[en] Poly(styrene-co-acrylonitrile) (SAN)/clay nanocomposites with a high degree of clay exfoliation were prepared upon melt blending of pre-exfoliated poly(-caprolactone) (PCL)/organoclay masterbatches in a Brabender-type internal mixer. These highly filled masterbatches were synthesized by a one-pot process using supercritical carbon dioxide as a polymerization medium. During their dispersion into SAN, PCL is expected to act as a compatibilizer at the polymer–clay interface as it is miscible with the host matrix under these conditions. Reference nanocomposites based on direct melt mixing of the commercial organoclay were also prepared for the sake of comparison. The superiority of the masterbatch route in term of clay delamination efficiency has been evidenced by XRD analysis, visual and TEM observations. The effect of the nanocomposite morphology on the polymer properties was then investigated. A substantial improvement of the fire behaviour and a decrease in gas permeability have been observed for the nanocomposite containing the highest level of clay exfoliation, accompanied with a higher brittleness as evidenced by traction and impact tests.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering Chemistry
Author, co-author :
Urbanczyk, Laetitia ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Calberg, Cédric ; Université de Liège - ULiège > Department of Applied Chemistry > Laboratory of Industrial Chemistry
Benali, Samira; University of Mons-Hainaut (UMH) > Laboratory of Polymeric and Composite Materials
Bourgibot, Serge; Villeuneuve d’Ascq, France > Equipe Procédés d’Elaboration de Revêtements Fonctionnels
Espuche, Eliane; Villeurbanne, France > Laboratoire des Matériaux Polymeères et des Biomatériaux
Gouanvé, Fabrice; Villeurbanne, France > Laboratoire des Matériaux Polymeères et des Biomatériaux
Dubois, Philippe; University of Mons-Hainaut (UMH) and Materia Nova asbl > Laboratory of Polymeric and Composite Materials (UMH)
Germain, Albert ; Université de Liège - ULiège > Department of Applied Chemistry > Laboratory of Industrial Chemistry
Jérôme, Christine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Alexandre, Michaël ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Poly(caprolactone)/clay masterbatches prepared in supercritical CO2 as efficient clay delamination promoters in poly(styrene-co-acrylonitrile)
Publication date :
August 2008
Journal title :
Journal of Materials Chemistry
ISSN :
0959-9428
eISSN :
1364-5501
Publisher :
Royal Society Chemistry, Cambridge, United Kingdom
The Region Wallonne in the frame of the WINNOMAT program PROCOMO BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique F.R.S.-FNRS - Fonds de la Recherche Scientifique
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Bibliography
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B. Lepoittevin N. Panoustier M. Devalckenaere M. Alexandre D. Kubies C. Calberg R. Jerôme P. Dubois Macromolecules 2002 35 8385 8390
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A. He L. Wang J. Li J. Dong C. C. Han Polymer 2006 47 1767 1771
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