N-乙基苯胺的聚合动力学研究

Kinetic study of the chemical oxidative polymerization of N-ethylaniline

以过硫酸铵为氧化剂,采用紫外光谱原位跟踪的方法对N-乙基苯胺在1.0mol/L的HCl溶液中的化学氧化聚合进行了动力学的研究。研究结果表明,聚合过程中,体系呈均相且颜色随聚合时间的延长而加深。中间产物和聚合物分别对应的吸收峰的强度也随EA和APS的浓度而变化。通过计算推导出了N-乙基苯胺的聚合速率与EA和APS的浓度的关系式。

The chemical oxidative polymerization of N-ethylaniline （EA） was carried in aqueous 1.0mol/L HCl solution using ammonium persulfate （APS） as an oxidant. The course of polymerization was followed by UV-vis spectroscopy. The medium was found to be homogeneous and became dark in color during the course of polymerization. The absor- bance corresponding to the intermediate and the polymer was followed for different concentrations of EA and APS at various time intervals of polymerization. Rate of polymerization （Rp） was determined for various conditions. The observed dependencies of the concentration of EA and APS on Rp were to deduce the rate equations for APS initiated EA polymerization.