Vol. 80 No. 5 (2021)
METHODS

LONGITUDINAL RELAXATION RATE OF NUCLEAR MAGNETIZATION IN RUBBER SOLUTIONS: POLYBUTADIENE PROTONS

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  • N. Makhiyanov,
  • S. Yefimov
N. Makhiyanov
Public Joint-Stock Company «Nizhnekamskneftekhim»
DOI: https://doi.org/10.47664/0022-9466-2021-80-5-258-262

Published 2021-10-20

Keywords

  • high-resolution nuclear magnetic resonance spectroscopy,
  • spin-lattice (longitudinal) NMR relaxation time,
  • polybutadiene

How to Cite

[1]
Makhiyanov Н. and Yefimov С. 2021. LONGITUDINAL RELAXATION RATE OF NUCLEAR MAGNETIZATION IN RUBBER SOLUTIONS: POLYBUTADIENE PROTONS. Kauchuk i Rezina. 80, 5 (Oct. 2021), 258–262. DOI:https://doi.org/10.47664/0022-9466-2021-80-5-258-262.

Copyright (c) 2021 Kauchuk i Rezina

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

Selectively (for various structural groups of protons), the spin-lattice (longitudinal) relaxation times T1 were measured at a nuclear magnetic resonance frequency of 700 MHz in a solution of an industrial sample of SKD-L polybutadiene rubber in deuterated benzene. It is shown that the protons, depending on the structural position in the chain of the macromolecule, can differ from each other by the value of Т1 by almost 3 times. The highest value – at the level of 2,5 s – was obtained for T1 protons with double bonds. The issues of measurement accuracy are discussed. On the basis of the results obtained, practical recommendations are given for the conditions of recording high-resolution 1H NMR spectra in the quantitative analysis of the structure of polybutadienes.

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