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Fluorine-19 MAS and 1H→19F CP/MAS NMR studies of Viton fluoropolymers

✍ Scribed by Gustavo A. Monti; Robin K. Harris

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
191 KB
Volume
36
Category
Article
ISSN
0749-1581

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✦ Synopsis

Fluorine-19M1HN nuclear magnetic resonance (NMR) at 188.29 MHz, including 1H ] 19FM1HN crosspolarization (CP) with high-speed magic-angle spinning (MAS), was used to study some Ñuoropolymers of the Viton type. The systems examined were (a) copolymers of vinylidene Ñuoride and hexaÑuoropropene and (b) terpolymers of vinylidene Ñuoride, tetraÑuoroethene and hexaÑuoropropene. Both commercial and specially prepared samples were used. Di †erent 1H ] 19FM1HN CP/MAS experiments were applied to study the relaxation of the polymers. The results are discussed in terms of the CP dynamics, using parametrized equations.

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