Study on Tensile Properties of Nylon 66 Reinforced Composites

Abstract

Nylon 66 is widely used in the vehicle interior, electronic parts and accessories. Nylon 66 as polymer material is added reinforce glass fiber to increase material properties. In parts forming process, injection mold method is widely used in polymer forming industry. In the study, the effects of injection molding process on the pseudo-static and high strain rate tensile properties of Nylon 66 composites are discussed. From the results, the tensile strength and Young's modulus increase with increasing the amount of glass fibers, but the elongation decreases with opposite trend. In high strain rate, the ultimate tensile stress, elongation of Nylon 66 composites increases with increasing strain rate apparently, while elongation is almost invariant for unreinforced Nylon 66. About fracture surface observation, the fibers in melt flow direction are broke and pulled out at quasi-static tensile test. And the fiber is breakage and the fibers are pull out from base material in melt flow direction are at high strain rate test. In this study, the results could provide nylon 66 composite properties for design application.