SYNTHESIS AND CHARACTERIZATION OF IONIC-CONDUCTIVE POLYMERS HAVING SELF-ORGANIZATION
| Project/Area Number |
10650872
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
高分子合成
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| Research Institution | SCIENCE UNIVERSITY OF TOKYO |
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Principal Investigator |
KOIDE Naoyuki SCIENCE UNIV.OF TOKYO, CHEMISTRY, PROFESSOR, 理学部, 教授 (30084346)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | LIQUID CRYSTALLINE POLYMER / MESOPHASE / ION CONDUCTIVE POLYMER / POLYETHER / SMECTIC PHASE / NEMATIC PHASE / BISSTYRYLBENZENE / SELF-ORGANIZATION |
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| Research Abstract |
In order to clarify the relationship between liquid crystallinity and ionic conductivity, we synthesized side chain- and main chain liquid crystalline polymers containing ethyleneoxide chain in the polymer backbone. Side chain type polyethers were synthesized by ring opening polymerization of glycidyl ether with p-alkoxyphenyl moiety. A liquid crystalline phase was found at the alkoxy chain length of below 12. A smectic phase was induced for the mixture of the non-mesomorphic polythers with alkali metal salt, and the mesomorphic temperature range for the mixed system of the polyethers became wider with increasing amounts of alkali metal salt. These mixtures had an ionic conductivity. The ionic conductivity of the mesomorphic polyethers with alkali metal salt was larger than the non-mesomorphic polyethers with same alkali metal concentration in the whole measured temperature range. Activation energy of the smectic phase was larger than that of the isotropic phase region. The ionic conductivity of the liquid crystalline polyther with LiClOィイD24ィエD2 was 5.38x10ィイD1-6ィエD1ScmィイD1-1ィエD1 and that of the non-mesomorphic polyether was 4.57x10ィイD1-7ィエD1ScmィイD1-1ィエD1 at 100℃.
The main chain type liquid crystalline polymer composed with bisstyrylbenzene as a mesogen and oligo-oxyethylene blocks. The polymer with LiClOィイD24ィエD2 mixture (0.04) exhibited a smectic phase. However, the polymer with LiClOィイD24ィエD2 mixture (0.11) showed a nematic phase. The ionic conductivity of the polymer with LiClOィイD24ィエD2 mixture (0.11) was larger than that of the polymer with LiClOィイD24ィエD2 mixture (0.04). The polymer has a cis-trans isomerization by IィイD22ィエD2 doping or UV irradiation. The trans type polymer exhibited a mesophase, while the cis type polymer did not show any kind of mesophase. We found that the ionic conductivity of the trans type polymer was larger than that of the cis type polymer with LiClOィイD24ィエD2 mixture (0.11).
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Report
(3 results)
Research Products
(16 results)
