1
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Shafqat N, Alegría A, Arbe A, Malicki N, Dronet S, Porcar L, Colmenero J. Disentangling the Calorimetric Glass-Transition Trace in Polymer/Oligomer Mixtures from the Modeling of Dielectric Relaxation and the Input of Small-Angle Neutron Scattering. Macromolecules 2022; 55:7614-7625. [PMID: 36118597 PMCID: PMC9477097 DOI: 10.1021/acs.macromol.2c00609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/05/2022] [Indexed: 11/28/2022]
Abstract
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We have disentangled the contributions to the glass transition
as observed by differential scanning calorimetry (DSC) on simplified
systems of industrial interest consisting of blends of styrene–butadiene
rubber (SBR) and polystyrene (PS) oligomer. To do this, we have started
from a model previously proposed to describe the effects of blending
on the equilibrium dynamics of the α-relaxation as monitored
by broadband dielectric spectroscopy (BDS). This model is based on
the combination of self-concentration and thermally driven concentration
fluctuations (TCFs). Considering the direct insight of small-angle
neutron scattering on TCFs, blending effects on the α-relaxation
can be fully accounted for by using only three free parameters: the
self-concentration of the components φselfSBR and φselfPS) and the relevant length scale of segmental
relaxation, 2Rc. Their values were determined
from the analysis of the BDS results on these samples, being that
obtained for 2Rc ≈ 25Å in
the range usually reported for this magnitude in glass-forming systems.
Using a similar approach, the distinct contributions to the DSC experiments
were evaluated by imposing the dynamical information deduced from
BDS and connecting the component segmental dynamics in the blend above
the glass-transition temperature Tg (at
equilibrium) and the way the equilibrium is lost when cooling toward
the glassy state. This connection was made through the α-relaxation
characteristic time of each component at Tg, τg. The agreement of such constructed curves with
the experimental DSC results is excellent just assuming that τg is not affected by blending.
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Affiliation(s)
- Numera Shafqat
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Manufacture Française des Pneumatiques MICHELIN, Site de Ladoux, 23 Place des Carmes Déchaux, Cedex 63040 Clermont-Ferrand, France
| | - Angel Alegría
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología (UPV/EHU), Facultad de Química, Universidad del Pais Vasco, 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
| | - Nicolas Malicki
- Manufacture Française des Pneumatiques MICHELIN, Site de Ladoux, 23 Place des Carmes Déchaux, Cedex 63040 Clermont-Ferrand, France
| | - Séverin Dronet
- Manufacture Française des Pneumatiques MICHELIN, Site de Ladoux, 23 Place des Carmes Déchaux, Cedex 63040 Clermont-Ferrand, France
| | - Lionel Porcar
- Institut Laue-Langevin, 71 Avenue des Martyrs, Grenoble Cedex 9, 38042, France
| | - Juan Colmenero
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología (UPV/EHU), Facultad de Química, Universidad del Pais Vasco, 20018 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
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Körber T, Krohn F, Neuber C, Schmidt HW, Rössler EA. Reorientational dynamics of highly asymmetric binary non-polymeric mixtures – a dielectric spectroscopy study. Phys Chem Chem Phys 2021; 23:7200-7212. [DOI: 10.1039/d0cp06652d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two separated relaxations α1 and α2 with different temperature dependences are identified in the mixtures. They are attributed to the dynamics associated with the high-Tg (α1) and the low-Tg component (α2) with distinct Tg concentration dependences.
