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| 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  [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 [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >] | |
| Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >] | |
| Dubois, Philippe [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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