加硫ゴムの劣化の化学レオロジ-的研究〔加硫ゴムの劣化反応機構の定量的研究-3-〕

概要

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The quantitative studies of degradation mechanism of DCP cured natural rubber vulcanizates were carried out by the method of stress relaxation. The experimental results were obtained under the conditions of different atmospheres and different temperatures ranging from 30°C to 200°C with irradiation of ultra-violet rays.The causes of degradation were classified into four elements of heat, light heat-oxidation, and light-oxidation, and the degrees of these elements contributing to the degradation were quantitatively measured.The degradation reaction by ultra-violet light was approximately independent of temperatures in nitrogen. That in air was accelerated by increasing the temperature, and the rate of degradation due to light and oxygen was increased in the region of higher temperatures than in that of lower ones.
日本ゴム協会の論文