抄録
1. In a previous report, one of the authors* estimated the necessary activation energy E of the baking reation of resin finishing as approximately 16_??_18kcal/mol, based on data derived from commercial products. The activation energy E and frequency factor A of the reaction presented in this report are calculated by using our experimental measurements. For this purpose, we have made two series of experiments: a) baking of resin on clean glass plates, and b) baking of resin on cotton fabrics.
2. Our experimental results fully agreed with the following equation of unimolecular reaction: where a: Unreacted part of resin i.e. in 70°C water soluble part at z=0 by Kyeldhal method. a-x: do. at z=z (min.) k: Reaction velocity constant at temp. T°K z: Baking time (min.) z0: Waiting time (min.)
3. In all the experiments, the reaction velocity constant k fully agreed with the Ahrrenius equation: ln k=A+(-E/RT) where R: gas constant.
4. From the said results, the activation energy E and frequency factor A are culculated as follows: for series a) E 8.82kcal/mol, A 2, 178 10-1 min. for series b) E 18.85kcal/mol, A 1, 012 10-1 min.
5. We have further made cumulative baking at various temperatures and have found that experimental results agreed with the cumulative reaction equation:
6. We conclude from the great difference of the activation energy E in the above two series, that in series a) only reaction between resin components occurs, whereas in series b) reaction between resin components and cellulose predominates.
