IMPACT PROPERTIES AND SYNERGISTIC EFFECT OF NYLON 6 BASED COMPOSITES

Abstract

Abstract: This paper studies the effect of different reinforcements on the impact properties and synergistic reinforcement of nylon 6 composites, and analyzes the reasons for its enhancement. The binary, ternary and quaternary nylon 6 (PA6) matrix composites were fabricated by melt-extrusion, anodic oxidation and hot pressing method. The fracture morphologies of multi-scale reinforcement reinforced PA6 matrix composites under impact stress were characterized by FESEM. The impact properties and reinforcement mechanisms of inorganic particles (IP), carbon fibers(CF) and metal-reinforced nylon 6 composites were studied. The results show that: ① There is a certain synergistic effect in inorganic particle and carbon fiber multi-scale co-reinforced PA6 matrix composites, which can significantly improve the impact properties of the composites. The impact strength of GB, CF, and metal co-reinforced PA6 composite reaches 94.7 kJ/m². ② Micron-sized glass beads (micro GB)debond under impact stress, which deflected and pinned the crack propagation. ③ Nano CaCO₃ debonds under impact stress and produces the micro-cracks and crazes, which help the reinforcement of the glass beads and carbon fibers. ④ The failure modes of fiber metal laminate under impact stress are the debonding, fracture and pull-out of fiber, tensile fracture of the matrix, the plastic deformation, fracture and oxide layer cracking of the metals, and the interfacial debonding of the metal to substrate.

Key words: inorganic particles, carbon fiber, nylon 6 matrix composites, anodize, impact property

CLC Number:

TB332

LI Yan, YIN Hong-feng, QIN Yue, YANG Shun. IMPACT PROPERTIES AND SYNERGISTIC EFFECT OF NYLON 6 BASED COMPOSITES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2020, 0(12): 84-91.

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