METHOD FOR MANUFACTURING ELECTROCONDUCTIVE POLYCARBONATE NANOCOMPOSITE HAVING CABON-BASED FILLER AND ELECTROCONDUCTIVE POLYCARBONATE NANOCOMPOSITE MANUFACTURED THEREBY

摘要

The present invention relates to a method for manufacturing an electroconductive polycarbonate nanocomposite material, comprising the steps of: (a) manufacturing a mixture of 90-99 wt% of a polycarbonate resin and 1-10 wt% of carbon black; (b) manufacturing a composite material composition by mixing 100 parts by weight of the mixture with 1-10 parts by weight of a polyester resin; (c) increasing conductivity of the composite material composition by inducing an ester exchange reaction to the polycarbonate resin and the polyester resin in the composite material composition manufactured in the step (b); and (d) molding the composite material composition obtained in the step (c). According to the present invention, the method for manufacturing an electroconductive polycarbonate nanocomposite material can manufacture a polycarbonate nanocomposite material which can be used for various purposes such as antistatic, electromagnetic wave shielding products, carrier tape, and the like, by adding a polyester resin to a mixture of a polycarbonate resin and carbon black and inducing an ester exchange reaction between polycarbonate and polyester, thereby ensuring electroconductivity. In particular, when polybutylene terephthalate (PBT) is included as a polyester resin, agglomerates of carbon black are destroyed due to high shear stress during injection molding, thereby minimizing a reduction in a conductive path in a composite material, and as a result, suppressing an increase in resistance due to injection molding.