| Abstract: | SUMMARIES. Kinetics of acid hydrolysis of cellulose described by the Ekenstam equation was studied using some samples of lignin-free paper. The dependence of rate constant vs. RH has been determined at 90°C. The resulting plot was quite similar to those obtained by Zou and used by him to elaborate the model of cellulose degradation. In our case, however, degradation was slower due to the different material studied. The methodology of measurements was discussed. Most attention was given to the method of maintaining a constant value of the relative humidity. It was found that it was safe to use the saturated solutions of salts consisting of an alkali metal and a halogen ion. Deposits of these salts on the cellulose did not affect its degradation rate, in contrast to magnesium chloride, which sig-nificandy accelerated the degradation process. |
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