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Ok, S. ; Scheler, U.
Structure characterization of fluoropolymers

POLY 235 - NMR Spectroscopy of Polymers

Fluoropolymers play an important role because of their stability against high temperatures and a number of chemicals. Due to the low surface energy and the low friction coefficient there are wide spread applications. However, the chemical stability implies, that they cannot be dissolved in common organic solvents, therefore solution state NMR, a common tool for structure characterization of polymers is impossible. In the present study various NMR spectra of a melt-processible terpolymer consisting of tetrafluoroethylene, hexafluoropropylene and vinyilidene fluoride, are compared. Solid-state spectra, that have been acquired under high-speed MAS, are compared to spectra taken in the melt and spectra of THV-200 dissolved in supercritical CO2. The best resolution is found in the solution in sc CO2, but in the melt better sensitivity is achieved. The solid-state spectra, however, preserve packing information of the semicrystalline polymer.

Quelle
Polymer Preprints 49

Seiten
734-735

DOI
http://oasys2.confex.com/acs/235nm/techprogram/P1151085.HTM

Erschienen am
April 2008
 
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