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Kölbel J, Ruggiero MT, Keren S, Benshalom N, Yaffe O, Zeitler JA, Mittleman DM. Is Ortho-Terphenyl a Rigid Glass Former? J Phys Chem Lett 2024; 15:7020-7027. [PMID: 38949623 PMCID: PMC11247491 DOI: 10.1021/acs.jpclett.4c01217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/25/2024] [Accepted: 06/25/2024] [Indexed: 07/02/2024]
Abstract
Ortho-terphenyl (OTP) has long been used as a model system to study the glass transition due to its apparent simplicity and a widespread assumption that it is a rigid molecule. Here, we employ terahertz time-domain spectroscopy and low-frequency Raman spectroscopy to investigate the rigidity of OTP by direct observation of the low-frequency vibrational dynamics. These terahertz phonons involve complex large-amplitude atomic motions where intramolecular and intermolecular displacements are often mixed. Comparison of experimental results with density functional theory and ab initio molecular dynamics simulations shows that the assumption of rigidity neglects important implications for the glass transition and must be revisited. These results highlight the significance of terahertz modes on elasticity, which will be even more critical in more complex systems such as biomolecules.
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Affiliation(s)
- Johanna Kölbel
- School
of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Michael T. Ruggiero
- Department
of Chemistry, University of Rochester, Rochester, New York, 14627, United
States
| | - Shachar Keren
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 7610001, Israel
| | - Nimrod Benshalom
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 7610001, Israel
| | - Omer Yaffe
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 7610001, Israel
| | - J. Axel Zeitler
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, U.K.
| | - Daniel M. Mittleman
- School
of Engineering, Brown University, Providence, Rhode Island 02912, United States
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2
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Xia W, Song J, Hansoge NK, Phelan FR, Keten S, Douglas JF. Energy Renormalization for Coarse-Graining the Dynamics of a Model Glass-Forming Liquid. J Phys Chem B 2018; 122:2040-2045. [PMID: 29400063 PMCID: PMC6217959 DOI: 10.1021/acs.jpcb.8b00321] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Coarse-grained modeling achieves the enhanced computational efficiency required to model glass-forming materials by integrating out "unessential" molecular degrees of freedom, but no effective temperature transferable coarse-graining method currently exists to capture dynamics. We address this fundamental problem through an energy-renormalization scheme, in conjunction with the localization model of relaxation relating the Debye-Waller factor ⟨u2⟩ to the structural relaxation time τ. Taking ortho-terphenyl as a model small-molecule glass-forming liquid, we show that preserving ⟨u2⟩ (at picosecond time scale) under coarse-graining by renormalizing the cohesive interaction strength allows for quantitative prediction of both short- and long-time dynamics covering the entire temperature range of glass formation. Our findings provide physical insights into the dynamics of cooled liquids and make progress for building temperature-transferable coarse-grained models that predict key properties of glass-forming materials.
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Affiliation(s)
- Wenjie Xia
- Materials Science & Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Center for Hierarchical Materials Design, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
- Department of Civil & Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
| | - Jake Song
- Department of Materials Science & Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
| | - Nitin K. Hansoge
- Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
| | - Frederick R. Phelan
- Materials Science & Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Sinan Keten
- Department of Civil & Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
- Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
| | - Jack F. Douglas
- Materials Science & Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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3
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Quasielastic neutron scattering evidence of coupling of caged molecule dynamics to JG β-relaxation. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Ruggiero MT, Krynski M, Kissi EO, Sibik J, Markl D, Tan NY, Arslanov D, van der Zande W, Redlich B, Korter TM, Grohganz H, Löbmann K, Rades T, Elliott SR, Zeitler JA. The significance of the amorphous potential energy landscape for dictating glassy dynamics and driving solid-state crystallisation. Phys Chem Chem Phys 2017; 19:30039-30047. [DOI: 10.1039/c7cp06664c] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We show clear evidence for a theory proposing that the shape and structure of the PES is the fundamental factor underlying the dynamics at temperatures below the glass transition.
