Crossed characterisation of polymer-layered silicate (PLS) nanocomposite morphology: TEM, X-ray diffraction, rheology and solid-state nuclear magnetic resonance measurements |
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Authors: | Fabienne Samyn Charafeddine Jama Shonali Nazare Andrea Castrovinci Giovanni Camino |
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Institution: | a Procédés d’Elaboration de Revêtements Fonctionnels, UMR/CNRS 8008, ENSCL, BP 90108, 59652 Villeneuve d’Ascq cedex, France b Centre for Materials Research and Innovation, Bolton University, Deane Campus, Bolton, BL3 5AB, England, UK c Centro Ingegneria Materie Plastiche, V.le Teresa Michel, 5, 15100 Alessandria, Italy |
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Abstract: | As the nanocomposite properties dramatically depend on the dispersion state of the filler in the matrix, it is essential to develop technical methods to characterise the nanodispersion both qualitatively and quantitatively. In this study, complete characterisations of the nanodispersion of organomodified clays in polyamide 6, polypropylene and poly(butylene terephtalate) are presented and discussed using different analytical tools. All four characterisation methods have been evaluated experimentally. TEM has been used to qualitatively characterise the dispersion. As TEM picture might be not fully representative of the whole sample, many pictures have to be analysed to mirror the global repartition. XRD is particularly adapted to the study of intercalated morphology of nanocomposite since the distance between two platelets can be calculated but needs TEM to provide more complete conclusions. Melt rheology and solid-state NMR are bulk analyses. During the measurement the sample is representative of the material. Rheology is relatively simple to make measurements and to get semi-quantitative data. In connection with NMR, we can get quantitative measurements on the degree of nanodispersion in the nanocomposite. |
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Keywords: | Dispersion Polymer nanocomposite Rheology Solid-state NMR TEM X-ray diffraction |
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