The free volume in acrylic resin/laponite nanocomposite coatingsThe free volume in acrylic resin/laponite nanocomposite coatings Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-242011enThe morphological features and the free volume properties of an acrylic resin/laponite nanocomposite are investigated using X-ray diffraction and Positron Annihilation Lifetime Spectroscopy. The effects of particle loading on the degree of exfoliation is examined. The measured lifetime spectra and the relative intensities of samples with different particle loading, as well as the shape parameters of the Doppler line broadening are correlated to the free volume in the nanocomposite and the measured CO2 gas solubility. The effect of the exfoliated nanoclay on the free volume of the composite is found to be very small for clay volume fraction up to 0.2%.http://creativecommons.org/licenses/by/4.0/European Polymer Journal473264-272 Choudalakis Georgios Gotsis Alexandros Γκοτσης Αλεξανδρος Schut Henk Picken Stephen J. Elsevier Nanocomposite materials Nanostructured composite materials Nanostructured composites nanocomposites materials nanocomposite materials nanostructured composite materials nanostructured composites Coating Positron Annihilation Lifetime Spectroscopy Gas permeability