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5
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Ngai KL, Capaccioli S, Prevosto D, Wang LM. Coupling of Caged Molecule Dynamics to JG β-Relaxation II: Polymers. J Phys Chem B 2015; 119:12502-18. [DOI: 10.1021/acs.jpcb.5b07293] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. L. Ngai
- CNR-IPCF, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
- State
Key Lab of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004 China
| | - S. Capaccioli
- CNR-IPCF, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
- Dipartimento
di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - D. Prevosto
- CNR-IPCF, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - Li-Min Wang
- State
Key Lab of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004 China
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6
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Ngai KL, Capaccioli S, Prevosto D, Wang LM. Coupling of Caged Molecule Dynamics to JG β-Relaxation III: van der Waals Glasses. J Phys Chem B 2015; 119:12519-25. [PMID: 26340473 DOI: 10.1021/acs.jpcb.5b07294] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the first two papers separately on the polyalcohols and amorphous polymers of this series, we demonstrated that the fast dynamics observed in the glassy state at high frequencies above circa 1 GHz is the caged dynamics. We showed generally the intensity of the fast caged dynamics changes temperature dependence at a temperature THF nearly coincident with the secondary glass transition temperature Tgβ lower than the nominal glass transition temperature Tgα. The phenomenon is remarkable, since THF is determined from measurements of fast caged dynamics at short time scales typically in the ns to ps range, while Tgβ characterizes the secondary glass transition at which the Johari-Goldstein (JG) β-relaxation time τJG reaches a long time of ∼10(3) s, determined directly either by positronium annihilation lifetime spectroscopy, calorimetry, or low frequency dielectric and mechanical relaxation spectroscopy. The existence of the secondary glass transition originates from the dependence of τJG on density, previously proven by experiments performed at elevated pressure. The fact that THF ≈ Tgβ reflects the density dependence of the caged dynamics and coupling to the JG β-relaxation. The generality of the phenomenon and its theoretical rationalization implies the same should be observable in other classes of glass-formers. In this paper, III, we consider two archetypal small molecular van der Waals glass-formers, ortho-terphenyl and toluene. The experimental data show the same phenomenon. The present paper extends the generality of the phenomenon and explanation from the polyalcohols, a pharmaceutical, and many polymers to the small molecular van der Waals glass-formers.
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Affiliation(s)
- K L Ngai
- CNR-IPCF , Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.,State Key Lab of Metastable Materials Science and Technology, Yanshan University , Qinhuangdao, Hebei 066004, China
| | - S Capaccioli
- CNR-IPCF , Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.,Dipartimento di Fisica, Università di Pisa , Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - D Prevosto
- CNR-IPCF , Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - Li-Min Wang
- State Key Lab of Metastable Materials Science and Technology, Yanshan University , Qinhuangdao, Hebei 066004, China
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7
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Bartsch E, Debus O, Fujara F, Kiebel M, Sillescu H, Petry W. Dynamic Anomalies and their Relation to the Glass Transition: A Neutron Scattering Study of the Glass Forming Van der Waals Liquid Ortho-terphenyl. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19910950938] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Rössler E. Corresponding States Concept for Simple Supercooled Liquids Identifying a Change of Diffusion Mechanism above the Glass Transition Temperature. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19900940338] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Petry W, Wuttke J. Quasielastic neutron scattering in glass forming viscous liquids. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/00411459508203945] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- W. Petry
- a Physikdepartement E13 , Technische Universität München , 85747 , Garching , GERMANY
| | - J. Wuttke
- a Physikdepartement E13 , Technische Universität München , 85747 , Garching , GERMANY
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10
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Berry RJ, Rigby D, Duan D, Schwartz M. Molecular Dynamics Study of Translational and Rotational Diffusion in Liquid Ortho-terphenyl. J Phys Chem A 2005; 110:13-9. [PMID: 16392834 DOI: 10.1021/jp053797v] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
NVT molecular dynamics simulations were performed on liquid o-terphenyl as a function of temperature in the range 320-480 K. Computed translational diffusion coefficients displayed the non-Arrhenius behavior expected of a fragile glass-forming liquid and were in good, semiquantitative agreement with experimental results. Rotational correlation functions calculated for various vectors within the molecule exhibited a very short time (0-1 ps) initial decay, followed by a reversal, which corresponds to free reorientation within the "solvent" cage prior to collision with a wall. Rotational correlation times of three orthogonal vectors fixed on the central benzene were close to equal at all temperatures, indicating nearly isotropic overall molecular reorientation. The average correlation times exhibited a non-Arrhenius temperature dependence and were in very good agreement with experimental values derived from 2D and 1H NMR relaxation times. Correlation times of vectors located on the lateral phenyl rings were used to calculate the "spinning" internal rotation diffusion coefficients, which were approximately twice as great as the overall rotational diffusion constants, indicating rapid internal rotation of the phenyl side groups over wide ranges of angle in the liquid.
