Rotational Mobility of TEMPO Spin Probe in Polypropylene: EPR Spectra Simulation and Calculation via Approximated Formulas
The rotational correlation times of a small compact spin probe (2,2,6,6-tetramethylpiperidin-1-yl)oxyl in isotactic polypropylene were obtained over a wide temperature range by EPR spectra simulation taking into account rotational anisotropy as well as distribution of the probe molecules by rotation...
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Veröffentlicht in: | Solids 2024-12, Vol.5 (4), p.499-509 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The rotational correlation times of a small compact spin probe (2,2,6,6-tetramethylpiperidin-1-yl)oxyl in isotactic polypropylene were obtained over a wide temperature range by EPR spectra simulation taking into account rotational anisotropy as well as distribution of the probe molecules by rotational mobility. The averaged values of the rotational correlation times were compared with the corresponding values calculated using well-known approximated formulas based on the intensities and widths of the spectral lines. It was shown that the calculated values can be used as effective parameters to characterize the rotational mobility of the spin probe in the polymer matrix in a wide range of rotational correlation times. |
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ISSN: | 2673-6497 2673-6497 |
DOI: | 10.3390/solids5040033 |