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Zhou J, Liu Z, Heng Z, Zhang H, He J, Ge Y, Chen Y, Zou H, Liang M. Utilizing the “Dangling Group Effect” Caused by the Cross-Linked Network Topology Transformation to Prepare High-Performance and Deformable Resins and Composites. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01325] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ji Zhou
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Zhuodong Liu
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Zhengguang Heng
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Haoruo Zhang
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Junliang He
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Ying Ge
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Yang Chen
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Huawei Zou
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
| | - Mei Liang
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P.R. China
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2
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Local Effects of Ring Topology Observed in Polymer Conformation and Dynamics by Neutron Scattering-A Review. Polymers (Basel) 2020; 12:polym12091884. [PMID: 32825628 PMCID: PMC7563567 DOI: 10.3390/polym12091884] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 11/24/2022] Open
Abstract
The physical properties of polymers depend on a range of both structural and chemical parameters, and in particular, on molecular topology. Apparently simple changes such as joining chains at a point to form stars or simply joining the two ends to form a ring can profoundly alter molecular conformation and dynamics, and hence properties. Cyclic polymers, as they do not have free ends, represent the simplest model system where reptation is completely suppressed. As a consequence, there exists a considerable literature and several reviews focused on high molecular weight cyclics where long range dynamics described by the reptation model comes into play. However, this is only one area of interest. Consideration of the conformation and dynamics of rings and chains, and of their mixtures, over molecular weights ranging from tens of repeat units up to and beyond the onset of entanglements and in both solution and melts has provided a rich literature for theory and simulation. Experimental work, particularly neutron scattering, has been limited by the difficulty of synthesizing well-characterized ring samples, and deuterated analogues. Here in the context of the broader literature we review investigations of local conformation and dynamics of linear and cyclic polymers, concentrating on poly(dimethyl siloxane) (PDMS) and covering a wide range of generally less high molar masses. Experimental data from small angle neutron scattering (SANS) and quasi-elastic neutron scattering (QENS), including Neutron Spin Echo (NSE), are compared to theory and computational predictions.
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3
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Cao Z, Galuska L, Qian Z, Zhang S, Huang L, Prine N, Li T, He Y, Hong K, Gu X. The effect of side-chain branch position on the thermal properties of poly(3-alkylthiophenes). Polym Chem 2020. [DOI: 10.1039/c9py01026b] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Branching closer to the backbone causes tighter packing in the side-chain direction and lower side chain and backbone dynamics.
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4
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Zhou J, Heng Z, Wu H, Zhang H, Chen Y, Zhou S, Zou H, Liang M. Preparation of Damping Structural Integrated Epoxy Resin via “Rigid-Structure Dilution” and the Study on Dangling Chains Involved Segment Interactions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05283] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ji Zhou
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
| | - Zhengguang Heng
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
| | - Hang Wu
- Beijing Special Vehicle Institute, 100072 Beijing, China
| | - Haoruo Zhang
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
| | - Yang Chen
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
| | - Shengtai Zhou
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
| | - Huawei Zou
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
| | - Mei Liang
- The State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065 Chengdu, China
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5
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Arrighi V, Gagliardi S, Ganazzoli F, Higgins JS, Raffaini G, Tanchawanich J, Taylor J, Telling MTF. Effect of Chain Length and Topological Constraints on Segmental Relaxation in Cyclic PDMS. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00397] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Valeria Arrighi
- Institute of Chemical Sciences, School of Engineering and Physical Science, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Simona Gagliardi
- Institute of Chemical Sciences, School of Engineering and Physical Science, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Fabio Ganazzoli
- Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
| | - Julia S. Higgins
- Chemical Engineering Department, Imperial College London, South Kensington
Campus, London SW7 2AZ, United Kingdom
| | - Giuseppina Raffaini
- Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
| | - Jeerachada Tanchawanich
- Institute of Chemical Sciences, School of Engineering and Physical Science, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Jenny Taylor
