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Polyamide/layered silicate nanocomposites: A correlation between fracture toughness and molecular mobility
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SYSNO ASEP 0334339 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Polyamide/layered silicate nanocomposites: A correlation between fracture toughness and molecular mobility Title Nanokompozity polyamid/vrstevnatý silikát: Vztah mezi lomovou houževnatostí a molekulární mobilitou Author(s) Kotek, Jiří (UMCH-V) RID
Kelnar, Ivan (UMCH-V) RID, ORCID
Brus, Jiří (UMCH-V) RID, ORCID
Urbanová, Martina (UMCH-V) RID, ORCIDSource Title E-Polymers. - : EUROPEAN POLYMER FEDERATION - ISSN 1618-7229
-, č. 138 (2009), s. 1-11Number of pages 11 s. Language eng - English Country US - United States Keywords nanocomposite ; toughness ; molecular mobility Subject RIV CD - Macromolecular Chemistry R&D Projects IAA400500602 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KJB200500601 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000273086900001 Annotation The study correlates toughness of polyamide nanocomposites with the molecular mobility of polymer segments in the amorphous phase. Nanocomposite systems with intercalated and fully exfoliated morphology were compared. The different morphology was imprinted in fracture behaviour, toughness of exfoliated nanocomposites was markedly lower that that of their intercalated counterparts. To explain this difference, a solid-state NMR was used as a selective tool for providing information about nanocomposites structure and, primarily, about dynamics of polymer segments. Comparison of NMR spin-relaxation behavior with fracture mechanics experiments revealed a close correlation between fracture toughness and the intensity of rapidly relaxing component of the amorphous phase. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2010
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