Abstract
Oxidative degradation of cellulose pulps, namely, thermo-mechanical pulp (TMP), softwood bleached sulfite pulp (NBSP), softwood bleached kraft pulp (NBKP), softwood unbleached kraft pulp (NUKP) and filter paper, was examined by mainly chemiluminescence (CL) and the following results were obtained. CL behavior of the examined pulps was extremely different from each other and the decreasing order of its intensity was as follows: TMP‹NBKP›NBSP‹NUKP›Filter paper. In the case of the bleached pulps; NBKP, NBSP and filter paper, the CL intensity increased with photo-irradiation time, but little changes in its intensity was observed in unbleached pulps; TMP and NUKP. From ultraviolet-visible spectra measurement, it was ascribed to the shielding and/or absorption of the emitted light by the colored materials in the pulps.
