High‐resolution solid‐state 19F‐NMR spectroscopy of the sorption and diffusion of fluorine‐containing aromatic molecules in polymeric media
- 10 March 1993
- journal article
- research article
- Published by Wiley in Journal of Polymer Science Part A: Polymer Chemistry
- Vol. 31 (4) , 859-863
- https://doi.org/10.1002/pola.1993.080310403
Abstract
High‐resolution 19F solid‐state NMR spectroscopy was employed to study the sorption properties of hexafluorobenzene (HFB) and 3,5‐bis (trifluoromethyl) aniline (TFMA) in polystyrene (PS) and butyl rubber (BR). The NMR spectra indicate that the penetrants undergo dual‐mode sorption in the glassy polymer (PS), but are highly mobile in the rubbery polymer (BR). In addition, the NMR method was utilized in the experimental determination of diffusion coefficients for the HFB/PS, TFMA/PS, and HFB/BR systems through desorption studies. The diffusion results for the TFMA/PS case agree very well with those previously obtained via resonance nuclear reaction analysis. © 1993 John Wiley & Sons, Inc.Keywords
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