- Institute of Chemical Sciences, School of Engineering and Physical Science, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Mark T. F. Telling
- ISIS, Rutherford
Appleton Laboratory, Chilton, Didcot OX11 OQX, United Kingdom
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
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6
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Sasaki K, Takatsuka M, Kita R, Shinyashiki N, Yagihara S. Enthalpy and Dielectric Relaxation of Poly(vinyl methyl ether). Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00780] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Nigro V, Angelini R, Bertoldo M, Bruni F, Ricci MA, Ruzicka B. Dynamical behavior of microgels of interpenetrated polymer networks. SOFT MATTER 2017; 13:5185-5193. [PMID: 28664963 PMCID: PMC5898610 DOI: 10.1039/c7sm00739f] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Microgel suspensions of an interpenetrated Polymer Network (IPN) of PNIPAM and PAAc in D2O have been investigated through dynamic light scattering as a function of temperature, pH and concentration across the Volume Phase Transition (VPT). The dynamics of the system is slowed down under H/D isotopic substitution due to different balance states between polymer/polymer and polymer/solvent interactions suggesting the crucial role played by H-bonding. The swelling behavior, reduced with respect to PNIPAM and water, has been described by the Flory-Rehner theory, tested for PNIPAM microgel and successfully expanded to higher order for IPN microgels. Moreover the concentration dependence of the relaxation time at neutral pH has highlighted two different routes to approach the glass transition: Arrhenius and super-Arrhenius (Vogel Fulcher Tammann) respectively below and above the VPT and a fragility plot has been derived. Fragility can be tuned by changing temperature: across the VPT particles undergo a transition from soft-strong to stiff-fragile.
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Affiliation(s)
- Valentina Nigro
- Dipartimento di Fisica, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Roma, Italy.
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8
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Shi P, Schach R, Munch E, Montes H, Lequeux F. Glass Transition Distribution in Miscible Polymer Blends: From Calorimetry to Rheology. Macromolecules 2013. [DOI: 10.1021/ma400417f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peiluo Shi
- Laboratoire de Physico-Chimie
des Polymères et Milieux Dispersés, ESPCI ParisTech - CNRS, UMR 7615, 10 rue Vauquelin, 75005
Paris, France
| | - Régis Schach
- Manufacture Française des Pneumatiques Michelin, Centre de Technologies, 63040 Clermont Ferrand Cedex 9, France
| | - Etienne Munch
- Manufacture Française des Pneumatiques Michelin, Centre de Technologies, 63040 Clermont Ferrand Cedex 9, France
| | - Hélène Montes
- Laboratoire de Physico-Chimie
des Polymères et Milieux Dispersés, ESPCI ParisTech - CNRS, UMR 7615, 10 rue Vauquelin, 75005
Paris, France
| | - François Lequeux
- Laboratoire de Physico-Chimie
des Polymères et Milieux Dispersés, ESPCI ParisTech - CNRS, UMR 7615, 10 rue Vauquelin, 75005
Paris, France
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9
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Klonos P, Kaprinis S, Zarko VI, Peoglos V, Pakhlov EM, Pissis P, Gun'ko VM. Thermal and dielectric studies of PEG/C/AST nanocomposites. J Appl Polym Sci 2012. [DOI: 10.1002/app.37956] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Bartoš J, Iskrová-Miklošovičová M, Cangialosi D, Alegría A, Šauša O, Švajdlenková H, Arbe A, Krištiak J, Colmenero J. Positron annihilation and relaxation dynamics from dielectric spectroscopy: poly(vinylmethylether). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:155104. [PMID: 22436554 DOI: 10.1088/0953-8984/24/15/155104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report on the temperature dependence of the lifetime of the ortho-positronium (o-Ps), τ(3), annihilation in amorphous polymer poly(vinylmethylether) (PVME) from positron annihilation lifetime spectroscopy (PALS). We show that the behavior of τ(3)(T) can be divided into five regions, each of them having a linear temperature dependence, and that the crossover PALS temperatures situated at T(b1)(G), 0.76T(g)(PALS), T(b1)(L) = 1.14T(g)(PALS) and T(b2)(L) = 1.37T(G)(PALS), and marking the discontinuity in the free volume microstructure are related to various dynamic features from neutron scattering (NS) and broadband dielectric spectroscopy (BDS). First, a slight change in the PALS response in the glassy PVME at T(b1)(G) is related to the onset of the excess wing in an apparent correspondence with the fast secondary β motion from NS. A further slight bend in the liquid state at T(b1)(L) is related to a high-frequency tail of the primary α process as well as to the slow secondary β relaxation from BDS. In addition, it lies also in the vicinity of the crossover temperature, T(B)(βKWW), in the spectral dispersion of the primary α process, indicating a connection of the change in the o-Ps lifetime with the variation in the width of the primary α relaxation times distribution. Finally, the τ(3) value at T(b2)(L) is close to the mean relaxation time of the primary α process, τ(α), in coincidence with the crossover in the secondary effective β process between two regimes in the liquid PVME. All these relationships point to very close connections between the PALS response and the dynamic behavior of PVME, which can be explained in terms of the temperature dependence of the probability function of the liquid-like and the solid-like domains, as obtained from the two-order parameter (TOP) model description of the liquid to glass transition in glass-formers.
