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The orientation-enhancing effect of diphenyl aluminium phosphate nanorods in a liquid-crystalline epoxy matrix ordered by magnetic field

SYSNO ASEP	0447928
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	The orientation-enhancing effect of diphenyl aluminium phosphate nanorods in a liquid-crystalline epoxy matrix ordered by magnetic field
Author(s)	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, ORCID}
Source Title	European Polymer Journal. - : Elsevier - ISSN 0014-3057 Roč. 72, November (2015), s. 238-255
Number of pages	18 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	liquid-crystalline epoxy resins ; magnetic field orientation ; nanocomposites
Subject RIV	CD - Macromolecular Chemistry
Institutional support	UMCH-V - RVO:61389013
UT WOS	000364250000021
EID SCOPUS	84942899018
DOI	10.1016/j.eurpolymj.2015.09.018
Annotation	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.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2016

Number of the records: 1