Fourier transform morphological measurements

The apparatus used for IR microscopy is a Fourier-transform infrared (FTIR) spectrometer coupled on-line with an optical microscope. The microscope serves to observe the sample in white light at significant magnification for the purpose of determining its morphology, as well as to select the area for analysis. The spectrometer, on the other hand, enables study of the sample by transmission or reflection measurement for the purpose of determining the chemical composition. It also provides information about the microstructure and optical properties (orientation) of the sample. It is possible to apply polarised light both in the observation of the sample and in spectrometric measurements. 

Lin et al. [36] used Fourier transform infrared spectroscopy (FTIR) and dialysis in conjunction with conductivity measurements to study the influence of the LiCl stabilizer on the morphology of FBI in DMAc solutions ([FBI] = 2.0 mg mL- and [LiCl]/[Bl] = 3.63-14.51 M ratio or [LiCl]/[FBl] = 0.5-2.0 by weight ratio). It was demonstrated that interpolymer hydrogen bonding was developed via the -N-H- N=C- interaction for FBI in DMAc solutions (Fig. 12.10). On the basis of the dialysis measurements, it was shown that the -N-H N=C- hydrogen bonds were disrupted... 

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