聚邻乙氧基苯胺的导电及溶致变色性研究

Study on the conductivity and dissolving discoloration of poly(o-ethoxyaniline)

研究了一种聚苯胺衍生物聚邻乙氧基苯胺(POEA),以探讨取代基对聚苯胺聚合、掺杂、溶解的影响.通过化学氧化合成及重掺杂手段,制备了盐酸(HCl)、磺基水杨酸(SSA)、樟脑磺酸(CSA)、对甲苯磺酸(PTSA)等掺杂的聚邻乙氧基苯胺.以GPC、紫外、红外、XRD、四探针等测试手段,对不同掺杂态、脱掺杂态POEA进行了对比分析,同时考察了POEA在不同溶剂下的溶致变色行为.研究表明:脱掺杂态POEA数均分子量为62 834,掺杂后电导率达10-5～10-3S/cm,在常用有机溶剂中有良好的溶解性.随不同的氧化、掺杂程度,POEA溶液呈现红-蓝-绿-黄色的渐变历程,其极化子跃迁峰在494～880 nm移动.

A polyaniline derivative of poly（o-ethoxyaniline）（POEA） was studied to investigate the effect of substitute group in aniline on the synthesis,dopping and dissolving process of poly（substituted anilines）.The POEA dopped of hydrochloric acid（HCl）,the sulfonylurea salicylic acid（SSA）,camphor sulfonic acid（CSA）,and ptoluene sulfonic acid（PTSA） were prepared by the means of the chemical oxidation synthesis and redopping method.The states of different doped POEA were compared and analysized by GPC,UV,FTIR,XRD,Four Probe Methods and solubility measurements.The results show that the number-average Molecular Weight of undopped POEA is 62 834,the conductivity of doped states of POEA are in the range of 10-5 ~ 10-3 S/cm and they have good solubility in common organic solvents.The POEA solutions present a red-blue-green-yellow gradual colour changes along with different oxidation and doping level.Its polarization transition peak is in the range of 494~880 nm.