| 초록 |
Two kinds of carboxylated thermally reduced graphenes (C-TRGs) having different lateral sizes were examined as a Pickering stabilizer in the suspension polymerization of methyl methacrylate. The size and the shape of the prepared composite particles were irregular due to agglomeration, more evidently when the larger C-TRG was used. In addition, C-TRG was distributed not only on the surface but also inside the composite particles. It indicated that the C-TRG alone is not a stable Pickering agent. However, a very small dosage of acrylic acid remedied all these issues, because acrylic acid interacted with C-TRG and synergized the stabilizing effect. The compression molded composite of the core/shell poly(methyl methacrylate)/C-TRG particles exhibited a very low percolation threshold of electrical conductivity of 0.03 vol%. It demonstrated that the C-TRG shells of the composite particles effectively formed a segregated conductive network throughout the composite. |
