1989 Fiscal Year Final Research Report Summary
Electric Birefringence Relaxation Spectroscopy of Electroactive Polymer Solutions
| Project/Area Number |
63460067
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
応用物理学一般(含航海学)
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| Research Institution | University of Tokyo |
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Principal Investigator |
HAYAKAWA Reinosuke Univ.Tokyo, Fac.Engineering, Prof., 工学部, 教授 (00011106)
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| Co-Investigator(Kenkyū-buntansha) |
TERAOKA Iwao Univ.Tokyo, Fac.Engineering, Assistant, 工学部, 助手 (60188662)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Conjugated Electron System / Electroactive Polymers / Electric Birefringence Relaxation Spectroscopy / Semiconductor Laser / Polydiacetylene / Polythiophene |
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| Research Abstract |
It is difficult to measure the electric birefringence relaxation of solutions of electroactive polymers with conjugated electrons by using a visible light source such as a He-Ne laser or Ar ion laser, because such polymers usually have strong absorption bands in visible light range. In this study, by utilizing a high-power semiconductor laser as a near-infrared light source, we have developed a high-accuracy, broadband electric birefringence relaxation spectrometer which enables us to detect a total profile of relaxational spectra of the polymers in a very short time. The results obtained are as follows.
1. A semiconductor laser light source system with high stability and high power has been developed. By combining this light source with a high-speed, high-resolution transient memory and a personal computer, we have realized a high-accuracy realtime electric birefringence relaxation spectrometer.
2. By use of this spectrometer, we have measured the electric birefringence relaxation spectra of typical electroactive polymers such as polydiacetylene and polythiophene in good and poor solvents, and obtained information on the polymer conformation (rodlike or randomly coiled) as well as on the electric polarization mechanism in the polymers (orientational polarization of permanent dipole moment arising from localized carriers or induced polarization due to unlocalized carriers), in other words, on the mobility of charged carriers in the polymers.
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Research Products
(4 results)
