Modifications in the correlation function in poly(vinyl alcohol)/silica hybrid wet gels

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2013-09-30T18:50:52Z
dc.date.accessioned2014-05-20T14:16:36Z
dc.date.available2013-09-30T18:50:52Z
dc.date.available2014-05-20T14:16:36Z
dc.date.created2013-09-30T18:50:52Z
dc.date.created2014-05-20T14:16:36Z
dc.date.issued2009-02-01
dc.identifierJournal of Applied Crystallography. Malden: Wiley-blackwell Publishing, Inc, v. 42, p. 10-14, 2009.
dc.identifier0021-8898
dc.identifierhttp://hdl.handle.net/11449/24993
dc.identifier10.1107/S0021889808034900
dc.identifierWOS:000262386900002
dc.identifier3538107401166553
dc.identifier5890636096105376
dc.description.abstractSmall-angle X-ray scattering was used to study structural modifications in tetraethoxysilane-derived poly(vinyl alcohol) (PVA)/silica hybrids. The basic structure of the wet gels can be described as a mass-fractal structure with fractal dimension D equal to 2 and characteristic length xi, which increases with addition of PVA. Wet gels with high PVA content exhibit a positive deviation from the mass- fractal power-law scattering at low q; this deviation is associated with additional scattering due to a second large correlation distance zeta, reinforced by the addition of PVA. The fraction of both contributions to the total correlation function was estimated; this is the first time that such a study has been carried out for mass- fractal structures.
dc.languageeng
dc.publisherWiley-Blackwell Publishing, Inc
dc.relationJournal of Applied Crystallography
dc.relation1,635
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.titleModifications in the correlation function in poly(vinyl alcohol)/silica hybrid wet gels
dc.typeArtículos de revistas


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