纎維素の光化學(第1報)

Abstract

In the course of the study on the photochemistry of cellulose, the absorption spectrum of cellulose-film was first measured. And it was found that the film represented very strong absorption in the wave length region below 2000Å, in contrast to the weak absorption band between 4000 and 2000Å. The effect of time of illumination was then preliminarily observed in order to know the behavior of cellulose to ultraviolet rays. From this observation, it became clear that cellulose suffered degradation by ultraviolet rays of quartz mercury arc lamp, the degree of polymerization showing a marked fall. Comparing the characteristic curves of photodegradation of cellulose-film and -fiber with those brought about by acid hydrolysis, it was suggested that the rate of photodegradation depended upon the fine structure of the cellulose material.