Preparation and friction properties of silicone rubber composites

Abstract

Effects of silica and hydroxyl silicone oil on the friction properties of silicone rubber composites were investigated, and the influencing factors and friction mechanism of silicone rubber composites on dry and wet smooth glass surfaces were studied. The results showed that the dry friction coefficient (fD) of silicone rubber composites on smooth glass surfaces was linearly positive with loss factor (tan δ)/Shore A hardness (H), tan δ/shear storage modulus (G′), fD decreased with increasing silica amount. When the amount of plasticizer was less than 7.5 phr and H was no less than 34, fD of the silicone rubber composite had a linear positive correlation with tan δ/H and tan δ/G′. When the amount of plasticizer was no less than 7.5 phr and H was less than 34, the tan δ at a maximum strain of 42% had a linear positive correlation with fD. On a water-lubricated smooth glass surface, the wet friction coefficient of silicone rubber composites was positively correlated with tan δ.

Keywords

• silicone rubber
• dry friction
• wet friction
• silica
• hydroxyl siliconeoil
• shear modulus
• loss factor