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Affiliation(s)
- J Bartoš
- Polymer Institute of SAS, Dúbravská cesta 9, SK-845 41 Bratislava, Slovak Republic.
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11
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Kaszyńska J, Hilczer B, Biskupski P. Segmental dynamics in poly(vinylidene fluoride) studied by dielectric, mechanical and nuclear magnetic resonance spectroscopies. Polym Bull (Berl) 2011. [DOI: 10.1007/s00289-011-0660-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Bartoš J, Šauša O, Schwartz GA, Alegría A, Alberdi JM, Arbe A, Krištiak J, Colmenero J. Positron annihilation and relaxation dynamics from dielectric spectroscopy and nuclear magnetic resonance: Cis–trans-1,4-poly(butadiene). J Chem Phys 2011; 134:164507. [DOI: 10.1063/1.3578446] [Citation(s) in RCA: 18] [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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13
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Richter D. Neutron spin echo investigations in the α and β relaxation regime of polybutadiene. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19971210114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Richter D, Arbe A, Colmenero J. Dynamics at the Glass Transition in Polymers: Results from Neutron Spectroscopy. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-455-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThis short review presents quasielastic neutron scattering and dielectric experiments on the α and βslow relaxation in polybutadiene and polyvinylchloride. Exploiting the momentum transfer dependent dynamic structure factor, spatial information about the underlying molecular motions is obtained. While the βSlow process reveals itself as a local jump with average jump distances of about 1.5 Å, the a relaxation is diffusive and occurs statistically independently from the βslow process. With this result a consistent interpretation of dielectric spectra on the same polymer is achieved. Finally some new results on the a process in PVC are presented.
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15
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Sacristan J. Investigation of the Crossover From Simple Liquid-Like to a Polymer-Like Behavior of Polyisoprene by Means of MD Simulations. MACROMOL THEOR SIMUL 2010. [DOI: 10.1002/mats.201000014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Klonos P, Pissis P, Gun’ko V, Kyritsis A, Guzenko N, Pakhlov E, Zarko V, Janusz W, Skubiszewska-Zięba J, Leboda R. Interaction of poly(ethylene glycol) with fumed silica and alumina/silica/titania. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.03.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Capponi S, Arbe A, Alvarez F, Colmenero J, Frick B, Embs JP. Atomic motions in poly(vinyl methyl ether): A combined study by quasielastic neutron scattering and molecular dynamics simulations in the light of the mode coupling theory. J Chem Phys 2009; 131:204901. [DOI: 10.1063/1.3258857] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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García Sakai V, Maranas JK, Peral I, Copley JRD. Dynamics of PEO in Blends with PMMA: Study of the Effects of Blend Composition via Quasi-Elastic Neutron Scattering. Macromolecules 2008. [DOI: 10.1021/ma0714870] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Victoria García Sakai
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Janna K. Maranas
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Inmaculada Peral
- NIST Center for Neutron Research, National Institute of Standards & Technology, Gaithersburg, Maryland 20899, and Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742
| | - John R. D. Copley
- NIST Center for Neutron Research, National Institute of Standards & Technology, Gaithersburg, Maryland 20899