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Affiliation(s)
- R J Berry
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Ohio 45433, USA
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11
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Ngai KL, Bao LR, Yee AF, Soles CL. Correlation of positron annihilation and other dynamic properties in small molecule glass-forming substances. PHYSICAL REVIEW LETTERS 2001; 87:215901. [PMID: 11736351 DOI: 10.1103/physrevlett.87.215901] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2001] [Indexed: 05/23/2023]
Abstract
Positron annihilation spectroscopy is used to characterize the ortho-positronium lifetime, tau(3), in a broad range of small molecule organic glasses over a wide temperature range. The magnitude and thermal variations of tau(3) reflect changes in the dielectric alpha-relaxation time tau(alpha) and its non-Arrhenius or "fragile" characteristics. tau(3) also displays striking similarities with the fast relaxations reflected in the hydrogen-weighted mean square atomic displacements <u(2)>. The parallel temperature variations of <u(2)(T/T(g))>, tau(3)(T/T(g)), and tau(alpha)(T/T(g)), and their similar patterns of change between the different glasses, are discussed in terms of anharmonicity in the intermolecular caging potentials and the subnanometer density heterogeneities.
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Affiliation(s)
- K L Ngai
- Naval Research Laboratory, Washington, DC 20375-5320, USA
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12
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Kanaya T, Kaji K. Dynamics in the Glassy State and Near the Glass Transition of Amorphous Polymers as Studied by Neutron Scattering. POLYMER PHYSICS AND ENGINEERING 2001. [DOI: 10.1007/3-540-44484-x_2] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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13
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Bartoš J, Krištiak J. A Phenomenological Model of Volumetric and Free Volume Hole Properties in Supercooled Liquids: The ortho-Terphenyl Case. J Phys Chem B 2000. [DOI: 10.1021/jp993703f] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Bartoš
- Polymer Institute of SAS, Dúbravská cesta 9, SK-842 36 Bratislava, Slovak Republic, and Institute of Physics of SAS, Dúbravská cesta 9, SK 842 28 Bratislava
| | - J. Krištiak
- Polymer Institute of SAS, Dúbravská cesta 9, SK-842 36 Bratislava, Slovak Republic, and Institute of Physics of SAS, Dúbravská cesta 9, SK 842 28 Bratislava
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14
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Rosche M, Winkler RG, Reineker P, Schulz M. Topologically induced glass transition in dense polymer systems. J Chem Phys 2000. [DOI: 10.1063/1.480880] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Kanaya T, Kawaguchi T, Kaji K. Microscopic view of glass transition dynamics: A quasielastic neutron scattering study on trans‐1,4‐polychloroprene. J Chem Phys 1996. [DOI: 10.1063/1.472250] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Ma J, Berg M. Application of mode-coupling theory to solvation dynamics. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 54:2786-2796. [PMID: 9965393 DOI: 10.1103/physreve.54.2786] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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17
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Affiliation(s)
- M. D. Ediger
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706
| | - C. A. Angell
- Department of Chemistry, Arizona State University, Tempe, Arizona 85287-1604
| | - Sidney R. Nagel
- James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637
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18
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Cicerone MT, Ediger MD. Enhanced translation of probe molecules in supercooled o‐terphenyl: Signature of spatially heterogeneous dynamics? J Chem Phys 1996. [DOI: 10.1063/1.471433] [Citation(s) in RCA: 394] [Impact Index Per Article: 14.1] [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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Kanaya T, Kawaguchi T, Kaji K. Fast process of amorphous polystyrene below and above the glass transition temperature Tg as studied by quasielastic neutron scattering. J Chem Phys 1996. [DOI: 10.1063/1.471037] [Citation(s) in RCA: 62] [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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20
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Garwe F, Schönhals A, Lockwenz H, Beiner M, Schröter K, Donth E. Influence of Cooperative α Dynamics on Local β Relaxation during the Development of the Dynamic Glass Transition in Poly(n-alkyl methacrylate)s. Macromolecules 1996. [DOI: 10.1021/ma9506142] [Citation(s) in RCA: 269] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- F. Garwe
- Universität Halle, Fachbereich Physik, D-06099 Halle (Saale), Germany, and Institut für Angewandte Chemie Berlin-Adlershof, Rudower Chaussee 5, D-12489 Berlin, Germany
| | - A. Schönhals
- Universität Halle, Fachbereich Physik, D-06099 Halle (Saale), Germany, and Institut für Angewandte Chemie Berlin-Adlershof, Rudower Chaussee 5, D-12489 Berlin, Germany
| | - H. Lockwenz
- Universität Halle, Fachbereich Physik, D-06099 Halle (Saale), Germany, and Institut für Angewandte Chemie Berlin-Adlershof, Rudower Chaussee 5, D-12489 Berlin, Germany
| | - M. Beiner
- Universität Halle, Fachbereich Physik, D-06099 Halle (Saale), Germany, and Institut für Angewandte Chemie Berlin-Adlershof, Rudower Chaussee 5, D-12489 Berlin, Germany
| | - K. Schröter
- Universität Halle, Fachbereich Physik, D-06099 Halle (Saale), Germany, and Institut für Angewandte Chemie Berlin-Adlershof, Rudower Chaussee 5, D-12489 Berlin, Germany
| | - E. Donth
