With the use of Fourier Transform Infrared (FTIR) analysis applied to methylcellulose (MC) films, the hydrogen bonding formation between MC‐MC molecules and between MC and a series of different‐molecular‐weight PEGs was studied. The spectra of the films were interpreted in terms of the symmetry distortion of hydroxyl stretch at 3466.5 cm ‐1 , which is the measure of hydrogen bonding interactions in the polymer matrix. The symmetry distortion was determined to be affected by the MC concentration, indicating the presence of intra‐ and intermolecular hydrogen bonding between MC molecules. Neither ethanol nor its concentration influenced the symmetry distortion. A competition for hydrogen bonding via hydroxyl groups between MC‐MC and MC‐PEG occurred when PEG was incorporated into the polymer matrix.
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Turhan et al. (2001) studied this question.
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