Polymer relaxational dynamics associated with ionic conduction in confined geometry.
作者： J.-M. Zanotti , L. J. Smith , E. Giannelis , P. Levitz , D. L. Price
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摘要: Results of a quasi-elastic incoherent neutron scattering study the influence confinement on polyethylene oxide (PEO) and (PEO)8Li+[(CF3SO2)2N]- (or (POE)8LiTFSI) dynamics are presented. The confining media is Vycor, silica based hydrophilic porous glass. We observe strong slowing down bulk polymer under presence Li salt. also affects dramatically apparent mean-square displacement polymer. As supported by DSC measurements, PEO melting transition at 335 K strongly attenuated confinement, suggesting that modifies global structure system, increasing fraction amorphous respect to crystalline phase. Local relaxational successfully described DLM (Dejean-Laupretre-Monnerie) model usually used interpret NMR spin-lattice relaxation time data. vector dependence correlation times deduced from inelastic data found obey power-law dependence. preliminary ionic conduction measurements
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E. P. Giannelis, R. Krishnamoorti, E. Manias, Polymer-Silicate Nanocomposites: Model Systems for Confined Polymers and Polymer Brushes Polymers in Confined Environments. ,vol. 138, pp. 107- 147 ,(1999) , 10.1007/3-540-69711-X_3
Guomin Mao, Ricardo Fernandez Perea, W. Spencer Howells, David L. Price, Marie-Louise Saboungi, Relaxation in polymer electrolytes on the nanosecond timescale. Nature. ,vol. 405, pp. 163- 165 ,(2000) , 10.1038/35012032
A Triolo, V Arrighi, R Triolo, S Passerini, M Mastragostino, R.E Lechner, R Ferguson, O Borodin, G.D Smith, Dynamic heterogeneity in polymer electrolytes. Comparison between QENS data and MD simulations Physica B-condensed Matter. ,vol. 301, pp. 163- 167 ,(2001) , 10.1016/S0921-4526(01)00531-2
J. P. Donoso, T. J. Bonagamba, H. C. Panepucci, L. N. Oliveira, W. Gorecki, C. Berthier, M. Armand, Nuclear magnetic relaxation study of poly(ethylene oxide)–lithium salt based electrolytes Journal of Chemical Physics. ,vol. 98, pp. 10026- 10036 ,(1993) , 10.1063/1.464435
Grant D. Smith, Do Y. Yoon, Richard L. Jaffe, Ralph H. Colby, Ramanan Krishnamoorti, Lewis J. Fetters, Conformations and Structures of Poly(oxyethylene) Melts from Molecular Dynamics Simulations and Small-Angle Neutron Scattering Experiments Macromolecules. ,vol. 29, pp. 3462- 3469 ,(1996) , 10.1021/MA951621T
Florian Müller‐Plathe, Wilfred F. van Gunsteren, Computer simulation of a polymer electrolyte: Lithium iodide in amorphous poly(ethylene oxide) The Journal of Chemical Physics. ,vol. 103, pp. 4745- 4756 ,(1995) , 10.1063/1.470611
D. Richter, M. Monkenbusch, J. Allgeier, A. Arbe, J. Colmenero, B. Farago, Y. Cheol Bae, R. Faust, FROM ROUSE DYNAMICS TO LOCAL RELAXATION : A NEUTRON SPIN ECHO STUDY ON POLYISOBUTYLENE MELTS Journal of Chemical Physics. ,vol. 111, pp. 6107- 6120 ,(1999) , 10.1063/1.479907
R. DeJean de la Batie, F. Laupretre, L. Monnerie, Carbon-13 NMR investigation of local dynamics in bulk polymers at temperatures well above the glass transition temperature. 1. Poly(vinyl methyl ether) Macromolecules. ,vol. 21, pp. 2045- 2052 ,(1988) , 10.1021/MA00185A028
Oleg Borodin, Grant D. Smith, Molecular Dynamics Simulations of Poly(ethylene oxide)/LiI Melts. 2. Dynamic Properties Macromolecules. ,vol. 33, pp. 2273- 2283 ,(2000) , 10.1021/MA991429H
P. Levitz, G. Ehret, S. K. Sinha, J. M. Drake, Porous vycor glass: The microstructure as probed by electron microscopy, direct energy transfer, small-angle scattering, and molecular adsorption Journal of Chemical Physics. ,vol. 95, pp. 6151- 6161 ,(1991) , 10.1063/1.461583