Abstract
In the present paper, mechanical properties of the carbon-nano-fiber reinforced plastic are discussed. Two kinds of carbon-nano-fiber are employed for the filler of the composites, which are vapor grown carbon fiber (VGCF) and cupsstacked carbon nanofiber (CNF(CS)). For the matrix of the composites, four kinds of thermoplastic resin are used which are polypropylene (PP), polyamide (PA12) poly-buthylene-terephthalate (PBT) and poly-ether-ether-ketone (PEEK). 3-point bending test using short beams are executed to obtain the anisotropic properties of the specimens processed by injection molding. Standard tensile tests are executed to evaluate the stress-strain relation, tensile strength and elastic moduli of the composite materials. Furthermore, Mode I fracture toughness of the composite are evaluated using center-notched flexure specimens. These mechanical properties and characteristics for the specimens are compared and discussed in detail, and the mechanism of the fracture are investigated by scanning electron microscope (SEM).
