Laetitia Urbanczyk
University of Liège
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Featured researches published by Laetitia Urbanczyk.
Clay Minerals | 2008
A. Gerstmans; Laetitia Urbanczyk; Robert Jérôme; J.-L. Robert; Jean Grandjean
Abstract Synthetic hectorites and the corresponding surfactant-exchanged clays have been characterized by X-ray diffraction and 1H, 7Li, 13C, 23Na and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy. The low-charge clays retain water more efficiently, forming aggregates without extensive drying. The hydroxylated hectorite exhibits two 1H NMR signals near 0 ppm whereas the fluorohectorites are characterized by a single peak in the same region. The 23Na 2D 3Q magic angle spinning (MAS) spectra of the low-charge hectorites show a single peak. The 29Si NMR shift depends on the interlayer charge. Tactoids formed by the low-charge hectorites reduce the rate of surfactant incorporation. The population of the all-trans conformer of the hydrocarbon chain, determined by 13C MASNMR, varies with the surfactant content. 13C NMR relaxation data show an increase in mobility with the surfactant loading and along the long alkyl chain, from the polar head to the terminal group. Complexity of the motional behaviour precludes any detailed analysis. These modified clays are not useful in preparing poly(ε-caprolactone) nanocomposites by in situ polymerization.
Acta Materialia | 2011
Isabelle Huynen; Nicolas Quiévy; Christian Bailly; Pierre Bollen; Christophe Detrembleur; Stéphanie Eggermont; Isabel Molenberg; Jean-Michel Thomassin; Laetitia Urbanczyk; Thomas Pardoen
European Polymer Journal | 2009
Laetitia Urbanczyk; Fred Ngoundjo; Michaël Alexandre; Christine Jérôme; Christophe Detrembleur; Cédric Calberg
Polymer | 2010
Laetitia Urbanczyk; Cédric Calberg; Christophe Detrembleur; Christine Jérôme; Michaël Alexandre
Polymer | 2015
Laure Monnereau; Laetitia Urbanczyk; Jean-Michel Thomassin; Thomas Pardoen; Christian Bailly; Isabelle Huynen; Christine Jérôme; Christophe Detrembleur
Polymer Engineering and Science | 2010
Michael Mainil; Laetitia Urbanczyk; Cédric Calberg; Albert Germain; Christine Jérôme; Serge Bourbigot; Jacques Devaux; Michel Sclavons
Polymer | 2008
Laetitia Urbanczyk; Cédric Calberg; Fabrice Stassin; Michaël Alexandre; Robert Jérôme; Christine Jérôme; Christophe Detrembleur
Langmuir | 2006
Laetitia Urbanczyk; Jana Hrobarikova; Cédric Calberg; Robert Jérôme; Jean Grandjean
Journal of Materials Chemistry | 2008
Laetitia Urbanczyk; Cédric Calberg; Samira Benali; Serge Bourbigot; Eliane Espuche; Fabrice Gouanvé; Philippe Dubois; Albert Germain; Christine Jérôme; Christophe Detrembleur; Michaël Alexandre
Journal of Materials Chemistry | 2010
Laetitia Urbanczyk; Serge Bourbigot; Cédric Calberg; Christophe Detrembleur; Christine Jérôme; Frédéric Boschini; Michaël Alexandre