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NMR imaging of solid polymers: Strategies for chemical‐shift selectivity
Author(s) -
Hepp Mark A.,
Miller Joel B.
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940860121
Subject(s) - polymer , anisotropy , materials science , solid state nuclear magnetic resonance , selectivity , orientation (vector space) , solid state , contrast (vision) , nanotechnology , nuclear magnetic resonance , chemistry , computer science , optics , artificial intelligence , organic chemistry , physics , composite material , geometry , mathematics , catalysis
One reason that the solid‐state imaging field is exciting is because of its potential to provide spatially resolved chemical information from deep inside a solid sample. To achieve this goal, methods are needed which exploit the many NMR parameters to generate image contrast. We describe two strategies for employing the chemical‐shift anisotropy as a contrast mechanism in images of abundant nuclei in solid polymers. We illustrate these approaches with images which map spatial variations of molecular orientation in samples of polytetrafluoroethylene.