天然ゴムの素練りによるハイドロパーオキサイドの生成およびそれによるスチレンの重合

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The present paper describes about determination of hydroperoxide in rubber, correlation between molecular weight of rubber and the hydroperoxide, and polymerization of styrene caused by the hydroperoxide.Mastication of rubber was carried out in the range of temperature from 30°C to 170°C. The concentration of detected hydroperoxide in rubber changed largely according to mastication temperature. The highest amount of the hydroperoxide was found to be both at 30°C and at 140°C. It was assumed that total hydroperoxide [PO] consist of hydroperoxide consumed for rubber degradation [S-PO] and that remained and detected in rubber by analysis [I-PO]. As the results, it was found that the concentration of [I-PO] was nearly zero with the lapse of time of mastication at mastication temperature i.e. 170°C, while number of scission of rubber molecule increased. It was also found that [I-PO] increased with the lapse of time of mastication at room temperature and both [I-PO] and number of scission increased with the time at 140°C.It was also found that as the hydroperoxide increased, polymerization of styrene was accelerated.By means of ultrared absorption spectrum, absorption bands of carbonyl and that of hydroxide were recognized over 100°C in mastication temperature.
日本ゴム協会の論文