EFFECT OF CARBON FIBER CONTENT ON PROPERTY OF REINFORCED NYLON COMPOSITE

Abstract

Abstract: Carbon fiber can improve the mechanical properties of engineering plastics. This paper studies the effect of carbon fiber content on the properties and reinforced efficiency of carbon fiber reinforced nylon 66 (CF/PA66) composites, and analyzes the reasons for its enhancement. The CF/PA66 tensile specimens with fiber fraction of 10wt% to 40wt% were prepared by injection molding process. The elastic modulus and tensile strength of the reinforced composites were obtained through experiments and compared with the unreinforced samples. The effect of carbon fiber content on fiber-reinforced efficiency was analyzed. The fracture surface of tensile specimens was observed by scanning electron microscopy (SEM). The results show that the elastic modulus of CF/PA66 increases with the increase of fiber content, the tensile strength increases first and then decreases, and the peak value appears when the fiber content is 30wt%; the fiber-reinforced efficiency of CF/PA66 composites is not affected by carbon fiber content. The high fiber content of carbon fiber has lower tensile strength enhancement of CF/PA66 composites. The main reason is the weakening of micro-interface strength and the interface defect caused by the increase of fiber contact probability under high fiber content. The effect of the carbon fiber content studied on the reinforcing properties and efficiency of carbon fiber/PA66 materials can provide guidance for the design of reinforced composite materials.

Key words: carbon fiber, nylon 66, mechanical property, reinforced efficiency, microstructure

CLC Number:

TB332

CHEN Yi, HUANG Zhen-yuan, LIU Ying, LIU Qiang. EFFECT OF CARBON FIBER CONTENT ON PROPERTY OF REINFORCED NYLON COMPOSITE[J]. Fiber Reinforced Plastics/Composites, 2019, 0(9): 64-68.

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