シリカ配合およびカーボン配合SBRの摩耗機構に関する研究

抄録

Wear properties of silica-filled SBR and three kinds of carbon black-filled SBRs were investigated. The wear volume of rubber was measured when rubber specimens were rubbed against metal gauze using a pin-on-cylinder type tribometer.
The coefficient of friction consists of adhesion component of friction, μ_A and hysteresis component of friction, μ_H. The adhesion component of friction is given by μ_A=A·s/W, where A is contact area, s is shear strength, W is applied load. It is thought that the wear volume depends on friction energy dissipated.
In this paper the wear volume per unit friction energy K/μ_A was compared with the energy density at break U. It is found that K/μ_A and 1/U showed linear correlation for the carbon black-filled SBRs, while the silica-filled SBR showed higher K/μ_A value compared to that of the carbon black-filled SBRs.