材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
論文
クロロスルホン化ポリエチレンゴムの疲労強度と粘弾性特性の温度劣化挙動
成瀬 友博服部 敏雄山口 幸宏金井 哲也関谷 太志
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2005 年 54 巻 3 号 p. 290-295

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Chlorosulfonated polyethylene rubber (CSM) is used in tubes and wire covers among many other uses. Generally, rubber shows considerable changes in mechanical properties over time and in temperature. To confirm the reliability of these products, we must evaluate how they degrade in humidity, sunlight, and under thermal loading. We therefore studied the thermally degrading properties of CSM. We first measured thermal reduction of the elongation and of the fatigue strength of CSM. To evaluate these degrading properties, we used the Arrhenius's equation to confirm the relationship between the temperature and the time. Using these evaluation methods we can predict thermal reduction of fatigue strength taking temperature and exposure time into account. The time-temperature shift factor of thermal degradation of the elongation agrees well with that of the fatigue strength. Viscoelastic behavior of virgin CSM and that of thermally degraded one were evaluated. Arrhenius's equation was found to describe the temperature dependence of thermal degradation of complex modulus. The time-temperature shift factor of thermal degradation of a complex modulus does not agree with that of elongation and fatigue strength.

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© 2005 日本材料学会
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