THE EFFECT OF LOADING AND LUBRICATION ON THE FRICTION COEFFICIENT OF HIGH-DENSITY POLYETHYLENE, POLYURETHANE, POLYTETRAFLUOROETHYLENE, AND POLYMETHYLMETHACRYLATE

• Main Author: Wisesa Wiranata, Akbar
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/72003
• Institution: Institut Teknologi Bandung

Tribology is the science that deals with surfaces that interact in relative motion with other surfaces. In this study, friction as one of subject in tribology and two of its parameters is investigated. Polymers material was chosen as the test sample of this research. This is because polymers are considered to have a lower coefficient of friction than metals, so they can be applied as tribological components. A low coefficient of friction can cause the friction force that arises to be smaller so that the energy wasted is minimal. The polymer samples used were high density polyethylene (HDPE), polyurethane (PU), polytetrafluoroethylene (PTFE), and polymethylmetacrylate (PMMA). The test is using a pin on disk test equipment by measuring the deflection of the pin arm when the pin and disk are rubbed. The material is tested as a disk component, and the quantity of the arm deflection is considered as the frictional force. The results of this test indicate that in the variation of loading, the friction coefficient of HDPE and Acrylic does not change, while PU and PTFE decrease with increasing load. In the lubrication variation test, the three samples (HDPE, PU, and Acrylic) showed a decrease in the coefficient of friction while PTFE did not.