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dc.contributor.author | Gubaidullin A. | |
dc.contributor.author | Shakirov T. | |
dc.contributor.author | Fatkullin N. | |
dc.contributor.author | Kimmich R. | |
dc.date.accessioned | 2018-09-18T20:10:26Z | |
dc.date.available | 2018-09-18T20:10:26Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0926-2040 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/137252 | |
dc.description.abstract | The Mori-Zwanzig projection operator technique was employed to derive the effective Hamiltonian for spin-segment coupling. The fluctuations of this operator are responsible for spin-lattice relaxation in polymer chains. In detail, dipolar interaction of spins is rigorously analyzed by components representing fluctuations of the Kuhn segment end-to-end vectors and local fluctuations on a length scale shorter than the root mean square Kuhn segment length. The former correspond to the usual coarse-grain picture of polymer chain mode theories. It is shown that these non-local chain modes dominate proton spin-lattice relaxation dispersion of flexible polymers at frequencies up to about 108 Hz. A corresponding evaluation of experimental data for polybutadiene melts is presented. © 2008 Elsevier Inc. All rights reserved. | |
dc.relation.ispartofseries | Solid State Nuclear Magnetic Resonance | |
dc.subject | Chain modes | |
dc.subject | Field-cycling NMR relaxometry | |
dc.subject | Local motions | |
dc.subject | Mori-Zwanzig projector formalism | |
dc.subject | Polybutadiene | |
dc.subject | Polymer dynamics | |
dc.subject | Spin-lattice relaxation | |
dc.title | Spin-lattice relaxation dispersion in polymers: Dipolar-interaction components and short- and long-time limits | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 3 | |
dc.relation.ispartofseries-volume | 35 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 147 | |
dc.source.id | SCOPUS09262040-2009-35-3-SID67349269497 |