Abstract
AbstractThe infrared spectrum of uniplanarly oriented valonia cellulose film and the polarized infrared spectra of doubly oriented films of ramie and bacterial cellulose crystallites have been observed in the region from 640 to 1700 cm.−1. The spectra have been interpreted with the assistance of band assignments in cellulose derivatives and related small molecules. Data obtained from deuterated material, band polarizations, and tilting effects have also been used. The perpendicular band at 1317 cm.−1 is assigned to the CH2 wagging mode. The highly parallel polarized band at 1162 cm.−1 is assigned to the antisymmetric bridge COC stretching frequency and the slightly parallel polarized band at 1110 cm.−1 is assigned to a ring stretching frequency. The interpretations of the other observed bands are discussed generally.
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