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Sato H, Bottle SE, Blinco JP, Micallef AS, Eaton GR, Eaton SS. Electron spin-lattice relaxation of nitroxyl radicals in temperature ranges that span glassy solutions to low-viscosity liquids. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2008; 191:66-77. [PMID: 18166493 PMCID: PMC2671210 DOI: 10.1016/j.jmr.2007.12.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Revised: 12/07/2007] [Accepted: 12/07/2007] [Indexed: 05/12/2023]
Abstract
Electron spin-lattice relaxation rates, 1/T1, at X-band of nitroxyl radicals (4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl, 4-oxo-2,2,6,6-tetramethylpiperidin-1-oxyl, 3-carbamoyl-2,2,5,5-tetramethylpyrrolidin-1-oxyl and 3-carbamoyl-2,2,5,5-tetramethylpyrrolin-1-oxyl) in glass-forming solvents (decalin, glycerol, 3-methylpentane, o-terphenyl, 1-propanol, sorbitol, sucrose octaacetate, and 1:1 water:glycerol) at temperatures between 100 and 300K were measured by long-pulse saturation recovery to investigate the relaxation processes in slow-to-fast tumbling regimes. A subset of samples was also studied at lower temperatures or at Q-band. Tumbling correlation times were calculated from continuous wave lineshapes. Temperature dependence and isotope substitution (2H and 15N) were used to distinguish the contributions of various processes. Below about 100K relaxation is dominated by the Raman process. At higher temperatures, but below the glass transition temperature, a local mode process makes significant contributions. Above the glass transition temperature, increased rates of molecular tumbling modulate nuclear hyperfine and g anisotropy. The contribution from spin rotation is very small. Relaxation rates at X-band and Q-band are similar. The dependence of 1/T1 on tumbling correlation times fits better with the Cole-Davidson spectral density function than with the Bloembergen-Purcell-Pound model.
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Affiliation(s)
- Hideo Sato
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208
| | - Steven E. Bottle
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434 Q4001, Australia
| | - James P. Blinco
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434 Q4001, Australia
| | - Aaron S. Micallef
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434 Q4001, Australia
| | - Gareth R. Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208
| | - Sandra S. Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208
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20
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Gun'ko VM, Pissis P, Spanoudaki A, Zarko VI, Nychiporuk YM, Andriyko LS, Goncharuk EV, Leboda R, Skubiszewska-Zieba J, Osovskii VD, Ptushinskii YG. Relaxation phenomena in poly(vinyl alcohol)/fumed silica affected by interfacial water. J Colloid Interface Sci 2007; 312:201-13. [PMID: 17482636 DOI: 10.1016/j.jcis.2007.03.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 02/28/2007] [Accepted: 03/22/2007] [Indexed: 11/29/2022]
Abstract
Interaction of poly(vinyl alcohol) (PVA) with fumed silica was investigated in the gas phase and aqueous media using adsorption, broadband dielectric relaxation spectroscopy (DRS), thermally stimulated depolarization current (TSDC), infrared spectroscopy, thermal analysis, and one-pass temperature-programmed desorption (OPTPD) mass-spectrometry (MS) methods. PVA monolayer formation leads to certain textural changes in the system (after suspension and drying) because of strong hydrogen bonding of the polymer molecules to silica nanoparticles preventing strong interaction between silica particles themselves. This strong interaction promotes associative desorption of water molecules at lower temperatures than in the case of silica alone. Interaction of PVA with silica and residual water leads to depression of glass transition temperature (T(g)). There are three types of dipolar relaxations at temperatures lower and higher than the T(g) value. A small amount of adsorbed water leads to significant conductivity with elevating temperature.
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Affiliation(s)
- V M Gun'ko
- Institute of Surface Chemistry, 17 General Naumov Street, Kiev 03164, Ukraine.