- Universität Halle, Fachbereich Physik, D-06099 Halle (Saale), Germany, and Institut für Angewandte Chemie Berlin-Adlershof, Rudower Chaussee 5, D-12489 Berlin, Germany
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21
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Kudchadkar SR, Wiest JM. Molecular dynamics simulations of the glass former ortho‐terphenyl. J Chem Phys 1995. [DOI: 10.1063/1.470167] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Sanyal S, Sood AK. Brownian dynamics simulation of dense binary colloidal mixtures. I. Structural evolution and dynamics. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 52:4154-4167. [PMID: 9963887 DOI: 10.1103/physreve.52.4154] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Cicerone MT, Ediger MD. Relaxation of spatially heterogeneous dynamic domains in supercooled ortho‐terphenyl. J Chem Phys 1995. [DOI: 10.1063/1.470551] [Citation(s) in RCA: 331] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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25
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Bartsch E, Fujara F, Legrand JF, Petry W, Sillescu H, Wuttke J. Dynamics in viscous orthoterphenyl: Results from coherent neutron scattering. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 52:738-745. [PMID: 9963475 DOI: 10.1103/physreve.52.738] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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26
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Lewis LJ, Wahnström G. Molecular-dynamics study of supercooled ortho-terphenyl. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1994; 50:3865-3877. [PMID: 9962441 DOI: 10.1103/physreve.50.3865] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Beiner M, Garwe F, Schröter K, Donth E. Ageing effects on dynamic shear moduli at the onset of the dynamic glass transition in two poly(alkyl methacrylate)s. POLYMER 1994. [DOI: 10.1016/0032-3861(94)90586-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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28
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Kob W, Andersen HC. Kinetic lattice-gas model of cage effects in high-density liquids and a test of mode-coupling theory of the ideal-glass transition. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1993; 48:4364-4377. [PMID: 9961118 DOI: 10.1103/physreve.48.4364] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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29
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Schulz M, Reineker P. Glass transition in a Fredrickson model with vacancies. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9369-9373. [PMID: 10007174 DOI: 10.1103/physrevb.48.9369] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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30
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Wuttke J, Kiebel M, Bartsch E, Fujara F, Petry W, Sillescu H. Relaxation and phonons in viscous and glassy orthoterphenyl by neutron scattering. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01344065] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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32
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Kanaya T, Kawaguchi T, Kaji K. Low‐energy excitation and fast motion near Tg in amorphous cis‐1,4‐polybutadiene. J Chem Phys 1993. [DOI: 10.1063/1.464531] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Ren SZ, Sorensen CM. Relaxations in gels: Analogies to alpha and beta relaxations in glasses. PHYSICAL REVIEW LETTERS 1993; 70:1727-1730. [PMID: 10053369 DOI: 10.1103/physrevlett.70.1727] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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34
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Temperature dependence of the static structure factor of ortho-terphenyl in the supercooled liquid regime close to the glass transition. Chem Phys 1993. [DOI: 10.1016/0301-0104(93)85108-k] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Bartsch E, Antonietti M, Schupp W, Sillescu H. Dynamic light scattering study of concentrated microgel solutions as mesoscopic model of the glass transition in quasiatomic fluids. J Chem Phys 1992. [DOI: 10.1063/1.462934] [Citation(s) in RCA: 132] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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36
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Colmenero J, Alegría A, Arbe A, Frick B. Correlation between non-Debye behavior and Q behavior of the alpha relaxation in glass-forming polymeric systems. PHYSICAL REVIEW LETTERS 1992; 69:478-481. [PMID: 10046949 DOI: 10.1103/physrevlett.69.478] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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37
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Floudas G, Higgins JS, Fytas G. Dynamics of the glass‐forming liquid di‐2‐ethylhexyl phthalate (DOP) as studied by light scattering and neutron scattering. J Chem Phys 1992. [DOI: 10.1063/1.462368] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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38
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Kiebel M, Bartsch E, Debus O, Fujara F, Petry W, Sillescu H. Secondary relaxation in the glass-transition regime of ortho-terphenyl observed by incoherent neutron scattering. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:10301-10305. [PMID: 10000933 DOI: 10.1103/physrevb.45.10301] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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39
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Steffen W, Patkowski A, Meier G, Fischer EW. Depolarized dynamic light scattering studies of ortho‐terphenyl dynamics above Tg. J Chem Phys 1992. [DOI: 10.1063/1.461873] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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