| Biodegradable polyester layered silicate nanocomposites based on poly([epsilon]-Caprolactone).(Abstract): An article from: Polymer Engineering and Science | Digitalby Nadege Pantoustier (Author), Benedicte Lepoittevin (Author), Michael Alexandre (Author), Dana Kubies (Author), Cedric Calberg (Author), Robert Jerome (Author), Philippe Dubois (Author)
| List Price: | $5.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Society of Plastics Engineers, Inc. | | Page Count: | 19 Pages | | Publication Date: | September 01, 2002 |
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This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on September 1, 2002. The length of the article is 5647 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.From the author: Nanocomposites based on biodegradable poly([epsilon]-carprolactone) (PCL) and layered silicates (montmorillonite, MMT) were prepared either by melt intercalation with PCL or by in situ ring-opening polymerization of [epsilon]-caprolactone as promoted by the so-called coordination-insertion mechanism. Both non-modified clays ([Na.sup.+]-MMT) and silicates modified by various alkylammonium cations were studied. Mechanical and thermal properties were examined by tensile testing and thermogravimetric analysis. Even at a filler content as low as 3 wt% of inorganic layered silicate, the PCL-layered silicate nanocomposites exhibited improved mechanical properties (higher Young's modulus) and increased thermal stability as well as enhanced flame retardant characteristics as a result of a charring effect. It was shown that the formation of PCL-based nanocomposites depended not only on the nature of the ammonium cation and related functionality but also on the selected synthetic route, melt intercalation vs. in situ i ntercalative polymerization. Interestingly enough, when the intercalative polymerization of [epsilon]-caprolactone was carried out in the presence of MMT organo-modified with ammonium cations bearing hydroxyl functions, nanocomposites with much improved mechanical properties were recovered. Those hybrid polyester layered silicate nanocomposites were characterized by a covalent bonding between the polyester chains and the clay organo-surface as a result of the polymerization mechanism, which was actually initiated from the surface hydroxyl functions adequately activated by selected tin (II) or tin (IV) catalysts.Citation DetailsTitle: Biodegradable polyester layered silicate nanocomposites based on poly([epsilon]-Caprolactone).(Abstract)Author: Nadege PantoustierPublication: Polymer Engineering and Science (Refereed)Date: September 1, 2002Publisher: Society of Plastics Engineers, Inc.Volume: 42 Issue: 9 Page: 1928(10)Article Type: AbstractDistributed by Thomson Gale |
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