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Affiliation(s)
- Thomas Körber
- Department of Inorganic Chemistry III and Northern Bavarian NMR Centre
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Felix Krohn
- Department of Macromolecular Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Christian Neuber
- Department of Macromolecular Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Hans-Werner Schmidt
- Department of Macromolecular Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Ernst A. Rössler
- Department of Inorganic Chemistry III and Northern Bavarian NMR Centre
- University of Bayreuth
- 95440 Bayreuth
- Germany
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3
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4
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Flämig M, Gabrielyan L, Minikejew R, Markarian S, Rössler EA. Dielectric relaxation and proton field-cycling NMR relaxometry study of dimethyl sulfoxide/glycerol mixtures down to glass-forming temperatures. Phys Chem Chem Phys 2020; 22:9014-9028. [PMID: 32293628 DOI: 10.1039/d0cp00501k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mixtures of glycerol and dimethyl sulfoxide (DMSO) are studied by dielectric spectroscopy (DS) and by 1H field-cycling (FC) NMR relaxometry in the entire concentration range and down to glass-forming temperatures (170-323 K). Molecular dynamics is accessed for 0 < xDMSO ≤ 0.64, at higher concentration phase separation occurs. The FC technique provides the frequency dependence of the spin-lattice relaxation rate which is transformed to the susceptibility representation and thus allows comparing NMR and DS results. The DS spectra virtually do not change with xDMSO and T, only the relaxation times become shorter. This is in contrast to the non-associated mixture toluene/quinaldine for which strong spectral changes occur. The FC relaxation spectra of glycerol in solution with DMSO or (deuterated) DMSO-d6 display a bimodal structure with a high-frequency part reflecting rotational and a low-frequency part reflecting translational dynamics. Regarding the rotational contribution in the glycerol/DMSO-d6 mixtures, no spectral change with xDMSO and T is observed. Yet, the non-deuterated mixture reveals a broader relaxation spectrum. Time constants τrot(T) probed by the two techniques complement each, a range 10-11 s < τ < 10 s is covered. The glass transition temperature Tg(xDMSO) is determined, yielding Tg = 149.5 ± 1 K of pure DMSO by extrapolation. Analysing the low-frequency FC NMR spectra allows to determine the diffusion coefficient Dtrans. Its logarithm shows a linear xDMSO-dependence as does lg τrot. The ratio Dtrans/Drot is independent of xDMSO and its low value indicates large separation of translation and rotation. The corresponding unphysically small hydrodynamic radius indicates strong failure of Stokes-Einstein-Debye relation. Such anomaly is taken as characteristics of a 3d hydrogen-bonded network. We conclude, although DMSO is an aprotic liquid the molecule is continuously incorporated in the hydrogen network of glycerol. Both molecules display common dynamics, i.e., no decoupling of the component dynamics is found in contrast to quinaldine/toluene with a similar Tg difference of its components.
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Affiliation(s)
- Max Flämig
- Nordbayerisches NMR-Zentrum, Universität Bayreuth, 95440 Bayreuth, Germany.
| | - Liana Gabrielyan
- Chair of Physical Chemistry, Yerevan State University, 0025 Yerevan, Armenia
| | - Rafael Minikejew
- Nordbayerisches NMR-Zentrum, Universität Bayreuth, 95440 Bayreuth, Germany.
| | - Shiraz Markarian
- Chair of Physical Chemistry, Yerevan State University, 0025 Yerevan, Armenia
| | - Ernst A Rössler
- Nordbayerisches NMR-Zentrum, Universität Bayreuth, 95440 Bayreuth, Germany.
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5
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Gambino T, Alegría A, Arbe A, Colmenero J, Malicki N, Dronet S, Schnell B, Lohstroh W, Nemkovski K. Applying Polymer Blend Dynamics Concepts to a Simplified Industrial System. A Combined Effort by Dielectric Spectroscopy and Neutron Scattering. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00881] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Gambino
- Centro
de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Manufacture Française
des Pneumatiques MICHELIN, Site de Ladoux, 23 place des Carmes Déchaux, Cedex 9 F-63040, Clermont-Ferrand, France
| | - Angel Alegría
- 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, E-20080 San Sebastián, Spain
| | - Arantxa Arbe
- Centro
de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - Juan 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, E-20080 San Sebastián, Spain
- Donostia International
Physics Center (DIPC), Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain
| | - Nicolas Malicki
- Manufacture Française
des Pneumatiques MICHELIN, Site de Ladoux, 23 place des Carmes Déchaux, Cedex 9 F-63040, Clermont-Ferrand, France
| | - Séverin Dronet
- Manufacture Française
des Pneumatiques MICHELIN, Site de Ladoux, 23 place des Carmes Déchaux, Cedex 9 F-63040, Clermont-Ferrand, France
| | - Benoît Schnell
- Manufacture Française
des Pneumatiques MICHELIN, Site de Ladoux, 23 place des Carmes Déchaux, Cedex 9 F-63040, Clermont-Ferrand, France
| | - Wiebke Lohstroh
- Heinz Maier-Leibnitz Zentrum, Technische Universität München, Lichtenbergstraße 1, D-85748 Garching, Germany
| | - Kirill Nemkovski
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85748 Garching, Germany
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6
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Bierwirth SP, Gainaru C, Böhmer R. Coexistence of two structural relaxation processes in monohydroxy alcohol-alkyl halogen mixtures: Dielectric and rheological studies. J Chem Phys 2018; 149:044509. [PMID: 30068194 DOI: 10.1063/1.5037037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Evidence for the existence of two glass transitions is found in binary mixtures of monohydroxy alcohols with an aprotic alkyl halide by means of dielectric spectroscopy and, markedly, also shear rheology. In the mechanical data, an enormous separation of two components becomes obvious for suitable compositions. The observation of bimodal motional heterogeneity is possible despite the fact that the glass transition temperatures of these substances differ by only 40 K. Obviously, the hydrogen-bond driven formation of supramolecular structures in one of the mixture components facilitates the emergence of dynamic contrast which for other binary liquids was so far only observed in the presence of much larger glass transition temperature differences.
