Počet záznamů: 1
Nanocomposites: Synthesis, Characterization and Applications
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SYSNO ASEP 0398092 Druh ASEP M - Kapitola v monografii Zařazení RIV C - Kapitola v knize Název The influence of the size, shape and character of nanofillers on functional properties of polyurethane elastomers Tvůrce(i) Špírková, Milena (UMCH-V) RID, ORCID
Poreba, Rafal (UMCH-V) RID, ORCID
Brožová, Libuše (UMCH-V) RID, ORCIDZdroj.dok. Nanocomposites: Synthesis, Characterization and Applications. - New York : Nova Science Publishers, 2013 / Wang X. - ISBN 978-1-62948-226-2 Rozsah stran s. 259-280 Poč.str. 22 s. Poč.str.knihy 430 Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova nanocomposite ; polyurethane ; elastomer Vědní obor RIV CD - Makromolekulární chemie CEP GA13-06700S GA ČR - Grantová agentura ČR Institucionální podpora UMCH-V - RVO:61389013 Anotace The chapter is aimed at polyurethane-inorganic nanofiller nanocomposite preparation and characterization. Polyurethane (PU) matrix is formed from aliphatic polycarbonate-based diol (MW ca. 2000; macrodiol, MD), hexamethylene diisocyanate (HDI) and butane 1,4-diol (BD; used as the chain extender). One-step procedure for PU and PU nanoomposite preparation was used. Equal ratio of MD-to-BD hydroxyl groups was used in the synthesis. PU and PU nanocomposites contain 81-82 wt. % of soft (polycarbonate-based) segments and 18 wt. % of hard segments (HDI-BD product). Pure PU matrix is distinguished by (i) thermoplastic character, (ii) high degree of the phase separation of soft and hard segments; (iii) low crystallinity (< 10%) and (iv) very good mechanical and thermomechanical properties, resulting from tensile tests and dynamic mechanical thermal analysis. Silica nanoparticles differing in size (7 to 40 nm) were used as the nanofiller in the concentration 1 wt. % in the PU nanocomposite. The influence of the size and character of the silica nanoparticles on the internal particle arrangement in PU matrix and on functional, e.g., mechanical, surface and barrier properties of PU nanocomposites was discussed, and compared with related nanocomposites containing layered nanoparticles (bentonite), studied previously. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2014 Elektronická adresa https://www.novapublishers.com/catalog/product_info.php?products_id=46124
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