Mid-IR spectroscopic studies

Previous mid-IR spectroscopic studies of polymer transitions, with the exception of Enns et al. (42), have used conventional dispersive instruments. One narrow range of the IR spectrum was observed by slowly scanning the frequency as the temperature was varied. Until recently this has been the optimal experimental instrumentation. However, with the advent of the fast Fourier transform algorithm, a new dimension has been added in the form of Fourier transform infrared (FTIR) spectroscopy. Application of this instrumentation to polymer systems has been the subject of recent reviews (58,59). Two texts offer a more in-depth survey of this technique in relation to conventional dispersive spectroscopy (60,61). 

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