 44325-0301
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20
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Lang RJ, Merling WL, Simmons DS. Combined Dependence of Nanoconfined Tg on Interfacial Energy and Softness of Confinement. ACS Macro Lett 2014; 3:758-762. [PMID: 35590695 DOI: 10.1021/mz500361v] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We employ molecular dynamics simulations of nanolayered polymers to systematically quantify the dependence of Tg nanoconfinement effects on interfacial energy and the "softness" of confinement. Results indicate that nanoconfined Tg depends linearly on interfacial adhesion energy, with a slope that scales exponentially with the ratio of the bulk Debye-Waller factors ⟨u2⟩ of the confined and confining materials. These trends, together with a convergence at low interfacial adhesion energy to the Tg of an equivalent freestanding film, are captured in a single functional form, with only three parameters explicitly referring to the confined state. The observed dependence on ⟨u2⟩ indicates that softness of nanoconfinement should be defined in terms of the relative high frequency shear moduli, rather than low frequency moduli or relaxation times, of the confined and confining materials.
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Affiliation(s)
- Ryan J. Lang
- Department of Polymer Engineering, The University of Akron, 250 South Forge Street, Akron, Ohio 44325-0301, United States
| | - Weston L. Merling
- Department of Polymer Engineering, The University of Akron, 250 South Forge Street, Akron, Ohio 44325-0301, United States
| | - David S. Simmons
- Department of Polymer Engineering, The University of Akron, 250 South Forge Street, Akron, Ohio 44325-0301, United States
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21
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Lorthioir C, Deloche B. Heterogeneous behavior of free chain-ends in a lamellar diblock copolymer: segmental dynamics and ordering, as probed by 2H solid-state NMR. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3270-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Lorthioir C, Randriamahefa S, Deloche B. Some aspects of the orientational order distribution of flexible chains in a diblock mesophase. J Chem Phys 2013; 139:224903. [DOI: 10.1063/1.4838375] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Lang RJ, Simmons DS. Interfacial Dynamic Length Scales in the Glass Transition of a Model Freestanding Polymer Film and Their Connection to Cooperative Motion. Macromolecules 2013. [DOI: 10.1021/ma401525q] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryan J. Lang
- Department of Polymer Engineering, The University of Akron, 250 South Forge St., Akron, Ohio 44325-0301, United States
| | - David S. Simmons
- Department of Polymer Engineering, The University of Akron, 250 South Forge St., Akron, Ohio 44325-0301, United States
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24
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Lund R, Barroso-Bujans F, Slimani MZ, Moreno AJ, Willner L, Richter D, Alegría A, Colmenero J. End-to-End Vector Dynamics of Nonentangled Polymers in Lamellar Block Copolymer Melts: The Role of Junction Point Motion. Macromolecules 2013. [DOI: 10.1021/ma401162b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Reidar Lund
- Department
of Chemistry, University of Oslo, Postboks 1033 Blindern, 0315 Oslo, Norway
| | - Fabienne Barroso-Bujans
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | | | - Angel J. Moreno
- Centro de Fı́sica de Materiales (CSIC, UPV/EHU) and Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Lutz Willner
- Juelich
Centre for Neutron Science (JCNS) and Institute for Complex Systems
(ICS), Forschungszentrum Juelich GmbH, 52425 Juelich, Germany
| | - Dieter Richter
- Juelich
Centre for Neutron Science (JCNS) and Institute for Complex Systems
(ICS), Forschungszentrum Juelich GmbH, 52425 Juelich, Germany
| | - Angel Alegría
- Centro de Fı́sica de Materiales (CSIC, UPV/EHU) and Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento
de Fı́sica de Materiales, Universidad del Paı́s Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - Juan Colmenero
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
- Centro de Fı́sica de Materiales (CSIC, UPV/EHU) and Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento
de Fı́sica de Materiales, Universidad del Paı́s Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
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25
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Yang H, Chen XC, Jun GR, Green PF. Segmental Dynamics of Chains Tethered at Interfaces of Varying Curvatures. Macromolecules 2013. [DOI: 10.1021/ma400098u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hengxi Yang
- Department
of Physics, The University of Michigan,
Ann Arbor, Michigan 48109,
United States
| | - X. Chelsea Chen
- Department
of Materials Science
and Engineering, The University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ga Ram Jun
- Department
of Materials Science
and Engineering, The University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Peter F. Green
- Department
of Materials Science
and Engineering, The University of Michigan, Ann Arbor, Michigan 48109, United States
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26
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Slimani MZ, Moreno AJ, Rossi G, Colmenero J. Dynamic Heterogeneity in Random and Gradient Copolymers: A Computational Investigation. Macromolecules 2013. [DOI: 10.1021/ma400577d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Angel J. Moreno
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Giulia Rossi
- INSERM UMR-S 665, DSIMB 6, rue Alexandre Cabanel, 75739 Paris Cedex 15, France
| | - Juan Colmenero
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018
San Sebastián, Spain
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Física
de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
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27
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Slimani MZ, Moreno AJ, Colmenero J. Heterogeneity of the Segmental Dynamics in Cylindrical and Spherical Phases of Diblock Copolymers. Macromolecules 2012. [DOI: 10.1021/ma301388j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Angel J. Moreno
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Juan Colmenero
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018
San Sebastián, Spain
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Física
de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
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28
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Meins T, Dingenouts N, Kübel J, Wilhelm M. In Situ Rheodielectric, ex Situ 2D-SAXS, and Fourier Transform Rheology Investigations of the Shear-Induced Alignment of Poly(styrene-b-1,4-isoprene) Diblock Copolymer Melts. Macromolecules 2012. [DOI: 10.1021/ma300124b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- T. Meins
- Institute for Chemical
Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
| | - N. Dingenouts
- Institute for Chemical
Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
| | - J. Kübel
- Institute for Chemical
Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
| | - M. Wilhelm
- Institute for Chemical
Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
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29
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del Valle-Carrandi L, Alegría A, Arbe A, Colmenero J. Unexpected PDMS Behavior in Segregated Cylindrical and Spherical Nanophases of PS–PDMS Asymmetric Diblock Copolymers. Macromolecules 2011. [DOI: 10.1021/ma202107m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lourdes del Valle-Carrandi
- Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado
1072, 20080 San Sebastián, Spain
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC-UPV/EHU), Paseo
Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Angel Alegría
- Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado
1072, 20080 San Sebastián, Spain
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC-UPV/EHU), Paseo
Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Arantxa Arbe
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC-UPV/EHU), Paseo
Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Juan Colmenero
- Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado
1072, 20080 San Sebastián, Spain
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC-UPV/EHU), Paseo
Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018
San Sebastián, Spain
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