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Title

Polymers under extreme two-dimensional confinement: Poly(ethylene oxide) in graphite oxide

AuthorsBarroso-Bujans, Fabienne ; Fernández-Alonso, Félix; Cerveny, Silvina ; Parker, Stewart F.; Alegría, Ángel ; Colmenero de León, Juan
Issue Date2011
PublisherRoyal Society of Chemistry (UK)
CitationSoft Matter 7(16): 7173-7176 (2011)
AbstractThe confinement of poly(ethylene oxide) in graphite oxide is studied using a combination of diffraction, calorimetric, and spectroscopic methods. Polymer intercalation into subnanometer graphite oxide layers leads to the complete suppression of crystallization phenomena and dielectric α-relaxation processes, as well as a slowdown of β-relaxation modes. For the first time, high-resolution inelastic neutron scattering shows that poly(ethylene oxide) under these extreme confinement conditions adopts a planar zig-zag conformation, in no way resembling the characteristic 72 helical structure of the bulk crystal. The neutron data also shows a strong suppression of the COC and OCC bending modes and a distinct broadening of C–O torsional bands.
Description4 páginas, 4 figuras.
Publisher version (URL)http://dx.doi.org/10.1039/C1SM05661A
URIhttp://hdl.handle.net/10261/44028
DOI10.1039/C1SM05661A
ISSN1744-683X
E-ISSN1744-6848
Appears in Collections:(CFM) Artículos
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