摘要
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.
Poly(2,3-dimethylaniline)(P(2,3-DMA)) was synthesized by a rapid emulsion polymerization using ammonium peroxydisulfate and ferrous ion(APS/Fe2+) as composite oxidants.The effect of Fe2+ on the rate of polymerization of 2,3-dimethylaniline(2,3-DMA) was discussed by open circuit potential(OCP) curves,and the molar ratio of APS and Fe2+ and the amount of composite oxidant were optimized by cyclic voltammetry and Tafel curves.And the characterization results of electrochemical properties of P(2,3-DMA) were proved by contrast analysis of infrared spectroscopy(FTIR) and X-ray diffraction(XRD).The experimental results showed that main infrared absorption peaks of P(2,3-DMA) which was synthesized by the composite oxidant exhibited red-shift.The phenomenon revealed that the structure of products was relatively complete and the electron delocalization increased.The optimal properties of P(2,3-DMA) were achieved when the molar ratio of APS to Fe2+ was 10∶1,the molar ratio of APS to 2,3-DMA was 3∶1.The open-circuit potential measurements indicated that the rate of polymerization of 2,3-DMA with the aid of Fe2+ had a substantial increase.The P(2,3-DMA) with higher yield,better electrochemical and crystal properties have been prepared by composite oxidant APS/Fe2+.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2013年第8期1033-1038,共6页
Acta Polymerica Sinica
关键词
聚2
3-二甲基苯胺
乳液聚合
复合氧化剂
快速引发
Poly(2,3-dimethylaniline),Emulsion polymerization,Composite oxidant,Rapid polymerization
