Quiz IR Spectroscopy
Quiz IR Spectroscopy
1) Sketch a dispersive IR instrument and a Fourier Transform IR instrument. What is the difference between these instruments? (Explain what an interferometer is.)
2) What is Fellgett’s advantage? (Why is FT not used for visible UV spectra?)
What is Jacquinot’s Throughput Advantage?
3) Sketch the IR absorption spectra from polystyrene, polycarbonate, polymethylmethacrylate, nylon, polybutadiene that is predominantly cis, and polybutadiene that is predominantly trans. Identify all absorption bands.
4) What is the difference in sensitivity for absorption bands for IR and Raman? Sketch the IR and Raman spectra for polybutadiene and for nylon.
5) What are Stokes and Anti-Stokes lines?
6) Explain how IR and Raman can be used to distinguish between different triad tacticities in polymers such as PMMA (you will need to explain what triad tacticity means).
7) Explain the difference between the IR and Raman spectra for nylon and for polybutadiene. Identify all absorption bands.
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