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Mechanical and thermomechanical properties of polycarbonate-based polyurethane-silica nanocomposites
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SYSNO ASEP 0364732 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Mechanical and thermomechanical properties of polycarbonate-based polyurethane-silica nanocomposites Author(s) Poreba, Rafal (UMCH-V) RID, ORCID
Špírková, Milena (UMCH-V) RID, ORCID
Hrdlička, Z. (CZ)Source Title Processing and Application of Ceramics - ISSN 1820-6131
Roč. 5, č. 3 (2011), s. 155-159Number of pages 5 s. Language eng - English Country CS - CS Keywords fumed silica ; polycarbonate diol ; nanocomposites Subject RIV CD - Macromolecular Chemistry R&D Projects GAP108/10/0195 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) Annotation In this work aliphatic polycarbonate-based polyurethane-silica nanocomposites were synthesized and characterized. The influence of the type and of the concentration of nanofiller differing in average particle size (7 nm for Aerosil 380 and 40 nm for Nanosilica 999) on mechanical and thermomechanical properties was investigated. DMTA measurements showed that Nanosilica 999, irrespective of its concentration, slightly increased the value of the storage shear modulus G’ but Aerosil 380 brings about a nearly opposite effect, the shear modulus in the rubber region decreases with increasing filler content. Very high elongations at break ranging from 800% to more than 1000%, as well as high tensile strengths illustrate excellent ultimate tensile properties of the prepared samples. The best mechanical and thermomechanical properties were found for the sample filled with 0.5 wt.% of Nanosilica 999. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2012 Electronic address http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2013%2004.pdf
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