dc.contributorUniversidade Federal de São Carlos (UFSCar)
dc.contributorCtr Technol
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:17:38Z
dc.date.accessioned2022-10-05T15:14:05Z
dc.date.available2014-05-20T14:17:38Z
dc.date.available2022-10-05T15:14:05Z
dc.date.created2014-05-20T14:17:38Z
dc.date.issued2009-08-01
dc.identifierPolymer Testing. Oxford: Elsevier B.V., v. 28, n. 5, p. 490-494, 2009.
dc.identifier0142-9418
dc.identifierhttp://hdl.handle.net/11449/25284
dc.identifier10.1016/j.polymertesting.2009.03.011
dc.identifierWOS:000267727000006
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3898400
dc.description.abstractThe chemical behavior of styrene-butadiene rubber (SBR) and of the SBR/TiO2 and photodegraded SBR/TiO2 nanocomposites was investigated through nuclear magnetic resonance spectroscopy (NMR) in the solid state with magic angle spinning (MAS). The C-13 cross polarization/magic angle spinning (CP/MAS) routine spectrum allowed us to obtain information on the polymer microstructure and also to evaluate the domain mobilities. The variation contact time and the proton spin-lattice relaxation time in the rotating frame (T,pH) were determinant factors to evaluate the dynamic molecular motion. The NMR spectrum of the nanocomposites was dislocated 5 ppm to higher chemical shift, indicating the presence of a strong interaction between the polymer chains and the TiO2 nanoparticles. The VTC experiment showed a rigid domain in the SBR/TiO2 photodegraded nanocomposite due to cross-linking reactions. (C) 2009 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationPolymer Testing
dc.relation2.247
dc.relation0,669
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectNMR
dc.subjectCarbon-13 solid state
dc.subjectNanocomposites
dc.subjectPhotodegradation
dc.titleNMR study of styrene-butadiene rubber (SBR) and TiO2 nanocomposites
dc.typeArtigo


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