4Zheng Wenge, Lu Xuehong, Wong Shingchong.Electrical and mechanical properties of expanded graphite-reinforced high- density polyethylene [J] .J Appl Poly Sci, 2004, 91 (5): 2781-2788.
5Omastova M, Kosina S, Pionteck J, et al.Electrical properties and stability of polypyrrole containing conducting polymer composites [J] .Synthetic Metals, 1996, 81 (4) : 49-57.