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Affiliation(s)
- S Peter Bierwirth
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - Catalin Gainaru
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - Roland Böhmer
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
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Pötzschner B, Mohamed F, Lichtinger A, Bock D, Rössler EA. Dynamics of asymmetric non-polymeric binary glass formers—A nuclear magnetic resonance and dielectric spectroscopy study. J Chem Phys 2015; 143:154506. [DOI: 10.1063/1.4932981] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- B. Pötzschner
- Experimentalphysik II, Universität Bayreuth, 95440 Bayreuth, Germany
| | - F. Mohamed
- Experimentalphysik II, Universität Bayreuth, 95440 Bayreuth, Germany
| | - A. Lichtinger
- Experimentalphysik II, Universität Bayreuth, 95440 Bayreuth, Germany
| | - D. Bock
- Experimentalphysik II, Universität Bayreuth, 95440 Bayreuth, Germany
| | - E. A. Rössler
- Experimentalphysik II, Universität Bayreuth, 95440 Bayreuth, Germany
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8
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Goracci G, Arbe A, Alegría A, Lohstroh W, Su Y, Colmenero J. Dynamics of tetrahydrofuran as minority component in a mixture with poly(2-(dimethylamino)ethyl methacrylate): A neutron scattering and dielectric spectroscopy investigation. J Chem Phys 2015; 143:094505. [PMID: 26342375 DOI: 10.1063/1.4929906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have investigated a mixture of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and tetrahydrofuran (THF) (70 wt. % PDMAEMA/30 wt. % THF) by combining dielectric spectroscopy and quasielastic neutron scattering (QENS) on a labelled sample, focusing on the dynamics of the THF molecules. Two independent processes have been identified. The "fast" one has been qualified as due to an internal motion of the THF ring leading to hydrogen displacements of about 3 Å with rather broadly distributed activation energies. The "slow" process is characterized by an Arrhenius-like temperature dependence of the characteristic time which persists over more than 9 orders of magnitude in time. The QENS results evidence the confined nature of this process, determining a size of about 8 Å for the volume within which THF hydrogens' motions are restricted. In a complementary way, we have also investigated the structural features of the sample. This study suggests that THF molecules are well dispersed among side-groups nano-domains in the polymer matrix, ruling out a significant presence of clusters of solvent. Such a good dispersion, together with a rich mobility of the local environment, would prevent cooperativity effects to develop for the structural relaxation of solvent molecules, frustrating thereby the emergence of Vogel-Fulcher-like behavior, at least in the whole temperature interval investigated.
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Affiliation(s)
- G Goracci
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - A Arbe
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - A Alegría
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - W Lohstroh
- Heinz Maier-Leibnitz Zentrum, Technische Universität München, Lichtenbergstraße 1, D-85748 Garching, Germany
| | - Y Su
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstraße 1, 85747 Garching, Germany
| | - J Colmenero
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
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9
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10
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Cangialosi D. Dynamics and thermodynamics of polymer glasses. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:153101. [PMID: 24675099 DOI: 10.1088/0953-8984/26/15/153101] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The fate of matter when decreasing the temperature at constant pressure is that of passing from gas to liquid and, subsequently, from liquid to crystal. However, a class of materials can exist in an amorphous phase below the melting temperature. On cooling such materials, a glass is formed; that is, a material with the rigidity of a solid but exhibiting no long-range order. The study of the thermodynamics and dynamics of glass-forming systems is the subject of continuous research. Within the wide variety of glass formers, an important sub-class is represented by glass forming polymers. The presence of chain connectivity and, in some cases, conformational disorder are unfavourable factors from the point of view of crystallization. Furthermore, many of them, such as amorphous thermoplastics, thermosets and rubbers, are widely employed in many applications. In this review, the peculiarities of the thermodynamics and dynamics of glass-forming polymers are discussed, with particular emphasis on those topics currently the subject of debate. In particular, the following aspects will be reviewed in the present work: (i) the connection between the pronounced slowing down of glassy dynamics on cooling towards the glass transition temperature (Tg) and the thermodynamics; and, (ii) the fate of the dynamics and thermodynamics below Tg. Both aspects are reviewed in light of the possible presence of a singularity at a finite temperature with diverging relaxation time and zero configurational entropy. In this context, the specificity of glass-forming polymers is emphasized.
