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Dynamic investigations of liquid crystalline elastomers and their constituents by .sup.2./sup.H NMR spectroscopy
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SYSNO ASEP 0499774 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dynamic investigations of liquid crystalline elastomers and their constituents by 2H NMR spectroscopy Author(s) Milavec, J. (SI)
Rešetič, A. (SI)
Bubnov, Alexej (FZU-D) RID, ORCID, SAI
Zalar, B. (SI)
Domenici, V. (IT)Number of authors 5 Source Title Liquid Crystals. - : Taylor & Francis - ISSN 0267-8292
Roč. 45, 13-15 (2018), s. 2158-2173Number of pages 16 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords liquid crystalline elastomer ; NMR ; mesogen ; crosslinker ; dynamic ; liquid crystals ; artificial muscles ; soft actuators Subject RIV JJ - Other Materials OECD category Materials engineering R&D Projects GA16-12150S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000455014800026 EID SCOPUS 85049966661 DOI 10.1080/02678292.2018.1494858 Annotation Several side-chain liquid single crystalline elastomers (LSCEs) were investigated by means of 2H NMR spectroscopy focusing on the temperature dependence of the spectral line width and spectral shape, as well as the T-dependence of spin-lattice and spin-spin relaxation times (T1 and T2). All measurements were performed at the Larmor frequency of 76.753 MHz for 2H. The LSCEs were prepared in the form of monodomain films by using either 2H-labelled monomers (or co-monomers), 2H-labelled crosslinkers or 2H-labelled molecular probes free to diffuse in the LSCE matrix. The main features of the measured 2H NMR properties (static and dynamic ones) in these different cases were discussed and compared with those of low-molecular-weight mesogens in the nematic and SmA phases. Among all investigated LSCEs, those 2H-labelled on the crosslinker sites present distinct properties either on the 2H NMR spectral line width and spectral shape in the paranematic and in the nematic phases. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2019
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