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Achieving structural anisotropy of liquid crystalline epoxy by manipulation with crosslinking parameters
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SYSNO ASEP 0536881 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Achieving structural anisotropy of liquid crystalline epoxy by manipulation with crosslinking parameters Author(s) Kisiel, M. (PL)
Mossety-Leszczak, B. (PL)
Strachota, Beata (UMCH-V) RID
Strachota, Adam (UMCH-V) RID, ORCIDSource Title Express Polymer Letters. - : Budapest University of Technology and Economics, Department of Polymer Engineering - ISSN 1788-618X
Roč. 15, č. 3 (2021), s. 274-287Number of pages 14 s. Language eng - English Country HU - Hungary Keywords polymer composites ; smart polymers ; thermosetting resins Subject RIV CD - Macromolecular Chemistry OECD category Polymer science Method of publishing Open access Institutional support UMCH-V - RVO:61389013 UT WOS 000604604200008 EID SCOPUS 85099451505 DOI 10.3144/expresspolymlett.2021.24 Annotation The article presents a detailed study of the curing process of liquid crystalline epoxy resin focused on selecting optimal crosslinking conditions allowing to achieve a highly anisotropic product. By the manipulation of time, temperature, and applied magnetic induction during the chemical reaction, leading to the formation of neat epoxy and carbon-epoxy composite, the desired conclusions were developed. During X-ray analysis, it was established that the most anisotropic network is created when the following parameters are chosen: low curing temperature, short time of curing, and high magnetic induction. These conditions, however, do not allow to synthesize fully cured products, so the two-stage process was proposed,which slightly deteriorates the level of anisotropy, giving maximum conversion in return. The level of order is described with a dependent on the intensity of peaks present on the X-ray scattering plots parameter called the orientation function OF. The introduction of a graphite-like nanofiller generally slightly decreases the anisotropy of the polymer network. The main finding of this article is the optimized process of curing, allowing to obtain highly anisotropic material. This optimization shows tendencies between material ordering and curing properties, so it can be useful in future studies allowing to reach optimal conditions a lot faster. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address http://www.expresspolymlett.com/issue.php?y=2021&n=3
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