Research on Static Viscoelastic and Tribological Properties of PP-EPDM, PP-GF30 and ABS in Automobile

Abstract

To establish the relationship between the static viscoelastic and the tribological properties, creep and friction experiments were performed on PP-EPDM, PP-GF30 and ABS through a UMT-II multi-functional micro-friction test machine. Results showed that PP-EPDM has the smallest creep rate and the better dimensional stability. This was related to the more complicated internal net structure, and the local slip and diffusion were more difficult than PP-GF30 and ABS under load. The Simulation Study of Burgers model founded that the viscosity coefficients of PP-EPDM was the smallest and the stiffness coefficient was the biggest, which exhibited a more apparent viscosity performance. The friction coefficient and wear depth of PP-EPDM were smaller than those of PP-GF30 and ABS, therefore, it has better wear resistance. Higher viscosity performance is favourable for friction coefficient improvement, and this goes against improving the wear resistance. Under the same conditions, PP-EPDM will be a better choice.