Effect of Modified MgO Whisker on Mechanical and Tribological Properties of Oil-Impregnated Monomer Casting Nylon

Abstract

The magnesium oxide whisker was commonly used as reinforcement for polymer. In this study, magnesium oxide whisker was firstly modified by γ-aminopropyl triethoxysilane and n-octadecylamine activated by N,N'-carbonyldiimidazole. Then the modified magnesium oxide whisker was introduced into oil-impregnated monomer casting nylon. The final composite was obtained by in situ polymerization. The mechanical and tribological properties of composite with different contents of modified magnesium oxide whisker were investigated. The results showed that the mechanical and tribological performances of the composites were observably improved by growth of tensile strength, flexural strength, elongation at break, and impact strength. The tribological test results indicated that reduction in the frictional coefficient and the abrasion loss was achieved. The surface lipophilicity of composites obviously increased also. This work provided a simple method for designing composites with excellent mechanical and frictional properties which may greatly broaden the application potential of composites.