dc.contributor | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor | Ctr Technol | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T14:17:38Z | |
dc.date.accessioned | 2022-10-05T15:14:05Z | |
dc.date.available | 2014-05-20T14:17:38Z | |
dc.date.available | 2022-10-05T15:14:05Z | |
dc.date.created | 2014-05-20T14:17:38Z | |
dc.date.issued | 2009-08-01 | |
dc.identifier | Polymer Testing. Oxford: Elsevier B.V., v. 28, n. 5, p. 490-494, 2009. | |
dc.identifier | 0142-9418 | |
dc.identifier | http://hdl.handle.net/11449/25284 | |
dc.identifier | 10.1016/j.polymertesting.2009.03.011 | |
dc.identifier | WOS:000267727000006 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3898400 | |
dc.description.abstract | The 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.language | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation | Polymer Testing | |
dc.relation | 2.247 | |
dc.relation | 0,669 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | NMR | |
dc.subject | Carbon-13 solid state | |
dc.subject | Nanocomposites | |
dc.subject | Photodegradation | |
dc.title | NMR study of styrene-butadiene rubber (SBR) and TiO2 nanocomposites | |
dc.type | Artigo | |