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采用乳液法,以过硫酸铵(APS)和硫酸亚铁(FeSO4)为复合氧化剂(COD),快速引发合成聚2,3-二甲基苯胺(P(2,3-DMA)).通过开路电位(OCP)、循环伏安(CV)和塔菲尔(Tafel)测试,探讨了Fe2+对2,3-DMA聚合速率的影响,优化了APS/Fe2+摩尔比(n(APS)/n(Fe2+))及COD用量.通过红外光谱(FTIR)和X-射线衍射(XRD)对比分析,印证了P(2,3-DMA)电化学性能的表征结果.结果显示,APS/Fe2+复合氧化剂引发合成的P(2,3-DMA),其FTIR的主要特征峰发生了红移,表明所得产物的结构更加完整,电子离域程度更大;当n(APS)/n(Fe2+)为10∶1,n(COD)/n(2,3-DMA)为3∶1时,产物的各项性能达到最佳;开路电位显示,Fe2+的加入使得2,3-DMA的聚合速率得到显著提高,采用复合氧化剂APS/Fe2+制备P(2,3-DMA)的产率增大,电化学性能和结晶性更佳.
The poly (2,3-dimethylaniline) (P (2,3-DMA)) was rapidly initiated by the emulsion method using ammonium persulfate (APS) and ferrous sulfate (FeSO4) as the complex oxidant (OCP), cyclic voltammetry (CV) and Tafel test were used to investigate the effects of Fe2 + on the polymerization rate of 2,3-DMA. The optimum conditions of APS / n (Fe2 + ) And COD content.The results of electrochemical characterization of P (2,3-DMA) were confirmed by FTIR and XRD.The results showed that APS / Fe2 + P (2,3-DMA), the main peak of the FTIR redshift, indicating that the resulting product more complete structure, the degree of delocalization of electrons more; when n (APS) / n , the best performance of the product was obtained when the ratio of n (COD) / n (2,3-DMA) was 3:1. The open circuit potentials showed that the polymerization rate of 2,3-DMA was significantly increased with the addition of Fe2 + The yield of P (2,3-DMA) by the composite oxidant APS / Fe2 + increases, and the electrochemical performance and crystallinity are better.