Electric Birefringence Relaxation Spectroscopy of Electroactive Polymer Solutions

电活性聚合物溶液的电双折射弛豫光谱

基本信息

批准号：
63460067
负责人：
HAYAKAWA Reinosuke
金额：
$ 4.03万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

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.

很难通过使用可见光光源（例如He-ne激光器或AR ION激光器）来测量电活性聚合物与共轭电子的溶液的电力松弛，因为此类聚合物通常在可见光范围内具有强吸收带。在这项研究中，通过利用高功率半导体激光作为近红外光源，我们开发了高临界性，宽带电力双重双向弛豫光谱仪，使我们能够在很短的时间内检测到聚合物的宽松光谱的总体谱。获得的结果如下1。已经开发了具有高稳定性和高功率的半导体激光源系统。通过将此光源与高速，高分辨率的瞬态内存和个人计算机相结合，我们已经意识到了高准确的实时电动双折射松弛光谱仪2。通过使用该光谱仪，我们已经测量了典型的电活性聚合物（例如良好溶剂和较差的聚噻吩）等典型的电活性聚合物的电折线松弛光谱，并获得了聚合物构象（Rodlike或随机盘绕）的信息，以及从近极化的临时极化机制中获得的，以及在聚合量的跨层次偏振机制中获得的信息，并获得了信息。换句话说，对聚合物中带电的载体的活动性进行了未含量的载体。