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Cycloolefin copolymer/fumed silica nanocomposites
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SYSNO ASEP 0351366 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cycloolefin copolymer/fumed silica nanocomposites Author(s) Dorigato, A. (IT)
Pegoretti, A. (IT)
Fambri, L. (IT)
Šlouf, Miroslav (UMCH-V) RID, ORCID
Kolařík, Jan (UMCH-V)Source Title Journal of Applied Polymer Science. - : Wiley - ISSN 0021-8995
Roč. 119, č. 6 (2011), s. 3393-3402Number of pages 10 s. Language eng - English Country US - United States Keywords creep ; nanocomposites ; polyolefins Subject RIV JI - Composite Materials R&D Projects GA106/09/1348 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000285312800031 DOI 10.1002/app.32988 Annotation We prepared cycloolefin copolymer (COC)/fumed silica nanocomposites by melt compounding in order to study the effect of the filler dimensions (filler surface area) on the physical properties, with particular attention to their thermal, mechanical, and optical behaviors. Thermogravimetric analysis revealed a positive contribution of silica nanoparticles to the thermal degradation resistance of COC. Dynamic mechanical thermal analysis and quasi-static tensile tests of the nanocomposites evidenced a slight stiffening effect, proportional to the nanofiller surface area, without any reduction in the fracture toughness. The positive effect of the nanoparticles on the viscoelastic, creep and fracture behavior was related to the uniform dispersion of silica aggregates in the matrix. Ultraviolet–visible spectrometry measurements evidenced that the original transparency of neat COC was practically maintained after the addition of silica nanoparticles. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2011
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