聚N-甲基苯胺的合成及性质表征

SYNTHESIS AND PROPERTIES OF POLY(N-METHYL ANILINE)

首次用化学法合成了聚N-甲基苯胺(PMAn),系统研究了氧化剂浓度、介质酸浓度、单体(MAn)浓度对聚合反应及所得产物性质的影响。利用FTIR等手段对产物进行了初步表征。结果表明:PMAn具有较高电导和良好的稳定性,其本征态在一系列有机溶剂中可溶,在酸性介质中呈电活性。具有较高电导的产物的链结构主要是1,4-连接的头尾结构,链上同时存在苯式及醌式两种结构单元。

Poly (N-methyl) (PMAn) was obtained by chemical oxidative polymerization -with (NH4)2S2O8 as oxidant in HC1 aqueous. The effect of the concentration of oxidant, HC1 and monomer oa the polymerization was investigated systematically. FTIR, TGA, element analysis and cyclic voltammogram were emploied to characterize the polymers obtained. The results reveal that PMAn is conductive, has good stability, and displays well-defined elect-roactivity in acidic medium. The neutral PMAn is soluble in some organic solvents and a lustrous free-standing film can be obtained by casting from the solution. The products with higher conductivity are mainly 1,4-connected head-to-tail chain structure, both benzenoid and quinoid units exist in the polymer chain.