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Affiliation(s)
- D Cangialosi
- Materials Physics Center, Paseo Manuel de Lardizabel 5 20018 San Sebastian, Spain
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11
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Bock D, Kahlau R, Pötzschner B, Körber T, Wagner E, Rössler EA. Dynamics of asymmetric binary glass formers. II. Results from nuclear magnetic resonance spectroscopy. J Chem Phys 2014; 140:094505. [DOI: 10.1063/1.4865945] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Kahlau R, Bock D, Schmidtke B, Rössler EA. Dynamics of asymmetric binary glass formers. I. A dielectric and nuclear magnetic resonance spectroscopy study. J Chem Phys 2014; 140:044509. [DOI: 10.1063/1.4861428] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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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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14
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Blochowicz T, Lusceac SA, Gutfreund P, Schramm S, Stühn B. Two Glass Transitions and Secondary Relaxations of Methyltetrahydrofuran in a Binary Mixture. J Phys Chem B 2011; 115:1623-37. [DOI: 10.1021/jp110506z] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- T. Blochowicz
- Institut für Festkörperphysik, TU-Darmstadt, 64289 Darmstadt, Germany
| | - S. A. Lusceac
- Institut für Festkörperphysik, TU-Darmstadt, 64289 Darmstadt, Germany
| | - P. Gutfreund
- Institut Laue-Langevin, 38042 Grenoble Cedex, France
| | - S. Schramm
- Institut für Festkörperphysik, TU-Darmstadt, 64289 Darmstadt, Germany
| | - B. Stühn
- Institut für Festkörperphysik, TU-Darmstadt, 64289 Darmstadt, Germany
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15
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Mok MM, Liu X, Bai Z, Lei Y, Lodge TP. Effect of Concentration on the Glass Transition and Viscoelastic Properties of Poly(methyl methacrylate)/Ionic Liquid Solutions. Macromolecules 2011. [DOI: 10.1021/ma102503j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Timothy P. Lodge
- Department of Chemistry
- Department of Chemical Engineering & Materials Science
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16
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Arrese-Igor S, Alegría A, Colmenero J. Comparison of Calorimetric and Dielectric Single Component Glass Transitions in PtBS−PI Blends. Macromolecules 2010. [DOI: 10.1021/ma101022a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Arrese-Igor
- Centro de Física de Materiales (CSIC−UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - A. Alegría
- Centro de Física de Materiales (CSIC−UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
| | - J. Colmenero
- Centro de Física de Materiales (CSIC−UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
- Materials Physics Center (MPC), and Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
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17
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Schramm S, Blochowicz T, Gouirand E, Wipf R, Stühn B, Chushkin Y. Concentration fluctuations in a binary glass former investigated by x-ray photon correlation spectroscopy. J Chem Phys 2010; 132:224505. [DOI: 10.1063/1.3431537] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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18
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Wang LM, Tian Y, Liu R, Richert R. Structural Relaxation Dynamics in Binary Glass-Forming Molecular Liquids with Ideal and Complex Mixing Behavior. J Phys Chem B 2010; 114:3618-22. [DOI: 10.1021/jp912223j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li-Min Wang
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004 China and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
| | - Yongjun Tian
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004 China and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
| | - Riping Liu
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004 China and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
| | - Ranko Richert
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004 China and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
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19
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Lund R, Plaza-García S, Alegría A, Colmenero J, Janoski J, Chowdhury SR, Quirk RP. Polymer Dynamics of Well-Defined, Chain-End-Functionalized Polystyrenes by Dielectric Spectroscopy. Macromolecules 2009. [DOI: 10.1021/ma901617u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Reidar Lund
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Sandra Plaza-García
- 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), Apartado 1072, 20080 San Sebastián, Spain
| | - Angel Alegría
- Centro de Física de Materiales (CSIC-UPV/EHU), Materials Physics Center (MPC), Apartado 1072, 20080 San Sebastián, Spain
- Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Paseo Manuel de Lardizabal 4, 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), Materials Physics Center (MPC), Apartado 1072, 20080 San Sebastián, Spain
- Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Jonathan Janoski
- Institute of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909
| | - Sumana Roy Chowdhury
- Institute of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909
| | - Roderic P. Quirk
- Institute of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909
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Cangialosi D, Alegría A, Colmenero J. Dynamical heterogeneity in binary mixtures of low-molecular-weight glass formers. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:041505. [PMID: 19905314 DOI: 10.1103/physreve.80.041505] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Indexed: 05/28/2023]
Abstract
Homogeneous diethyl phthalate/phenylphthalein-dimethylether (DEP/PDE) mixtures have been investigated by means of broadband dielectric spectroscopy. Contrarily to the widespread view that homogenous binary mixtures should give rise to a single glass transition, the mixture displays two dynamics giving rise to two glass transitions. Such a finding can be rationalized invoking the self-concentration concept that relies on the localized nature of the glass transition phenomenon. In such a way, the analogy with miscible polymer blends, for which this concept has been introduced, is highlighted. A model based on the combination of the Adam-Gibbs (AG) theory of the glass transition and the self-concentration concept resulted to be fully predictive once the only unknown variable, namely, the glass-former specific parameter (alpha) connecting the characteristic length for the glass transition to the configurational entropy, is extracted applying the model itself to DEP/toluene and DEP/PDE solutions highly concentrated, respectively, in DEP and PDE. The alpha parameter obtained in such a way allows the precise determination of the most probable relaxation time even for those DEP/PDE mixtures displaying a strong overlap of the dielectric response. The model incorporating the self-concentration concept to the AG theory also provides the characteristic length scale for the glass transition for both DEP and PDE. Such a length scale was found to be on the order of 1-2 nm. This is comparable to that obtained for other glass formers.
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Affiliation(s)
- Daniele Cangialosi
- Centrol de Fisica de Materiales CFM (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
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Cangialosi D, Alegría A, Colmenero J. Dielectric relaxation of polychlorinated biphenyl/toluene mixtures: Component dynamics. J Chem Phys 2008; 128:224508. [DOI: 10.1063/1.2937449] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cangialosi D, Alegría A, Colmenero J. Miscible Polymer Blends with Large Dynamical Asymmetry: A New Class of Solid-State Electrolytes? Macromolecules 2008. [DOI: 10.1021/ma071679v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniele Cangialosi
- Centro de Física de Materiales CSIC-UPV/EHU, Edificio Korta, 20018 San Sebastián, Spain, Departamento de Física de Materiales, Facultad de Química, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, and Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Angel Alegría
- Centro de Física de Materiales CSIC-UPV/EHU, Edificio Korta, 20018 San Sebastián, Spain, Departamento de Física de Materiales, Facultad de Química, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, and Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Juan Colmenero
- Centro de Física de Materiales CSIC-UPV/EHU, Edificio Korta, 20018 San Sebastián, Spain, Departamento de Física de Materiales, Facultad de Química, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, and Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
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Cangialosi D, Alegría A, Colmenero J. Route to calculate the length scale for the glass transition in polymers. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:011514. [PMID: 17677457 DOI: 10.1103/physreve.76.011514] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2006] [Indexed: 05/16/2023]
Abstract
The occurrence of glass transition is believed to be associated to cooperative motion with a growing length scale with decreasing temperature. We provide a route to calculate the size of cooperatively rearranging regions (CRR) of glass-forming polymers combining the Adam-Gibbs theory of the glass transition with the self-concentration concept. To do so we explore the dynamics of glass-forming polymers in different environments. The material specific parameter alpha connecting the size of the CRR to the configurational entropy is obtained in this way. Thereby, the size of CRR can be precisely quantified in absolute values. This size results to be in the range 1-3nm at the glass transition temperature depending on the glass-forming polymer.
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Affiliation(s)
- D Cangialosi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain.
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