Changes in IR spectra of polysaccharides induced by CW CO_(2)-laser radiation

摘要

By IR spectroscopy methods the structural changes of high molecular polymers irradiated by CW CO_(2)-laser radiation was investigated. Some changes in the structural sensitive regions at 1250-950 and 950-850 cm~(-1) of the IR spectra of the investigated polysaccharides (pullulan (molecular mass of 14500) and microcrystalline cellulose (structural modifications I and II)) were exhibit. These changes indicated that the degree of conformational order of polysaccharide molecules increases under the laser irradiation, while its structural order always decreases as a result of heating by traditional thermal sources.