氧化剂对界面聚合法合成的聚邻甲苯胺结构和性能的影响

Influences of different oxidants on the structure and properties of Poly(o-toluidine)synthesized by interfacial polymerization

采用三种不同氧化剂(FeCl_3,(NH_4)_2S_2O_8以及由K_2S_2O_8,CuSO_4和NaHSO_3构成的复合氧化剂),通过界面聚合法合成了聚邻甲苯胺。利用红外光谱、紫外可见光谱、粘度测定、扫描电镜和循环伏安等测定方法,对聚合物进行了表征,并对聚合物形貌、结构及性能进行了初步探讨。结果表明,界面聚合法合成的聚邻甲苯胺呈现出微米级颗粒状分布,颗粒直径大多在几百纳米范围内。所得聚合物表现出较好的电化学活性。采用FeCl_3为氧化剂时,聚合物分子链的共轭程度、分子量以及电化学活性最佳。

Poly（o-toluidine） was synthesized by interfacial polymerization using iron chloride, ammonium persulfate, and a complex （composed by K2S2O8, CuSO4 and NaHSO3） as oxidant, respectively. The molecular structures, morphologies and electrochemical behaviors were detected by FT-IR, UV VIS, SEM and Cyclic voltammetry. The results showed that poly（o-toluidine） particles appeared as micro powder and their diameters were within several hundred nanometers. All the three polymers showed good electrochemical activity. When using FeCl3 as oxidant, the molecular weight and conjugated degree, as well as the electrochemical activity of the poly（o- toluidine）, were the best.