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21
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Pérez Aparicio R, Arbe A, Colmenero J, Frick B, Willner L, Richter D, Fetters LJ. Quasielastic Neutron Scattering Study on the Effect of Blending on the Dynamics of Head-to-Head Poly(propylene) and Poly(ethylene−propylene). Macromolecules 2006. [DOI: 10.1021/ma052006k] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. Pérez Aparicio
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
| | - A. Arbe
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
| | - J. Colmenero
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
| | - B. Frick
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
| | - L. Willner
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
| | - D. Richter
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
| | - L. J. Fetters
- Departamento de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain; Unidad Física de Materiales (CSIC-UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain; Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France; Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany; and School of Chemical and Biomolecular Engineering, Cornell University, Ithaca,
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22
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Tyagi M, Alegría A, Colmenero J. Heterogeneous dynamics of poly(vinyl acetate) far above Tg: A combined study by dielectric spectroscopy and quasielastic neutron scattering. J Chem Phys 2005; 122:244909. [PMID: 16035818 DOI: 10.1063/1.1931664] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have investigated the dynamics of poly(vinly acetate) using broadband dielectric spectroscopy (DS) covering over 14 decades in frequency up to 20 GHz and high-resolution quasielastic neutron-scattering (QENS) technique. The dielectric results have been interpreted in terms of the phenomenological Kohlrausch-Williams-Watts [G. Williams and D. C. Watts, Trans. Faraday Soc. 66, 80 (1970); F. Alvarez, A. Alegria, and J. Colmenero, Phys. Rev. B 47, 125 (1993)] description. Because of the wide frequency range covered by DS, it provides a precise determination of dynamics over a wide temperature range and it revealed a crossover in polymer dynamics at 387 K through different dielectric parameters, viz., characteristic times, asymmetric shape parameter, and dielectric strength. Moreover, shape parameter is found to be higher in comparison to other typical polymeric systems. The characteristic relaxation times observed by QENS displayed an anomalous dependence of momentum transfer, indicating the possible existence of heterogeneities in the system even at the high temperatures. In addition, spin-lattice relaxation times, T(1), were found to be decoupled from dielectric characteristic times. Based on these results, a model was proposed to account for heterogeneities where we consider coexistence of different regions with standard polymeric behavior but with different characteristic times, leading to a distribution of relaxation times. The model is found to account for the anomalous behavior and an inherent shape parameter is found to account for the shape of alpha relaxation. This model is also found to predict the T variation of T(1) characteristic time scales at all temperatures. The origin of the heterogeneous domains is believed to lie in the microstructure of polymer chains.
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Affiliation(s)
- Madhusudan Tyagi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, San Sebastian, Spain.
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23
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Zhang S, Runt J. Segmental Dynamics and Ionic Conduction in Poly(vinyl methyl ether)−Lithium Perchlorate Complexes. J Phys Chem B 2004; 108:6295-302. [DOI: 10.1021/jp0499777] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shihai Zhang
- Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - James Runt
- Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
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24
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Arrighi V, Gagliardi S, Zhang C, Ganazzoli F, Higgins JS, Ocone R, Telling MTF. A Unified Picture of the Local Dynamics of Poly(dimethylsiloxane) across the Melting Point. Macromolecules 2003. [DOI: 10.1021/ma034843x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Valeria Arrighi
- Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, EH14 4AS Edinburgh, UK
| | - Simona Gagliardi
- Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, EH14 4AS Edinburgh, UK
| | - Chuhong Zhang
- Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, EH14 4AS Edinburgh, UK
| | - Fabio Ganazzoli
- Dipartimento di Chimica, Materiali e Ing. Chimica “Giulio Natta“, Sez. Chimica Politecnico di Milano via L. Mancinelli 7, 20131 Milano, Italy
| | - Julia S. Higgins
- Department of Chemical Engineering and Chemical Technology, Imperial College, South Kensington Campus, London, SW7 2AZ, UK
| | - Raffaella Ocone
- Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, EH14 4AS Edinburgh, UK
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25
