Viscoelastic Properties at High Frequency and Wet Friction Behaviour of Carbon Black and Silica Filled Rubber Compounds

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  • カーボンブラックおよびシリカ充填ゴム組成物の高周波領域における粘弾性挙動と湿潤摩擦特性
  • カーボン ブラック オヨビ シリカ ジュウテン ゴム ソセイブツ ノ コウシュウハ リョウイキ ニ オケル ネンダンセイ キョドウ ト シツジュン マサツ トクセイ

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In this paper, a viscoelastic measuring method at a high frequency range for rubber compounds was proposed by using ultrasonic waves. Viscoelastic properties estimated by the present method were compared with those measured by the conventional dynamic viscoelastic method in conjunction with the frequency-temperature transformation principal for several rubber compounds containing either carbon black or silica particles. An appreciable difference can be identified between two methods. The reason for the discrepancy between these two methods was deduced due to the amplitude dependence of rubbers containing micro particles such as carbon black and silica. Furthermore, it is indicated that the maximum friction coefficient (Max-μ) of rubber compounds at wet condition could be estimated correctly by measuring tan δ of ultrasonic waves. Thus, it is shown that the ultrasonic viscoelasticity is beneficial one for estimating frictional characteristics and clarifying the mechanical behaviour of rubber compounds at a high frequency range.

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