Tribological Properties of Carbon Black Filled Nitrile Rubber for Seal Applications
Young Seok Lee1 and Ki Ryong Ha2
1Jinyang Oil Seal Co., Ltd., 17-24, Secheon-ro 7-gil, Daegu 42921, Republic of Korea; 2Department of Chemical Engineering, Keimyung University, Daegu 42601, Republic of Korea
Abstract: Tribological properties of rubber are one critical factor, which directly influences the service life and performance of radial lip seals. In general, a radial lip seal is composed of a nitrile rubber. Therefore, a tribological study of nitrile rubber is essential to developing a rubber for radial lip seals. The aim of this work is to obtain a better understanding of the correlation between mechanical and tribological properties of nitrile rubber due to the acrylonitrile (ACN) content. The coefficient of friction (COF) and wear behavior of the nitrile rubber were investigated by tribo-tester. The dynamic properties and mechanical properties of rubber were examined by dynamic mechanical analysis (DMA) and universal testing machine (UTM), respectively. From the results, it can be observed that 100% modulus, tear strength and tan δ are all associated with COF and wear behavior of the nitrile rubbers. Those properties are affected by the ACN content of the nitrile rubber. Consequently, the ACN content is one of important factors which affect tribological properties of the nitrile rubber.
Keywords: Nitrile rubber, Acrylonitrile, Tribological properties, Mechanical properties, Dynamic mechanical analysis (DMA).