Estimation of Cellulose Crystallinity Using Fourier Transform-Infrared Spectroscopy and Dynamic Thermogravimetry

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Abstract
Dynamic thermogravimetry (tga), differential thermogravimetry (dtg), and Fourier Transform-Infrared Spectroscopy (FT-IR) were performed on a variety of celluloses with different cyr3tallinities. The data were compared to the crystallinlty indices (C.I.) determined by X-ray diffraction. Highly significant correlations (99.9%) included: a positive linear correlation of the maximum dtg value; a logarithmic relation of the temperature at which the initial 10% weight loss occurred; and a linear relationship of three FT-IR absorbance ratios (1108/1091 cm−1), (1430/1403 cm−1), and (1459/1403 cm−1). A significant logarithmic correlation was also found for the temperature at maximum dtg for cotton linter samples. These relationships are discussed.