新型聚省醌自由基高聚物的电磁性能

ELECTRICAL AND MAGNETIC PROPERTIES OF NEW POLYACENE QUINONE RADICAL POLYMERS

通过共缩聚合成了几种新型的，压阻系数很高的聚省配自由基高聚物（PAQR）．实验发现：在直流电导率对数与外界压力（0．01～1．0GPa）平方根的线形关系上有一个转折点（约0．11GPa）；Mott—T－1／4规律的适用范围可延伸至高温区（298～486K）；直流电导率和自旋浓度，g因子和峰—峰线宽之间与共编聚时引入的六氟二酐的物质的量比存在类似的变化趋势，在不同温度下介电系数的对数与压力平方根的线性关系图形并不完全服从Pohl的理论预示．

The several new polycene quinone radical (PAQR) co-polymers with very high Pressure resistivity coefficient were synthesized by condensation. It was experimentally found that a kink exists at about 0.11GPa on plots of log d.c. conductivity verses the square root of external pressure in a range from 0.01 to 1.0GPa; an applicable extent of Mott-T-1/4 law can expand to more high temperature region of 290-400K; there is an analogue trend of the changes between the d.c. conductivity and spin concentration and between g factor and peak-to-peak linewidth with mole fraction of 4,'4-(hexafluoroisopro-phlidene)-diphthalic anhydride (HFDA)introducecd;and the plot of log dielectric constant uersus the square root of external pressure at various temperatures does not fully obey the linear relationship theoretecally expected by Pohl.