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Thermal and FTIR Characterization of Poly (4-vinylpyridine) Crosslinked with Metal Salts
Final rept. Oct 2008-Jul 2009
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
Pagination or Media Count:
We investigated the physical properties and degree of crosslinking of poly 4-vinylpyridine P4VP blended with transition metal salts using differential scanning calorimetry DSC and thermal gravimetric analysis TGA. The glass transition temperature Tg of the blends increased significantly upon addition of zinc Zn and copper II Cu salts. Tg enhancement was found to be highly dependent upon the type and loading of the metal salt. A maximum increase of 70 degrees C was observed at 0.25 molar equivalents of Zn cation. Ash content from TGA was highest for the 0.25 zinc salt loading, indicating that the maximum amount of metal ion was incorporated into the polymer at this concentration. Fourier transform infrared spectroscopy FTIR provided confirmation that transition metal coordination between the Zn cation and the pyridine nitrogens occured, and allowed for the quantification of pyridine binding.
APPROVED FOR PUBLIC RELEASE