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Biodegradable polyester nanocomposites: the effect of structure on mechanical and degradation behavior
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SYSNO ASEP 0366920 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Biodegradable polyester nanocomposites: the effect of structure on mechanical and degradation behavior Author(s) Kotek, Jiří (UMCH-V) RID
Kubies, Dana (UMCH-V) RID, ORCID
Baldrian, Josef (UMCH-V)
Kovářová, Jana (UMCH-V) RIDSource Title European Polymer Journal. - : Elsevier - ISSN 0014-3057
Roč. 47, č. 12 (2011), s. 2197-2207Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords nanocomposite ; poly(.epsilon.-caprolactone) ; layered silicate Subject RIV JI - Composite Materials R&D Projects KJB200500601 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000298204500003 DOI 10.1016/j.eurpolymj.2011.09.005 Annotation The study describes the effect of the layered silicate content and its dispersion on the mechanical and degradation behavior of poly(.epsilon.-caprolactone) (PCL) nanocomposites. Two nanocomposite systems were compared: intercalated and exfoliated nanocomposites. They were prepared by melt-compounding of PCL with in situ polymerized silicate masterbatches or an organophilized montmorillonite. It has been shown that stiffness enhancement is predominantly caused by the dispersed inorganic phase but it is also supported by the contribution of the low-molecular-weight PCL fraction, which comes from the masterbatch, to the total degree of crystallinity. In contrast, the increase in the yield stress is driven mainly by the present low-molecular-weight PCL fraction with higher crystallinity. The degradation behavior reflects both the presence of the layered silicate as well as the low-molecular-weight PCL fraction. Their presence accelerates the degradation in the phosphate buffer at 37 °C. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2012
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