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Digitale Medien

Mapping of motional heterogeneity in organic-inorganic nanocomposite gels (1996)

Brik, M. E. ; Titman, J. J. ; Bayle, J. P. ; [weitere]

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part B: Polymer Physics 34 (1996), S. 2533-2542

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Details

ISSN: 0887-6266

Schlagwort(e): organic-inorganic nanocomposites ; sol-gel ; poly(ethyleneoxide) ; EPR ; NMR ; molecular and macromolecular dynamics ; Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Organic-inorganic nanocomposite gels comprising poly(ethyleneoxide) chains grafted between silica particles have been studied by electron paramagnetic and nuclear magnetic resonances. Motional heterogeneity has been investigated as a function of gelation and drying by paramagnetic probes dissolved in the organic phase or grafted onto the inorganic nodes. The organic phase exhibits marked variations in dynamic behavior with the liquid-like mobility of the polymer chains strongly hindered at the silica nodes. The conclusions of the EPR study are confirmed by liquid- and solid-state carbon-13 NMR measurements. © 1996 John Wiley & Sons, Inc.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

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