Friction and wear of rubber compounds containing powdered polynorbornene vulcanizate

An investigation on the frictional performance of a natural rubber compound containing polynorbornene (PN) vulcanizate powder was carried out at various temperatures between -20°C and 60°C. The glass transition temperature, T_g, of the PN vulcanizate was 15°C. At temperatures below its T_g, the frictional coefficient of the composite significantly increased to the extent of 10% with a 10 phr addition of PN vulcanizate powder, while the wear rates were not greatly affected. The wear behavior of the composite was strongly dependent on the frictional work input.