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The orientation-enhancing effect of diphenyl aluminium phosphate nanorods in a liquid-crystalline epoxy matrix ordered by magnetic field
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SYSNO ASEP 0447928 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The orientation-enhancing effect of diphenyl aluminium phosphate nanorods in a liquid-crystalline epoxy matrix ordered by magnetic field Tvůrce(i) Mossety-Leszczak, B. (PL)
Strachota, Beata (UMCH-V) RID
Strachota, Adam (UMCH-V) RID, ORCID
Steinhart, Miloš (UMCH-V) RID
Šlouf, Miroslav (UMCH-V) RID, ORCIDZdroj.dok. European Polymer Journal. - : Elsevier - ISSN 0014-3057
Roč. 72, November (2015), s. 238-255Poč.str. 18 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova liquid-crystalline epoxy resins ; magnetic field orientation ; nanocomposites Vědní obor RIV CD - Makromolekulární chemie Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000364250000021 EID SCOPUS 84942899018 DOI 10.1016/j.eurpolymj.2015.09.018 Anotace Nano-crystallites of diphenyl aluminium phosphate (NR), the polymeric molecules of which display a nanorod-like shape, were incorporated as an orientation-enhancing agent into an epoxy matrix, which was obtained by the cure of a liquid crystalline diepoxide containing a triaromatic mesogenic group. The crosslinking component of the matrix was 4,4′-diaminodiphenylmethane. Samples of the neat matrix and of the composite with NR were oriented by applying an external magnetic field during their cure. The cure process was investigated by DSC and in-situ rheology, and the obtained products were characterised by TEM, 1D- and 2D-SAXS/WAXS, DSC and DMTA. It was demonstrated, that the cuboid but anisotropic NR crystallites become oriented and highly enhance the ordering of the liquid crystalline matrix in the magnetic field. Some spontaneous ordering by NR was observed even without any field. The ordering effect of the field was stronger if it was perpendicular to, rather than parallel with the main surface of the flat samples. The dynamic-mechanical properties of the products displayed the expected anisotropy, while their thermal transitions were found to be sensitive to the achieved degree of ordering. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2016
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