引发剂用量对聚联苯胺结构及性能的影响

Effects of Monomer Oxidant Molar Ratio on the Structure and Properties of Polybenzidine

摘要:

采用界面聚合法在不同单体与引发剂摩尔比（室温）下合成了聚联苯胺。利用红外光谱(FT-IR)，紫外可见吸收光谱(UV-vis)，投射电镜(TEM)，X-射线衍射(XRD)，循环伏安(Cyclic Voltammogram)等表征手段初步探讨了引发剂用量对聚联苯胺形貌、结构和性能的影响。结果表明：采用界面聚合法合成的聚联苯胺均呈现微米级棒状形貌，分布均匀且表面光滑，引发剂用量对聚合物形貌没有明显影响；通过结构分析及循环伏安测试可知，欲得到共轭程度、分子链排列规整性及电化学活性最佳的聚联苯胺，单体与引发剂摩尔比不宜过高或过低，本实验条件下，最佳比例为1:1。

Abstract:

Polybenzidine was synthesized by interfacial polymerization under various monomer oxidant molar ratio. Effects of monomer oxidant molar ratio on morphology, structure, and properties of polybenzidine were studied by techniques of Fourier Transform Infrared Spectroscopy (FT-IR), Ultraviolet Visible Absorption Spectroscopy (UV-vis), Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), and Cyclic Voltammetry (CV). The results showed that all of the samples were microrod-like and the surface of the microrods was smooth and uniform. The changes of monomer oxidant molar ratio had no obvious effect on the morphology of the polybenzidine. The results of structural analysis and cyclic voltammetry indicated that the monomer oxidant molar ratio should not be very high or very low to obtain the polybenzidine with the optimal degree of conjugation, order arrangement of molecular chain, and the best electrochemical behaviors. The suitable proportion in this work was 1:1.