A COMPARISON ON THE MECHANICAL PROPERTIES OF UNIDIRECTIONAL CARBON FIBER REINFORCED COMPOSITES BETWEEN THERMOPLASTIC AND THERMOSETTING RESINS

摘要

This paper reports the database of mechanical properties of unidirectional carbon fiber reinforced plastic composites. The unidirectional carbon fiber prepregs which made through hot melt process were used as reinforcement and both polyamind6 (PA6) and epoxy were used as matrix to make CFRP boards through compression process. The mechanical and interfacial properties of 0 and 90 degree CFRP composites were investigated by tensile test and fractured surface observation. Fracture toughness was investigated by compact tension test. For 0 degree samples, the strength and modulus of CF/Epoxy exhibited more excellent properties than CF/PA6. For 90 degree samples, they revealed similar result with 0 degree specimens. Meanwhile, with the increasing times of tensile test, the modulus decreased and the strength increased. At same time, the stability of adhesion between fiber and matrix of CF/Epoxy 90 degree CFRP composites is better than CF/PA6 ones and it can be improved by Scanning Electron Microscopy (SEM). The ability of CF/PA6 CFRP composites containing a crack to resist fracture was excellent than CF/Epoxy CFRP composites.