Abstract
Ultraviolet absorption spectra of cellulose films irradiated by light of wavelengths of 2537 A and 1850 A were measured, and it was found that the irradiated sample by 2537 A showed a strong continuous absorption at the wevelength region below 2400 A, while the sample exposed to 1850 A exhibited an intense selective absorption having absorption maximum at 2600 A.
In order to petermine the chromophores thus formed on irradiation by these two spectral lines, the absorption spectra of these two kinds of irradiated samples were compared with those of three kinds of modified celluloses, i. e. hydrocellulose, aldehydic oxcellulose and carboxylic oxycellulose. As the result, it became clear that in the case of 1850 A irradiation, aldehyde groups are the primary product, while in the case of 2537 A irradiation carboxyl groups are mainly formed.
