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Chapter 8: Application of Field-cycling <sup>1</sup>H NMR Relaxometry to the Study of Translational and Rotational Dynamics in Liquids and Polymers

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dc.date.accessioned 2019-01-22T20:56:19Z
dc.date.available 2019-01-22T20:56:19Z
dc.date.issued 2018
dc.identifier.issn 2044-253X
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/149521
dc.description.abstract © 2019 The Royal Society of Chemistry. With the availability of commercial field-cycling (FC) relaxometers together with progress in home-built instruments, NMR relaxometry has gained new momentum as a method of investigating the dynamics in complex liquids such as polymer melts or glass-forming systems. The method provides the dispersion of spin-lattice relaxation rate. Assuming frequencyerature superposition, master curves that extend up to 10 decades in amplitude and frequency are constructed from individual relaxation spectra measured at different temperatures. In the case of protons, due to the intra- and intermolecular origin of the dipolar interactions, relaxation dispersion reflects both rotational and translational dynamics. The latter displays a universal low-frequency dispersion law that allows the determination of the diffusion coefficient D in addition to the rotational time constant, i.e. FC-1H NMR becomes an alternative to field-gradient NMR. Sub-diffusive translation found in polymers is accessed by singling out the intermolecular relaxation via isotope dilution experiments. The mean square displacement was revealed to be a function of time, thus complementing neutron scattering experiments. Likewise, information on segmental reorientational dynamics is provided by the intramolecular relaxation. Thereby, thorough testing of current polymer theories becomes possible.
dc.relation.ispartofseries New Developments in NMR
dc.title Chapter 8: Application of Field-cycling <sup>1</sup>H NMR Relaxometry to the Study of Translational and Rotational Dynamics in Liquids and Polymers
dc.type Chapter
dc.relation.ispartofseries-issue 18
dc.relation.ispartofseries-volume 2019-January
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 181
dc.source.id SCOPUS2044253X-2018-2019-18-SID85056645298


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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