Abstract
This article presents the results of the first application of dynamic mechanical analysis (DMA) coupled with 2D step‐scan Fourier transform infrared (FTIR) spectroscopy, to cellulose. It is demonstrated that the broad hydroxyl infrared absorption band between 3700 and 3000 cm−1 in the cellulose infrared spectra could be separated into distinct bands by this dynamic rheo‐optical investigation using FTIR‐spectroscopy as detecting system. The responses of the OH‐groups to an external perturbation were recorded as in‐phase and out‐of‐phase spectra. The cross correlation of these spectra gave the 2D synchronous and asynchronous plots, which showed clearly separated bands in the OH‐vibration range and the relation of the OH‐groups to each other. It is demonstrated that it is possible to establish relations between the OH‐bands and the cellulose structure.
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