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Intermediate length scale dynamics in glass forming polymers: coherent and incoherent quasielastic neutron scattering results on polyisobutylene. Chem Phys 2003. [DOI: 10.1016/s0301-0104(03)00095-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Arrighi V, Batt-Coutrot D, Zhang C, Telling MTF, Triolo A. Effect of tacticity on the local dynamics of polypropylene melts. J Chem Phys 2003. [DOI: 10.1063/1.1579476] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Ahumada O, Theodorou DN, Triolo A, Arrighi V, Karatasos C, Ryckaert JP. Segmental Dynamics of Atactic Polypropylene As Revealed by Molecular Simulations and Quasielastic Neutron Scattering. Macromolecules 2002. [DOI: 10.1021/ma011807u] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Oscar Ahumada
- Department of Chemical Engineering, University of Patras and ICE/HT-FORTH, GR-26500 Patras, Greece, Chemistry Department, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom, and Laboratoire de Physique des Polymères, CP223, Université Libre de Bruxelles, Boulevard de Triomphe, B-1050 Bruxelles, Belgique
| | - Doros N. Theodorou
- Department of Chemical Engineering, University of Patras and ICE/HT-FORTH, GR-26500 Patras, Greece, Chemistry Department, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom, and Laboratoire de Physique des Polymères, CP223, Université Libre de Bruxelles, Boulevard de Triomphe, B-1050 Bruxelles, Belgique
| | - Alessandro Triolo
- Department of Chemical Engineering, University of Patras and ICE/HT-FORTH, GR-26500 Patras, Greece, Chemistry Department, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom, and Laboratoire de Physique des Polymères, CP223, Université Libre de Bruxelles, Boulevard de Triomphe, B-1050 Bruxelles, Belgique
| | - Valeria Arrighi
- Department of Chemical Engineering, University of Patras and ICE/HT-FORTH, GR-26500 Patras, Greece, Chemistry Department, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom, and Laboratoire de Physique des Polymères, CP223, Université Libre de Bruxelles, Boulevard de Triomphe, B-1050 Bruxelles, Belgique
| | - Costas Karatasos
- Department of Chemical Engineering, University of Patras and ICE/HT-FORTH, GR-26500 Patras, Greece, Chemistry Department, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom, and Laboratoire de Physique des Polymères, CP223, Université Libre de Bruxelles, Boulevard de Triomphe, B-1050 Bruxelles, Belgique
| | - Jean-Paul Ryckaert
- Department of Chemical Engineering, University of Patras and ICE/HT-FORTH, GR-26500 Patras, Greece, Chemistry Department, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom, and Laboratoire de Physique des Polymères, CP223, Université Libre de Bruxelles, Boulevard de Triomphe, B-1050 Bruxelles, Belgique
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28
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Arbe A, Moral A, Alegrı́a A, Colmenero J, Pyckhout-Hintzen W, Richter D, Farago B, Frick B. Heterogeneous structure of poly(vinyl chloride) as the origin of anomalous dynamical behavior. J Chem Phys 2002. [DOI: 10.1063/1.1485283] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Masubuchi T, Furutani H, Fukumura H, Masuhara H. Laser-Induced Nanometer−Nanosecond Expansion and Contraction Dynamics of Poly(methyl methacrylate) Film Studied by Time-Resolved Interferometry. J Phys Chem B 2001. [DOI: 10.1021/jp0025328] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomokazu Masubuchi
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Furutani
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Fukumura
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Masuhara
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
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30
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Masubuchi T, Furutani H, Fukumura H, Masuhara H. Nanometer–Nanosecond Oscillatory Expansion and Contraction Behavior of Polymer Films Induced by 248 nm Excimer Laser Excitation. Chemphyschem 2000; 1:137-9. [DOI: 10.1002/1439-7641(20001103)1:3<137::aid-cphc137>3.0.co;2-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2000] [Indexed: 11/08/2022]
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31
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Bordi F, Cametti C, Paradossi G. A comparative study of the high-frequency dielectric properties of poly (alpha-glutamate) and poly (gamma-glutamate) aqueous solutions. Biopolymers 2000; 40:485-94. [PMID: 9062071 DOI: 10.1002/(sici)1097-0282(1996)40:5%3c485::aid-bip6%3e3.0.co;2-s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The dielectric properties of poly(alpha-glutamic acid) and poly(gamma-glutamic acid) aqueous solutions in the fully ionized state have been investigated in the frequency range from 1 MHz to 1 GHz by means of frequency-domain dielectric spectroscopy measurements. In this frequency range, micro-Brownian dynamics and internal motion of side-chain polar groups give rise to nonexponential relaxation processes resulting in an intermediate dielectric relaxation between that due to the counterion atmosphere polarization and that due to the orientational polarization of the water molecules. In this work, we study the influence of the polymer concentration in the dilute--semidilute regime on the dielectric parameters, i.e., the dielectric increment delta epsilon and the relaxation time tau, and discuss their relevance in the light of some scaling pictures recently proposed by Dobrynin, Colby, and Rubinstein to describe the unentangled regime of flexible polyelectrolyte solutions.
