石英晶体微天平技术在苯胺乳液聚合动力学研究中的应用

采用石英晶体微天平(QCM)技术, 探讨了在有无磁场条件下, 用过硫酸铵(APS)作为引发剂时苯胺的乳液聚合动力学行为. 研究结果表明, 苯胺的乳液聚合反应速率对苯胺(An)是一级反应; 对APS和十二烷基苯磺酸(DBSA)均为0.5级反应. 磁场环境中苯胺的聚合速率比在无磁环境中的要快. 在有无磁场条件下, 反应的表观活化能分别为40.4和41.6 kJ/mol. 结果表明, QCM技术可以作为研究An聚合动力学的一种有效方法.

Application of QCM Technique in the Kinetics Study of Aniline Emulsion Polymerization

The kinetic behavior of aniline(An) emulsion polymerization using ammonium persulfate(APS) as the initiator in the presence and absence of a constant magnetic field(MF) was discussed via the quartz crystal microbalance(QCM) technique. The experimental results indicate that the reaction rate exhibited first-order with respect to aniline and half-order to APS and dodecylbenzene sulfonic acid(DBSA). The aniline polymerization rate in the presence of a MF was higher than that of aniline polymerization in the absence of a MF. The activation energy obtained under the two conditions were 40.4 and 41.6 kJ/mol, respectively. It is suggested that the QCM technique can provide an efficient way for the kinetic research of An polymerization.