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 degrees C and 60 degrees C. The glass transition temperature, T-g of the PN vulcanizate was 15 degrees 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.