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The DIVAM Filter: A NMR Signal Selection Method that is Tunable to Various Structural Domains Within Semicrystalline Materials

Published online by Cambridge University Press:  26 February 2011

Paul Hazendonk ,
Tony Montina ,
Adriana Iuga  and
Philip Wormald
Paul Hazendonk
Affiliation:
paul.hazendonk@uleth.ca, University of Lethbridge, Chemistry and Biochemistry, 4401 University Dr, Lethbridge, Alberta, Canada, T1K 3M4, Lethbridge, T1K 3M4, Canada, (403) 329 2657, (403) 320 2057
Tony Montina
Affiliation:
tony.montina@uleth.ca, University of Lethbridge, Chemistry and Biochemistry, 4401 University Dr, Lethbridge, T1K 3M4, Canada
Adriana Iuga
Affiliation:
adriana.iuga@uleth.ca, University of Lethbridge, Chemistry and Biochemistry, 4401 University Dr, Lethbridge, T1K 3M4, Canada
Philip Wormald
Affiliation:
pw22@st-andrews.ac.uk, University of St Andrews, School of Chemistry, Purdie Building, St Andrews, KY 16 9ST, United Kingdom
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Abstract

The selection mechanism in the Discrimination Induced by Variable Angle Minipulse (DIVAM) sequence as a domain filter is investigated using spin dynamics simulations. Experiments on poly(vinylidinefluoride) (PVDF) show that 19F DIVAM selects on the basis of relaxation and the chemical shielding anisotropy interaction, where the role of the latter was confirmed by the simulations. The DIVAM filter was applied in domain selective 13C{1H,19F} experiments on poly[bis(trifluoroethoxy)-phosphazene] (PBFP). The resulting spectra were sensitive to morphological changes in the crystalline domain, which was not previously observed with 19F and 31P methods.

Keywords

nuclear magnetic resonance (NMR)morphologypolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 984: Symposium MM – Magnetic Resonance in Material Science , 2006 , 0984-MM07-14
Copyright
Copyright © Materials Research Society 2007

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