Study of Polymer Dynamics by Nonlinear Dielectric Relaxation Spectroscopy

非线性介电弛豫谱研究聚合物动力学

基本信息

批准号：
61460073
负责人：
HAYAKAWA Reinosuke
金额：
$ 3.52万
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：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

项目摘要

in this study, nonlinear dieletric relaxation spectrometers in both the time and frequency domains were developed and applied to polymers with special functions. A summary of the study is as follows:1. A high-speed, high-voltage rectangular electric field generator and a circuit for detection of electric displacement were fabricated. By combining these equipments with a digital storage oscilloscope and a personal computer, we developed the time-domain nonlinear spectrometer for observing the acceleration of the rise response thme by a high electric field.2. Using a synthesizer, a high-volatge amplifier, the digital storage oscilloscope and the personal computer, we developed the frequency-domain nonlinear spectrometer for detecting the magnitudes and the phase retardations of the fundamental and the harmonics contained in the dielectric response.3. By use of the above spectrometers, we measured the nonlinear dielectric relaxation spectrum of the copolymer of vinylidene fluoride and trifluoro ethylene (ferroelectric, piezoelectric polymer) and the nonlinear conductivity spectrum of polythiophene (conducting polymer). The nonlinear dielectric relaxation spectrum of the copolymer observed in the temperature range around the Curie point gave information on local dipolar interactions important for the appearance of ferroelectricity, Further, by measuring the nonlinear conductivity spectrum of polythiophene in a wide temperature range from liquid nitrogen temperature to the room temperature, we obtained a new information on the conduction mechanism in conducting polymers.

在这项研究中，开发了时间域和频域中的非线性双骨骼松弛光谱仪，并应用于具有特殊功能的聚合物。该研究的摘要如下：1。制造了高速的高压矩形电场发生器和用于检测电位移的电路。通过将这些设备与数字存储示波器和个人计算机相结合，我们开发了时间域的非线性光谱仪，以通过高电场观察RISE响应THME的加速度。2。我们使用合成器，高挥物放大器，数字存储示波器和个人计算机，开发了频域非线性光谱仪，用于检测介电响应中基本质量和谐波的大小和相位迟缓和谐波。3。通过使用上述光谱仪，我们测量了乙烯基氟化物和三氟乙烯（铁电，压电聚合物）和非线性电导率光谱的非线性介电弛豫光谱。在居里点周围的温度范围内观察到的共聚物的非线性介电弛豫光谱提供了有关局部二极化相互作用的信息，对于铁电性的出现很重要，进一步，通过测量多噻吩的非线性电导率光谱在较广泛的液体温度温度到房间温度的广泛温度范围内，我们获得了孔仪的孔仪，以实现新的孔仪。