Effect of Processing Parameters on Electrical Properties of Electrically Conductive Composites

摘要

The effect of injection molding parameters on electrical resistance and electromagnetic interference (EMI) shielding was examined for two commercially available grades of electrically conductive polycarbonate/acrylonitrile butadiene styrene (PC/ABS). A Box-Behnken design of experiments (DOE) was utilized for the variables of mold temperature, barrel temperature and back pressure. Surface resistance was measured to evaluate electrical conductivity. International Electrical and Electronics Engineers (IEEE) test method 299 was used to evaluate shielding effectiveness. Neither EMI shielding or surface resistance was changed in a significant way over the processing condition examined. A very weak trend is seen for one of the materials with mold temperature.