Interfacial and Mechanical Properties of Carbon Fiber Reinforced Polycarbonate (PC) Film and PC Fiber Impregnated Composites

다국어 초록 (Multilingual Abstract)

Currently, continuous polymer fibers are usually manufactured in versatile forms such as, aramid fiber. In thisstudy, continuous polycarbonate (PC) fiber having the uniform diameter was manufactured from a thermoplastic PC resinusing a twin screw extruder. Carbon nanotubes (CNTs) were uniformly dispersed in the PC resin, using a solvent dispersionmethod. The effect of CNT on the mechanical properties of PC fiber was analyzed statistically, using Weibull distribution, bysingle PC fiber tensile test. Dynamic contact angle was measured to compare the surface energies of PC fiber and PC-CNTfiber on the water droplet. The difference in the wetting patterns was also observed by injecting a solvent between two fibers.
Tensile strength and Young’s modulus of the PC fiber was significantly increased by the addition of even a small amount ofCNT. This improvement can be attributed to the excellent reinforcing and stress transferring effects of the CNT filler.
Composites were made of both types of PC film and PC fiber as a matrix and their impregnation properties were investigatedby inspection of photographs of their cross-sections. The mechanical properties of the two-types of composites were alsocompared by tensile testing. From the cross-sectional fractography and the permeated PC weight, PC fiber type exhibitedbetter impregnation property than the PC film type, and thus resulted in the improved tensile strength.

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