title: Solid-state NMR study of intercalated species in poly(epsilon-caprolactone)/clay nanocomposites.
abstract: The structure and dynamics of surfactant and polymer chains in intercalated poly(epsilon-caprolactone)/clay nanocomposites are characterized by (31)P magic-angle spinning (MAS) and (13)C cross-polarization MAS NMR techniques. To obtain hybrid materials with the low polymer content required for this study, in situ intercalative polymerization was performed by adapting a published procedure. After nanocomposite formation, the chain motion of the surfactant is enhanced in the saponite-based materials but reduced in the Laponite ones. Compared to the starting clay, the trans conformer population of the surfactant hydrocarbon chain in the nanocomposite decreases for the saponite systems. Mobility of the polymer chain is higher in the nanocomposites than in the bulk phase. The charge of the modified saponite does not significantly influence chain mobility in the nanocomposites.
authors.affiliation: University of Liege, Institute of Chemistry B6a, COSM and CERM, Sart Tilman, B-4000 Liege, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Hrobarikova
authors.forename: J-L
authors.initials: JL
authors.lastname: Robert
authors.forename: C
authors.initials: C
authors.lastname: Calberg
authors.forename: R
authors.initials: R
authors.lastname: Jérôme
authors.forename: J
authors.initials: J
authors.lastname: Grandjean