在自由基聚合反应动力学的研究中,最有效的方法是用ESR直接检测聚合反应过程中的增长自由基,得到有关增长自由基的结构、构象、浓度及分子运动等方面的信息,从而获得聚合反应过程中有关动力学方面的重要参数。苯乙烯(Styrent st)的聚合反应人们已经研究了多年,由于St增长自由基的浓度很低,难于检测,所以很少有人检测到St增长自由基的ESR谱。虽然Ballaid等勉强检测到St乳液聚合反应后期增长自由基的ESR谱, In the study of free radical polymerization kinetics, the most effective method is to use ESR to directly detect the growth of free radicals during the polymerization reaction, get the information on the structure, conformation, concentration and molecular movement of free radical growth to obtain Important parameters related to kinetics during polymerization. Polymerization of Styrene St It has been studied for many years that very few people detect the ESR spectrum of St-growing free radicals because of the low concentration of St-increasing free radicals and its difficulty to detect. Although Ballaid et al. Reluctantly detected the ESR spectra of free radicals grown late in the course of St emulsion polymerization,