Polymer Standards for Testing Fourier Transform Infrared Spectrometers.
Final rept. Mar 96-May 97,
IDAHO UNIV MOSCOW DEPT OF CHEMISTRY
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The use of commercially available stress relieved and extruded isotactic poly-propylene iPP samples was evaluated as a potential photometric standard for Fourier transform infrared FT-IR spectrometers. The parameters of polymer film dichroism, temperature sensitivity, sample thickness, and sample positioning were investigated as a function of spectral band position, width, and absorbance. The spectral band at 841 wavenumbers for iPP exhibited a Lorentzian band shape at spectral resolutions of 4 reciprocal centimeters or higher. This band allowed an experimental determination of spectrometer resolution at 4 reciprocal wavenumbers or lower with the iPP samples. The iPP samples also permitted evaluation of the spectrometer responsivity i.e., band height and position once the iPP film spectra were assessed as a function of polymer sample temperature.
- Physical Chemistry