https://scholars.lib.ntu.edu.tw/handle/123456789/410194
標題: | Synthesis of electrically conductive polypyrrole-polystyrene composites using supercritical carbon dioxide: I. Effects of the blending conditions | 作者: | Tang M. Wen T.-Y. Du T.-B. Chen Y.-P. |
關鍵字: | Conducting polymer blend;Polypyrrole;Polystyrene;Supercritical carbon dioxide | 公開日期: | 2003 | 卷: | 39 | 期: | 1 | 起(迄)頁: | 143 | 來源出版物: | European Polymer Journal | 摘要: | The electrical conductivity for a polymer composite consisting of polypyrrole (PPy) and an insulating host polystyrene (PS) is reported in this study. The host polymer was blended with pyrrole monomer using either supercritical carbon dioxide (SCCO2) or high-pressure liquid carbon dioxide (HPLCO2) as the carrying solvent. After the blending process, the blended host polymer was soaked in an oxidant solution. This process is compared with that of oxidant impregnation. With the same processing conditions, a polymer composite with much higher conductivity was obtained when the blending process was carried out before doping in an oxidant agent. Scanning electron microscope (SEM) and elemental analysis reveal that polymerization proceeded when the blended host polymer was soaking in the oxidant solution. It is observed that SCCO2 provides better conditions for blending the host polymer with pyrrole monomer than HPLCO2 at the same density. The maximum conductivity of the polymer composites also increases with temperature and pressure at the same SCCO2 density. ? 2002 Elsevier Science Ltd. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/410194 | ISSN: | 00143057 | DOI: | 10.1016/S0014-3057(02)00167-2 |
顯示於: | 化學工程學系 |
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