Accelerated oxidation of cotton cellulose in presence of reducing substances-Part II

Abstract

1. The relation between pH of sodium hypochlorite solutions and the amount of oxygen consumed at 30°C. by cotton in presence of ferrous hydroxide and a number of vat dyes belonging to different chemical structural groups, is determined. 2. It is found that the reduced substances do not show uniform behaviour. The rate of oxygen uptake, the amount of oxygen transferred and the pH of maximum oxygen uptake by the cellulose substrate, are dependent on the individual reducing substance present on the fibre during the hypochlorite treatment. 3. At 30°C., there exists no similarity between the pH-corrected oxidation potentials curve and the curve showing relation between pH and oxygen uptake or fluidity. 4. The corrected oxidation potentials as obtained by applying a correction of 0.06×pH volts to the measured value of the potentials is not a measure of the oxidising intensity of hypochlorite solutions.