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Affiliation(s)
- F Bordi
- Dipartimento di Medicina Interna, Università di Roma, Tor Vergata, Italy
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32
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Cendoya I, Alegría A, Alberdi JM, Colmenero J, Grimm H, Richter D, Frick B. Effect of Blending on the PVME Dynamics. A Dielectric, NMR, and QENS Investigation. Macromolecules 1999. [DOI: 10.1021/ma9819539] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | - B. Frick
- Institut Laue-Langevin, BP. 156, F-38042 Grenoble, France
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33
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Pathak JA, Colby RH, Floudas G, Jérôme R. Dynamics in Miscible Blends of Polystyrene and Poly(vinyl methyl ether). Macromolecules 1999. [DOI: 10.1021/ma9817121] [Citation(s) in RCA: 123] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jai A. Pathak
- Departments of Chemical Engineering and Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, Foundation for Research and Technology−Hellas (FORTH), Institute of Electronic Structure and Laser, P.O. Box 1527, 711 10 Heraklion, Crete, Greece, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - Ralph H. Colby
- Departments of Chemical Engineering and Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, Foundation for Research and Technology−Hellas (FORTH), Institute of Electronic Structure and Laser, P.O. Box 1527, 711 10 Heraklion, Crete, Greece, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - George Floudas
- Departments of Chemical Engineering and Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, Foundation for Research and Technology−Hellas (FORTH), Institute of Electronic Structure and Laser, P.O. Box 1527, 711 10 Heraklion, Crete, Greece, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - Robert Jérôme
- Departments of Chemical Engineering and Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, Foundation for Research and Technology−Hellas (FORTH), Institute of Electronic Structure and Laser, P.O. Box 1527, 711 10 Heraklion, Crete, Greece, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
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34
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Ivanov D, Jonas A. A comparison of the α-relaxation of amorphous poly(aryl-ether-ether-ketone) (PEEK) probed by dielectric and dynamic mechanical analysis. POLYMER 1998. [DOI: 10.1016/s0032-3861(97)10267-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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35
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Donth E, Beiner M, Reissig S, Korus J, Garwe F, Vieweg S, Kahle S, Hempel E, Schröter K. Fine Structure of the Main Transition in Amorphous Polymers: Entanglement Spacing and Characteristic Length of the Glass Transition. Discussion of Examples. Macromolecules 1996. [DOI: 10.1021/ma951881a] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. Donth
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - M. Beiner
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - S. Reissig
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - J. Korus
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - F. Garwe
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - S. Vieweg
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - S. Kahle
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - E. Hempel
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
| | - K. Schröter
- Fachbereich Physik, Universität Halle, 06099 Halle (Saale), Germany
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36
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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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37
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Beiner M, Korus J, Lockwenz H, Schröter K, Donth E. Heat Capacity Spectroscopy Compared to Other Linear Response Methods at the Dynamic Glass Transition in Poly(vinyl acetate). Macromolecules 1996. [DOI: 10.1021/ma9504025] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Beiner
- Fachbereich Physik, Universität Halle, D-06099 Halle (Saale), Germany
| | - J. Korus
- Fachbereich Physik, Universität Halle, D-06099 Halle (Saale), Germany
| | - H. Lockwenz
- Fachbereich Physik, Universität Halle, D-06099 Halle (Saale), Germany
| | - K. Schröter
- Fachbereich Physik, Universität Halle, D-06099 Halle (Saale), Germany
| | - E. Donth
- Fachbereich Physik, Universität Halle, D-06099 Halle (Saale), Germany
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38
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Zorn R, Kanaya T, Kawaguchi T, Richter D, Kaji K. Influence of the microstructure on the incoherent neutron scattering of glass‐forming polybutadienes. J Chem Phys 1996. [DOI: 10.1063/1.471961] [Citation(s) in RCA: 14] [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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39
