せん断力によるブレーキ材料用フェノール樹脂硬化物の分解 : 第2報, 金属粉の影響

抄録

In order to examine the effect that metal powder used as an automotive brake lining exerts on fade resistance, shearing force was applied to the cured phenolic resin powder, to which various kinds of metal powder were added. Thereafter, solvent extraction was carried out, and the molecular weight distribution of the extracts was measured. Moreover, the fade resistance of the friction pads, to which various kinds of metal powder were added, was measured with a braking device dynamometer for test pieces. As the results in the mechanochemical degradation of cured phenolic resin due to shearing force, it was found that metal powder had the catalytic action to decrease the average molecular weight of the degradation products. In addition, it was found that this catalytic action differed according to the kinds of metal powder, and there was correlation between the order of these catalytic actions and the order of the fade resistances of the friction pads using respective kinds of metal powder.