Article
Structural Analysis of Spiropyran Polimers using ATR Spectroscopy
Autor
Rojas López, Marlon
Institución
Resumen
We have used infrared spectroscopy in attenuated total reflection (ATR)
mode to analyze the interactions between the polymeric base and solvent with a
photochromic material (spyropiran). We used cellulose acetate as polymeric base and
the spyropiran; 1,3,3 trimethyl indoline-5-nitro benzopyrane. Thin films with different
weight concentrations of SP were deposited in the polymeric base. The infrared
spectra show bands whose frequencies are associated to several molecular bondings. It
was observed a decreasing in intensity of absorbance for C=O stretching mode of the
acetate group at 1720 cm-1 and for C=C stretching mode for the main chain at 823 and
982 cm-1 both associated to the presence of SP in polymeric films.