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Furutani H, Fukumura H, Masuhara H. Photothermal Transient Expansion and Contraction Dynamics of Polymer Films by Nanosecond Interferometry. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp953753u] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroshi Furutani
- Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Hiroshi Fukumura
- Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Hiroshi Masuhara
- Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
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40
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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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41
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Bordi F, Cametti C, Paradossi G. A comparative study of the high-frequency dielectric properties of poly(α-glutamate) and poly(γ-glutamate) aqueous solutions. Biopolymers 1996. [DOI: 10.1002/(sici)1097-0282(1996)40:5<485::aid-bip6>3.0.co;2-s] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Zorn R, Arbe A, Colmenero J, Frick B, Richter D, Buchenau U. Neutron scattering study of the picosecond dynamics of polybutadiene and polyisoprene. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 52:781-795. [PMID: 9963480 DOI: 10.1103/physreve.52.781] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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43
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Frick B, Richter D. The Microscopic Basis of the Glass Transition in Polymers from Neutron Scattering Studies. Science 1995; 267:1939-45. [PMID: 17770103 DOI: 10.1126/science.267.5206.1939] [Citation(s) in RCA: 180] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Recent neutron scattering experiments on the microscopic dynamics of polymers below and above the glass transition temperature T(g) are reviewed. The results presented cover different dynamic processes appearing in glasses: local motions, vibrations, and different relaxation processes such as alpha- and beta-relaxation. For the alpha-relaxation, which occurs above T(g), it is possible to extend the time-temperature superposition principle, which is valid for polymers on a macroscopic scale, to the microscopic time scale. However, this principle is not applicable for temperatures approaching T(g). Below T(g), an inelastic excitation at a frequency of some hundred gigahertz (on the order of several wave numbers), the "boson peak," survives from a quasi-elastic overdamped scattering law at high temperatures. The connection between this boson peak and the fast dynamic process appearing near T(g) is discussed.
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44
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Alvarez F, Colmenero J, Kanetakis J, Fytas G. Non-Lorentzian Rayleigh spectra of bulk homopolymers far above the glass transition. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:14996-15003. [PMID: 10010603 DOI: 10.1103/physrevb.49.14996] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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45
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Roe R. Short time dynamics of polymer liquid and glass studied by molecular dynamics simulation. J Chem Phys 1994. [DOI: 10.1063/1.466588] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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46
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Alegría A, Guerrica-Echevarría E, Tellería I, Colmenero J. Non-Debye dielectric relaxation around the liquid-glass transition of a glass-forming polymer. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:14857-14865. [PMID: 10005860 DOI: 10.1103/physrevb.47.14857] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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47
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Inagaki Y, Maekawa H, Yokokawa T, Shimokawa S. Nuclear-magnetic-resonance study of the dynamics of network-glass-forming systems: xNa2O. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:674-680. [PMID: 10005540 DOI: 10.1103/physrevb.47.674] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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48
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Alvarez F, Alegría A, Colmenero J. Interconnection between frequency-domain Havriliak-Negami and time-domain Kohlrausch-Williams-Watts relaxation functions. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:125-130. [PMID: 10004424 DOI: 10.1103/physrevb.47.125] [Citation(s) in RCA: 193] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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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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50
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Sidebottom DL, Bergman R, Börjesson L, Torell LM. Observation of scaling behavior in the liquid-glass transition range from dynamic light scattering in poly(propylene glycol). PHYSICAL REVIEW LETTERS 1992; 68:3587-3590. [PMID: 10045742 DOI: 10.1103/physrevlett.68.3587] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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