Abstract
Based on our experimental data on the polarized IR spectra of the oriented fiber of cellulose nitrate (CN), the IR spectra of15N CN, and its structural data published earlier, we have revised the interpretation of the IR spectrum of CN and give a more specific interpretation. We established a relationship between the form of vibration bands of the nitrate groups and their position and conformation state in the glucopyranose cycle of CN. The relative intensities of the valence vibration bands of the CH2 groups are explained by the Fermi resonance with a complex tone of valence vibrations of the nitrate groups. In view of the strong dichroism of some low-frequency bands in the IR spectrum of CN, we offer assignments of these bands to vibrations of the chain skeleton and suggest the rationale for the high orientation of CN macromolecules both in the ordered and disordered regions. Such an orientation is assumed to be “inherited” by CN from the starting cellulose.
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Kazan Chemical Engineering Institute. Translated fromZhurnal Strukturnoi Khimii, Vol. 34, No. 4, pp. 59–66, July–August, 1993.
Translated by L. Smolina
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Kovalenko, V.I., Mukhamadeeva, R.M., Maklakova, L.N. et al. Interpretation of the IR spectrum and structure of cellulose nitrate. J Struct Chem 34, 540–547 (1994). https://doi.org/10.1007/BF00753522
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DOI: https://doi.org/10.1007/BF00753522