Study On Properties Of Glass Fiber Reinforced Polyamide6Composites

In this paper, glass fiber (GF) reinforced polyamide6(PA6) composites were prepared by blending long GF and short GF respectively with PA6. The effects of GF content, type of glass fiber and processing parameter on mechanical properties of composite materials were investigated. The morphology of glass fiber in composites and the fracture surface in impact and tensile test were observed by scanning electronic microscopy. The results showed that the mechanical properties of composites increased with the glass fiber content. With the increase of glass content, the composites impact strength, elastic modulus, yield stress, flexural strength are getting higher and higher, When the glass fiber content is35%, impact strength can reach75.5J/m. When the glass content is40%, elastic modulus of composites can reach2836MPa, while the yield stress can reach114MPa, which has greatly improved mechanical properties compared to pure PA6resin. At the same time with the glass fiber content increased, elongation at break decreased, the elongation at break dropped down. The increase of screw speed at constant feeding rate improved the mechanical properties of composites. When the screw speed is230r/min, impact strength, elastic modulus, yield stress and bending strength reach the maximum; But the increase of feeding rate at constant screw speed deteriorated the mechanical properties. When the feed rate is14r/min, impact strength, elastic modulus have a smaller value. The feeding position of long continuous glass fiber showed some effect on the properties of composites. The mechanical properties of composites prepared from long continuous glass fiber was better than those from short glass fiber. We also investigated glass fiber reinforced composite melt volume flow rate with a glass content of trend with the increase of glass content, the melt volume flow rate showing decreasing trend, long glass fiber and short glass fiber reinforced composite material there are some differences. Meanwhile, the trend of the melt index of the composite materials with glass fiber content was also investigated. With the increase of glass content, the melt index decreased. The result of properties showed some differences between long glass fiber and short glass fiber reinforced composites.