Reference : Poly(epsilon-caprolactone)/clay nanocomposites by in-situ intercalative polymerization c...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/4173
Poly(epsilon-caprolactone)/clay nanocomposites by in-situ intercalative polymerization catalyzed by dibutyltin dimethoxide
English
Lepoittevin, Bénédicte [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials (SMPC) > >]
Pantoustier, Nadège [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials (SMPC) > >]
Devalckenaere, Myriam [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials (SMPC) > >]
Alexandre, Michaël mailto [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials (SMPC) > >]
Kubies, Dana [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Calberg, Cédric mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Dubois, Philippe mailto [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials (SMPC) > >]
22-Oct-2002
Macromolecules
Amer Chemical Soc
35
22
8385-8390
Yes (verified by ORBi)
International
0024-9297
Washington
[en] nanocomposite ; clay
[en] Poly(epsilon-caprolactone)/clay nanocomposites were prepared by in-situ ring-opening polymerization of epsilon-caprolactone by using dibutyltin dimethoxide as an initiator/catalyst. A nonmodified Na+-montmorillonite and two montmorillonites surface-modified by dimethyl 2-ethylhexyl (hydrogenated tallow alkyl) and methyl bis(2-hydroxyethyl) (hydrogenated tallow alkyl) ammonium cations, respectively, were used. The evolution of molecular weights was followed in relation to silicate surface modification and clay concentration. The alcohol-bearing organo-modified clay was a co-initiator for the polymerization reaction and thus controlled the molecular weight of the PCL chains. Furthermore, the number-average molecular weight of the growing PCL chains linearly increased with the monomer conversion. Nanocomposites were analyzed by small-angle X-ray diffraction, transmission electron microscopy, and thermogravimetry. The clay dispersion depended on the structure of the alkylammonium used to make the clay more hydrophobic. Exfoliated nanocomposites were formed when hydroxyl-containing alkylammonium. was used; otherwise, intercalated structures were reported. Thermogravimetric analyses showed a higher degradation temperature for the exfoliated structures than for the intercalated ones, both of them exceeding the degradation temperature of unfilled poly(epsilon-caprolactone).
Center for Education and Research on Macromolecules (CERM)
Fonds Social Européen - FSE ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Services Fédéraux des Affaires Scientifiques, Techniques et Culturelles - SSTC ; Région wallonne for support in the frame of the W.D.U. program: TECMAVER
Researchers
http://hdl.handle.net/2268/4173
10.1021/ma020300w
http://pubs.acs.org/doi/pdf/10.1021/ma020300w

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