Increasing the thennal and electrical conductivity of typically insulating poly- ners. such as nylon 6.6. opens new markets. A thennally conductive resin can be Ised for heat sink applications. An electrically conductive resin can be used in ;tatic dissipative and Electromagnetic Interference/Radio Frequency Interference ;hielding applications. This research focused on performing compounding runs ollowed by injection molding and testing (tensile properties. volumetric electrical "esistivity .and through-plane thennal conductivity) of carbon filled nylon 6.6. The our carbon fillers investigated included a PAN-based carbon fiber (milled. 200IJ. ong). an electrically conductive carbon black. vapor grown graphitic nanotubes. and rhennocarb (high quality synthetic milled graphite). Fonnulations were produced md tested that contained varying amounts of a single carbon filler. Combinations )f fillers were also investigated via conducting half of a 24 factorial design. It was letennined that Thennocarb has the largest effect on the thennal conductivity . ncreasing Thennocarb increases thennal conductivity. For conductive resins con- aining only a single filler type. nanotubes caused the electrical resistivity (ER) to lecrease the most. For the half fraction factorial design fonnulations"that contain at east one filler type at the higher level. the ER of the conductive resin ranged from0.1 to 0.3 ohm-cm.
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