Effect of Resin on Friction Performance and Particle Emissions in Vehicle Polymer Brake Pads Composites

ABSTRACT Brake emissions that occur during braking in disc brakes cause significant environmental pollution, and the measurement of particulate matter (PM) emissions resulting from braking has gained importance in recent years. Resin is mainly used as a binding agent in brake pads. In this study, polymer brake pad samples with different resin amounts were developed. In addition to the braking performances, such as the density, friction coefficient, and wear rate of the brake pad samples, measurements were made at different disc rotation speeds and were performed on the PM mass density, PM number density, average PM size, and worn surfaces of the samples using a scanning electron microscope (SEM). The friction coefficient is between 0.3 and 0.4 in Resin 14–26 and between 0.25 and 0.4 in Resin 18–22. The particle size is larger at low disc speeds of 2 m/s and decreases when the speed increases to 4–6 m/s. The PM mass density was highest in PM10 at 2 m/s. The number density of PM0.5 was lowest at all speeds. The PM densities decreased with increasing resin ratio and disc speed. It is inevitable that optimum resin amounts will be used for vehicles used in different areas today and that PM rates will be effective.