In this study in situ Synthesis of PE-Cu-C nano-crystalline composite by mechanochemical technique have been studied. High energy planetary ball milling was used to synthesis of PE-Cu-C nano-crystalline composite. Polyethylene, CuO and graphite powders were used in synthesis of final composite. The mixture of powders was examined in various milling condition to synthesis of final nano-crystalline composite. In order to observe the formation of nano-crystalline particles during milling, the as-milled powder was characterized by X-ray diffraction (XRD). Differential thermal analysis (DTA) and thermogravimetry analysis (TGA) was used to heat analysis and scanning electron microscopy (SEM) was used to investigate the dispersion of Cu particles in the matrix. Nano-crystalline copper was synthesized through solid state reduction of CuO by graphite. As a result of the formation of nano-crystalline metal phase in the polyethylene matrix, special properties was obtained in the final composite. Addition of metal particles cause to improve mechanical and physical properties such as electrical conductivity, heat conductivity, high temperature resistance and shielding effect of polyethylene matrix.

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