Abstract
AbstractElectrically and thermally conductive resins can be produced by adding conductive fillers to insulating polymers. Mechanical properties such as tensile modulus, ultimate tensile strength, strain at ultimate tensile strength, and notched Izod impact strength are also important and cannot be ignored. This research focused on performing compounding runs followed by injection molding and tensile and impact property testing of carbon filled nylon 6,6 and polycarbonate based resins. The three carbon fillers investigated included an electrically conductive carbon black, synthetic graphite particles, and a milled pitch based carbon fiber. For each polymer, resins were produced and tested that contained varying amounts of these single carbon fillers. In addition, combinations of fillers were investigated by conducting a full 23 factorial design and a complete replicate in each polymer. The objective of this paper was to determine the effects and interactions of each filler on the tensile and impact properties. The results showed that, in many cases, combining two and three different fillers caused a statistically significant effect at the 95% confidence level. Polym. Compos. 25:172–185, 2004. © 2004 Society of Plastics Engineers.
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