Abstract
Reliable NMR determination of the stereoisomeric composition of polyisoprene obtained in the presence of a catalyst based on a solvation complex of gadolinium chloride with isopropanol, activated with triisobutylaluminum, is possible only after thorough removal of traces of gadolinium compounds, which are strong relaxants in magnetic resonance imaging. In determination of the stereoisomeric composition of polyisoprene by Fourier IR spectroscopy, more reliable results are reached when plotting a separate baseline for each absorption band.
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ACKNOWLEDGMENTS
The analyses (measurements and calculations) were performed using the equipment of the Chemistry Center for Shared Use, Ufa Institute of Chemistry, Russian Academy of Sciences.
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The study was financially supported within the framework of government assignment nos. 1021062311391-0-1.4.4 and FJWU-2020-0027.
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Translated from Zhurnal Prikladnoi Khimii, No. 10, pp. 1282–1292, October, 2022 https://doi.org/10.31857/S0044461822100073
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Styazhkin, D.V., Shishlov, N.M., Lobov, A.N. et al. Stereoregularity of Polyisoprene Obtained in the Presence of a Catalyst Based on Gadolinium Chloride. Russ J Appl Chem 95, 1573–1583 (2022). https://doi.org/10.1134/S1070427222100081
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DOI: https://doi.org/10.1134/S1070427222100081