A New Challenge of Polymer Thermoelectric Materials as Ecomaterials |
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| Journal | Materials Science Forum (Volumes 539 - 543) |
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| Volume | THERMEC 2006 |
| Edited by | T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran |
| Pages | 2329-2332 |
| DOI | 10.4028/www.scientific.net/MSF.539-543.2329 |
| Citation | Yoshikazu Shinohara et al., 2007, Materials Science Forum, 539-543, 2329 |
| Online since | March, 2007 |
| Authors | Yoshikazu Shinohara, Yoshio Imai, Yukihiro Isoda, Kentaro Hiraishi, Hachiro Nakanishi |
| Keywords | Electrolytic Polymerization, Oxidative Polymerization, Polymer, Polythiophene, Side Chain, Thermoelectric Material |
| Abstract | Typical conductive polymers of poly(3-alkylthiophenes) were synthesized by oxidative polymerization. Polythiophene with no side chain was also electrolyticaly polymerized. Alkyl side chains were CnH2n+1 with n=4, 6, 8, 12. The regioregularity with the HT linkage was larger than 99% based on NMR analysis. We have evaluated the effect of side chain size on the thermoelectric properties of Seebeck coefficient and electrical conductivity. The results were as follows: 1) Seebeck coefficient decreased with an increasing electrical conductivity. 2) High Seebeck coefficient >1mV/K was observed at low electrical conductivity <10-2S/cm. 3) Small side chains, especially no side chain caused higher thermoelectric properties of polythiophene series. |
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